Holset Turbos, PART 4

[dsm-onster]

I doubt the bolton turbine housing with the standard hx35 turbine wheel will be enough flow for the 60lb/min 7blade hx35 (later hx35) compressor. It IS DEFINATELY enough for the 8blade 52 lb/min hx35 compressor. Since we've seen several 500whp bolton hx35 turbo setups.

The larger .70 a/r housing spool about 10% slower than the bolton housing when running an hx40 chra. I expect there to be about a 10% diference with the hx35. The hx35 reaches full boost at 3500ish rpms with 272s. This would put spool at 3900rpms. And possibly enough turbine flow to push the 60lb/min later hx35 compressor wheel.

I'd like to try it. But the stock hx35 turbine housing with the hx35 turbine wheel and the center divider knifedged has gone 132mph in the 1/4 mile with a full weight 1g awd. The full spool is right under 4000rpms. And requires a vband o2 housing, just like the .70 a/r BEP housing. . .

 

[turbotalon1g]

I just think that with the HX35 in a T3 with the 59 lb/min wheel could beat a huge competitor to the GT35/SC61 sized turbos but of course with better spool.
Only thing is I love my spool, hence the B16G,SCM61, now E316G.
I want to switch my whole exhaust system to V-band so no biggie on that.
I hope that the HX35 fills my need for top end. I can say that the bolton housing does seem to show enough potential for me though, even in the HX40.

 

[DoyoFCT]

So the turbine housings list on High Tech Turbo

these are Divided T4 housings or T3? also I found this chart on Stealth 316, if anyone was curious what some a/r conversions would be.

6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R

So the smallest housing they sell is a .89? anyone using a housing listed on that site?

 

[dsm-onster]

As discussed in the last holset thread, those numbers will DEFINATELY not correspond to holset numbers. the hx35 12cm^2 turbine housing is NOT .89 area/radius.

A turbine a/r number can only be compared to other a/r numbers in the same brand frame size and same scroll design. No t4 frame size to t3 frame size comparison. No Holset to MHI comparison. No comparison of twinscroll to non-twinscroll even in the same frame size and brand. You will not get a laggy turbo witha 12cm^2 holset turbine housing running a divided runer manifold. Though, that list suggests that it would be a .89 a/r turbine housing around a t31 size turbine wheel.

The holset h1e/hx40 19cm^2 turbine housing has individual volutes about the size of the garrett t3 .63 a/r turbine housing volute.

TimG is using the 12cm^2 housing oin his hx35/40 hybrid and IIRC he sees full boost at 4000rpms with a NON-divided runner manifold. This makes the exhaust pulses see BOTH scrolls (in effect doubling the a/r). It still spools very well for how much power the turbo can support, 132mph with a full weight AWD T/E/L: about 600whp. 'Fooling' the gases into seeing bot volutes as one makes for a very good flowing turbine housing. A loss of 4-500rpms vs. a BEP housing which has a slightly larger, single volute. The individual volutes of the holset 12cm^2 housing is about the size of an MHI 6cm^2 housing from my visual comparison.

Exhaust is pulsed. It doesn't care about the total area to radius. It just sees the area of the particular volute in which it is moving. This is why holset and garrett and mhi twin scroll housings are much larger in total a/r to their non-twinscroll counterparts. I.e., evo3 16g vs. evo8 16g: 7cm^2 vs. 10cm^2 housings and the larger housing much spools faster.

I THINK those housings are for either hx35 or hx40. HTTurbo may cut to fit. . . Which would be nice since no one has yet tried a divided runner true twinscroll hx35 or hx40 setup. We would could run a divided runner setup with the hx35 OR hx40 and have options of different size turbine housings insuring that we get a system that spools fast enough for us yet won't choke up top. In a divided runner setup, I would speculate that the 12cm^2 housing may be a little small for the potential of the hx34 compressor wheel and I think the 19cm^ hx40 turbine housing would be a little needlessly larger for the small 60 lb/min 8blade hx40 compressor wheel. I will be running my 8blade h1e (hx40) this upcoming year with a divided runner setup. So one way or another, we'll find out. . .

 

[ceedawg]

I will be running my 8blade h1e (hx40) this upcoming year with a divided runner setup. So one way or another, we'll find out. . .

THe question is when????

Unfortunately I won't be ready until Jan or early Feb to have my TS 18cm2 Holset housing built to work on my 6blade HX40. I will be getting the T3 TS mani from GVautosport to run my Holset setup.
I will experiment with both the 16cm2 hsing and the 18cm2 hsing. In addition I will be adding a ETS 26x12x4" FMICsetup to the Mix.

DSM-Mon I am hoping and looking to your results b4 mines hopefully. Hurry up and good luck!

PS,by looking at the results of Tim's 40/35 hybrid (impressive) I'm sure I would have been happy with that hybrid setup I sold and lost $$ on.

 

[GST95]

I was looking at my T3 18cm housing today and noticed that the inlet tapered down smaller than the volute and there were pretty big indents for the bolts. I decided to gasket match it and slim down the protrusions. I didnt want to trim the protrusions too much and create a posible crack later, but its alot better than it was. I didnt touch the divider wall or go below the bolt protrusions. I probably should have ported out the wastegate hole a little, but i think it will be big enough. I forgot to take a pic before i started, but i remembered before i touched the 2nd port.

Does anybody have any tricks for getting the big c-clip back on the compressor cover? I tried to use a pair of vice grips, but it flung out and shot all the way across the room. All my ring pliers are too small. I like the v-band compressor cover much better.

Here are the pics

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I tried to get a pic of the volute. This was the brightest i could get.

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[jking29]

TimG is using the 12cm^2 housing oin his hx35/40 hybrid and IIRC he sees full boost at 4000rpms with a NON-divided runner manifold. This makes the exhaust pulses see BOTH scrolls (in effect doubling the a/r). It still spools very well for how much power the turbo can support, 132mph with a full weight AWD T/E/L: about 600whp. 'Fooling' the gases into seeing bot volutes as one makes for a very good flowing turbine housing. A loss of 4-500rpms vs. a BEP housing which has a slightly larger, single volute. The individual volutes of the holset 12cm^2 housing is about the size of an MHI 6cm^2 housing from my visual comparison.

Exhaust is pulsed. It doesn't care about the total area to radius. It just sees the area of the particular volute in which it is moving. This is why holset and garrett and mhi twin scroll housings are much larger in total a/r to their non-twinscroll counterparts. I.e., evo3 16g vs. evo8 16g: 7cm^2 vs. 10cm^2 housings and the larger housing much spools faster.

I THINK those housings are for either hx35 or hx40. HTTurbo may cut to fit. . . Which would be nice since no one has yet tried a divided runner true twinscroll hx35 or hx40 setup. We would could run a divided runner setup with the hx35 OR hx40 and have options of different size turbine housings insuring that we get a system that spools fast enough for us yet won't choke up top. In a divided runner setup, I would speculate that the 12cm^2 housing may be a little small for the potential of the hx34 compressor wheel and I think the 19cm^ hx40 turbine housing would be a little needlessly larger for the small 60 lb/min 8blade hx40 compressor wheel. I will be running my 8blade h1e (hx40) this upcoming year with a divided runner setup. So one way or another, we'll find out. . .

This has me seriously rethinking building the twin scroll manifold for my hx35. I have a 8 blade hx35 with a 12cm housing and was going to build a twin scroll to ensure I would see full boost by 4000. I just went and looked at mine and compared each volute to a 6cm 14b turbine housing, and I agree that they appear to be nearly equal. With a twin scroll manifold this thing has the possibility of spooling nearly as fast as a 14b. If that's the case, I believe I will stick with an open t3, as I can't imagine trying to drive a fwd with a 50 lb/min turbo that spools like a 14b. A little bit of lag is a good thing in this case.

 

[GST95]

This has me seriously rethinking building the twin scroll manifold for my hx35. I have a 8 blade hx35 with a 12cm housing and was going to build a twin scroll to ensure I would see full boost by 4000. I just went and looked at mine and compared each volute to a 6cm 14b turbine housing, and I agree that they appear to be nearly equal. With a twin scroll manifold this thing has the possibility of spooling nearly as fast as a 14b. If that's the case, I believe I will stick with an open t3, as I can't imagine trying to drive a fwd with a 50 lb/min turbo that spools like a 14b. A little bit of lag is a good thing in this case.

With a non-divided manifold you should still see full boost by 4k with the 12cm housing. My wh1c is almost the same as the early hx35 and i was surprised how quickly it spooled. One thing that might not benefit you is how fast boost ramps up when it starts to spool though. I think you are gunna have your hands full with a fwd and this size of turbo no matter what it is though.

 

[Slippi84]

I was looking at my T3 18cm housing today and noticed that the inlet tapered down smaller than the volute and there were pretty big indents for the bolts. I decided to gasket match it and slim down the protrusions. I didnt want to trim the protrusions too much and create a posible crack later, but its alot better than it was. I didnt touch the divider wall or go below the bolt protrusions. I probably should have ported out the wastegate hole a little, but i think it will be big enough. I forgot to take a pic before i started, but i remembered before i touched the 2nd port.

Does anybody have any tricks for getting the big c-clip back on the compressor cover? I tried to use a pair of vice grips, but it flung out and shot all the way across the room. All my ring pliers are too small. I like the v-band compressor cover much better.

I hope you didn't mess with that too much because they are designed like that for a reaso. To keep velocity and flow up and help out with spool. That housing really doesn't need to be ported to flow plenty and spool is fine alredy.

 

[dsm-onster]

Normally I don't agree with porting the turbine housing and exhaust manifold outlet, like is done on a 2g mani & 16g setup or a evo3 mani & 16g setup. Why? because you're making the collector larger in volume and this will slow velocity down as mentioned, which is never good preturbo. I always do this with my 2g manifolds to get a good smooth transition. And, at the most, just port the 2g manifold inner step. With the evo3 manifold, you have the seal ring which helps save your turbo/mani gasket any way. It keeps the collector volume down and creates a smooth transition at the same time. They are cheap. A whole lot better than doing hours of port work for arguably inferior results. Infact, you an create you own seal ring from a 2" galvanized pipe nipple from lowes/depot. It's like my 2g mani to 16g mod but you will create a taller ring.

However, in this case with the the garrett & IHI t3 divided flange and the garrett & IHI open flange both have a more square hole than the holset hole. A good portmatch would be in order to keep velocity up because the gases would hit a lip.

 

[GST95]

I hope you didn't mess with that too much because they are designed like that for a reaso. To keep velocity and flow up and help out with spool. That housing really doesn't need to be ported to flow plenty and spool is fine alredy.

I didnt think anybody had tried a 18cm T3 housing on a hx40, so we dont know when it will spool. Ive never seen a turbo that had a smaller inlet than the volute though. I didnt hog it out or go past the bolt protrusions or mess with the volute, so i dont think i hurt anything. It kinda looks like i did from the pics though because the housing is new. I just matched my header to the housing and did a little blending, so it should help velocity. Now the gasses only hit 1 wall(center divider) instead of 3. I believe this housing was designed this way because its a T3 flange, not for flow or velocity. It looked to me more of a compromise for fitment. I havent seen a T4 flanged holset housing, but i have a feeling that it wouldnt need the bolt indents.

 

[dsm-onster]

No it doesn't need the bolt indents. I agree that the t3 flange with the 18.5 cm turbine housing was a factory compromise. The t4 19cm^2 h1e or hx40 turbine housings are exactly the same size as the 18.5cm^2 housing, from the comparison of my housings. But the t4 19cm^2 housing has a better transition because the t4 foot print has a larger area.

I'd knife-edge that center divider, like TimG did and so many of the turboford/turbobrick/honda guys do.

Morphius, I have a revised description of the holset turbo breed. I keep getting so many PMs about 'which turbo will I need' and 'which is which holset'. I think this revised description can be something to where we can point to give all the basic questions clear answers:

HX35:

The 8blade hx35 has a 56mm compressor inducer. This is found on 1995-1998 cummins manual pickups. The compressor flows 52 lb/min according to the compressor map. The bolton BEP housing (0.55 a/r) is enough to push the limit of the compressor. There's several 500whp 8blade hx35 cars out there with the bolt on housing. It reaches 20+psi by 3500rpms in 3rd with 272 cams. Smaller cams would equal a faster spool speed in most cases.

The 7blade hx35 has a 56mm compressor inducer. This is found on the 1999-2002 cummins manual pickups. The compressor flows 60lb/min according to the compressor map and logged results from a member here. The bolton BEP housing with the hx35 turbine wheel do not SEAM to have enough flow to really reach the potential of 60lb/min. But many have logged over 50lb/min so far and seen 500whp. The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

HY35:

The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.

H1C/WH1C:

In 1994, there was the Wh1c which has pretty much the identical compressor as the hx35 but with a Vband compressor cover. The turbine wheel is the same. It will bolt into the BEP bolton hx35 turbine housing. It has 4 bolts at the housing instead of 6. So you will need to buy 2 more bolts and use 6 washers cut to make a flat side. Honestly, I just used bolts that were cut a little short and the bolt head was wide enough to pull the chra to the turbine housing. No sealing issues. Since the Wh1c is for all practical purposes an 8blade hx35 the spool and flow is the same too.

I have the big h1c. It comes on the INTERCOOLED 1991-1993 cummins pickups. It has the webbing for MWE but no groove cut like the hx35/wh1c has. This turbo I term the big h1c because it has a 54mm compressor inducer and same exducer than the 8blade hx35/Wh1c. The other h1c is the small h1c found on the NON-intercooled cummins pickups. This has a 50mm inducer but only 7blades and has no webbing for MWE. Less blades helps flow, but so does a larger inducer diameter. The most whp ever recorded on a gas 4cylinder with the small h1c was done on a KA24 nissan: 411whp. Since the big h1c has a 4mm larger inducer and the same turbine wheel as the hx35, it is safe to say that it flows enough for between 411whp and 500whp. The diesel sources state that it flows SLIGHTLY less than the early hx35. So 4lb/min less than the 8blade hx35 puts the flow of the big h1c at 48-49lb/min right where a 50-trim or 20g is. The small bep housing is all that's needed to get the most from the compressor and the spool speed is 20+psi by 3500rpms.

HX35-40 hybrid:

Keeping the long tradition of the marriage of sportcompact and hybrid turbos, there is the hx35 turbine and the hx40 compressor. It is strongly recommended to use the large bep turbine housing or the stock hx35 turbine housing with an non-divided t3 manifold for this turbo. The small bep housing around a t31 size hx35 turbine wheel is probably not enough to merit any of the hx40 compressor wheel upgrades. 20+ psi by 4000rpms can be seen in the hx35/40 with the hx35 12cm^2 turbine housing with a non-divided t3 manifold. With the large bep housing, spool times are to be determined. But likely similar.

HX40:

The 8blade hx40 has a 58mm inducer and flows about the same as a 60-1 (around 60lb/min) with ALOT better high boost efficiency and spool speed. It is the most common hx40 out there. The small bep housing with the hx40 turbine wheel is plenty to reach the full potential of the 60lb/min 8blade hx40 compressor. 20+ psi by 4100rpms with 272s.

The 7 and 6 blade hx40 is called the super40 and has the 60mm compressor inducer. This compressor flows around 69lb/min. You can get this wheel in billet style (think HTA). The non-billet wheel spools as fast as the 8blade hx40 in the bolton bep housing and has done 653whp at 40psi per the holset results only thread. Billet should spool even faster. The t3 .70 a/r BEP housing slows spool about 400rpms. But reports show a significant gain in flow per psi. So expect more power at lower boost with that turbine housing.

H1E/WH1E:

The Wh1e is like it's little brother the Wh1c. It mirrors the hx40 8blade in every way except that it has a v-band compressor cover and a 4bolt chra-turbinehousing pattern. It will consequently bolt into the hx40 bep bolton turbine housing and this is plenty of flow to max out its 60lb/min compressor.

The h1e is like it's little brother the h1c. There are different size compressors. . . BUT there are also different size turbine wheels too. Check measurements before buying this turbo if you plan on running a BEP turbine housing. There are lower flowing compressors than the 58mm 8blade that are out there. So this turbo may not flow any more than an hx35 if get the wrong one. You need at least a 58mm compressor inducer for this to be a worthwhile turbo vs the proven hx35 or 8blade hx40.

HX52:

This is a big sucker. It is commonly found on the Volvo Semis and usually has a billet compressor wheel. It flows 88lb/min. There is no bolt on housing for it. If you want a bolton housing for this turbo, then you don't want this turbo. In fact if you want a t3 flange turbine housing for this turbo, then you don't want this turbo. You DO want this turbo if you're looking at a gt4294r or gt4202r. The turbine inlet is slightly different than a t4 bolt pattern. You can still get the t4 manifold to work just fine by enlarging the bolt holes.

Misc.:

• Holset's don't spool slow. They spool faster than their garrett or mitsubishi counterparts. Diesel exhaust is cold and slow moving.

• The holset turbine wheel is a work of art. It has been shown to flow very well in a very small turbine housing. For example the hx40 turbine wheel in the small .55 ar bep bolton housing flows as much as a garrett gt35r turbine wheel in a larger .63 ar garrett t3 turbine housing. The hx40 with this configuration spools about 500rpms faster! You can upgrade to the .70 a/r BEP t3 turbine housing and have the same or slightly faster spool speed as the above gt35r with ALOT more flow per psi and consequently more horsepower per psi. This makes for VERY good pumpgas numbers.

• Holset patented map width enhancement. They do not have extended tip technology, but there compressors show more efficiency than their garrett or mitsubishi counterpart.

• They have superback technology witch leads to VERY, VERY durable compressors. The are designed to be overworked and underpaid.

• There are discrepancies all over the web concerning the compressor maps. Take what you hear/read with a grain of salt and a shot of tequila, and the worm.

• The holset is fine with stock 4g63 oil pressure from the oil filter housing. If you have no b shafts, you'll need a restrictor. The drain line is a garret bolt pattern. The feed line is different for different turbos.

 

[Slippi84]

No it doesn't need the bolt indents. I agree that the t3 flange with the 18.5 cm turbine housing was a factory compromise. The t4 19cm^2 h1e or hx40 turbine housings are exactly the same size as the 18.5cm^2 housing, from the comparison of my housings. But the t4 19cm^2 housing has a better transition because the t4 foot print has a larger area.

I'd knife-edge that center divider, like TimG did and so many of the turboford/turbobrick/honda guys do.

My gasket has a kinda lip that comes up to give it that knife edge type effect without having to cut or machine the manifold or housing. I got it from PTE.

 

[dsm-onster]

That's pretty neat. I didn't know there was such a thing. . .Do you have a pic or link? It would be good for others to see this. Since timG has had such good success with the hx35 turbine housing.

 

[Slippi84]

That's pretty neat. I didn't know there was such a thing. . .Do you have a pic or link? It would be good for others to see this. Since timG has had such good success with the hx35 turbine housing.

It'a already all bolted up now and that shit was a bi*** to bolt up so it's not coming off but it's really nothing that special or atleast I didn't think so. Like right where the divider is in the middle of the gasket it has a kinda hump or whatever you want to call it that comes up and acts just like a knife edge. Just hit up PTE they have the gaskets it cost me like $25 but it's not cheap paper gasket it's more like a very think version of the SBR metal gaskets you see that you never have to replace.

 

[GST95]

I think i should get one of those gaskets too. I didnt know something like that existed. Is it thin like a normal gasket? My turbo sits a little lower than id like as it is so i dont know if i could use it if its too thick. I didnt knife edge mine incase i decided to go divided header later.

Are the .5cm sized housings all non wastegated? All the ones ive seen are.

 

[Morphius]

Morphius, I have a revised description of the holset turbo breed. I keep getting so many PMs about 'which turbo will I need' and 'which is which holset'. I think this revised description can be something to where we can point to give all the basic questions clear answers:

HX35:

The 8blade hx35 has a 56mm compressor inducer. This is found on 1995-1998 cummins manual pickups. The compressor flows 52 lb/min according to the compressor map. The bolton BEP housing (0.55 a/r) is enough to push the limit of the compressor. There's several 500whp 8blade hx35 cars out there with the bolt on housing. It reaches 20+psi by 3500rpms in 3rd with 272 cams. Smaller cams would equal a faster spool speed in most cases.

The 7blade hx35 has a 56mm compressor inducer. This is found on the 1999-2002 cummins manual pickups. The compressor flows 60lb/min according to the compressor map and logged results from a member here. The bolton BEP housing with the hx35 turbine wheel do not SEAM to have enough flow to really reach the potential of 60lb/min. But many have logged over 50lb/min so far and seen 500whp. The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

HY35:

The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.

H1C/WH1C:

In 1994, there was the Wh1c which has pretty much the identical compressor as the hx35 but with a Vband compressor cover. The turbine wheel is the same. It will bolt into the BEP bolton hx35 turbine housing. It has 4 bolts at the housing instead of 6. So you will need to buy 2 more bolts and use 6 washers cut to make a flat side. Honestly, I just used bolts that were cut a little short and the bolt head was wide enough to pull the chra to the turbine housing. No sealing issues. Since the Wh1c is for all practical purposes an 8blade hx35 the spool and flow is the same too.

I have the big h1c. It comes on the INTERCOOLED 1991-1993 cummins pickups. It has the webbing for MWE but no groove cut like the hx35/wh1c has. This turbo I term the big h1c because it has a 54mm compressor inducer and same exducer than the 8blade hx35/Wh1c. The other h1c is the small h1c found on the NON-intercooled cummins pickups. This has a 50mm inducer but only 7blades and has no webbing for MWE. Less blades helps flow, but so does a larger inducer diameter. The most whp ever recorded on a gas 4cylinder with the small h1c was done on a KA24 nissan: 411whp. Since the big h1c has a 4mm larger inducer and the same turbine wheel as the hx35, it is safe to say that it flows enough for between 411whp and 500whp. The diesel sources state that it flows SLIGHTLY less than the early hx35. So 4lb/min less than the 8blade hx35 puts the flow of the big h1c at 48-49lb/min right where a 50-trim or 20g is. The small bep housing is all that's needed to get the most from the compressor and the spool speed is 20+psi by 3500rpms.

HX35-40 hybrid:

Keeping the long tradition of the marriage of sportcompact and hybrid turbos, there is the hx35 turbine and the hx40 compressor. It is strongly recommended to use the large bep turbine housing or the stock hx35 turbine housing with an non-divided t3 manifold for this turbo. The small bep housing around a t31 size hx35 turbine wheel is probably not enough to merit any of the hx40 compressor wheel upgrades. 20+ psi by 4000rpms can be seen in the hx35/40 with the hx35 12cm^2 turbine housing with a non-divided t3 manifold. With the large bep housing, spool times are to be determined. But likely similar.

HX40:

The 8blade hx40 has a 58mm inducer and flows about the same as a 60-1 (around 60lb/min) with ALOT better high boost efficiency and spool speed. It is the most common hx40 out there. The small bep housing with the hx40 turbine wheel is plenty to reach the full potential of the 60lb/min 8blade hx40 compressor. 20+ psi by 4100rpms with 272s.

The 7 and 6 blade hx40 is called the super40 and has the 60mm compressor inducer. This compressor flows around 69lb/min. You can get this wheel in billet style (think HTA). The non-billet wheel spools as fast as the 8blade hx40 in the bolton bep housing and has done 653whp at 40psi per the holset results only thread. Billet should spool even faster. The t3 .70 a/r BEP housing slows spool about 400rpms. But reports show a significant gain in flow per psi. So expect more power at lower boost with that turbine housing.

H1E/WH1E:

The Wh1e is like it's little brother the Wh1c. It mirrors the hx40 8blade in every way except that it has a v-band compressor cover and a 4bolt chra-turbinehousing pattern. It will consequently bolt into the hx40 bep bolton turbine housing and this is plenty of flow to max out its 60lb/min compressor.

The h1e is like it's little brother the h1c. There are different size compressors. . . BUT there are also different size turbine wheels too. Check measurements before buying this turbo if you plan on running a BEP turbine housing. There are lower flowing compressors than the 58mm 8blade that are out there. So this turbo may not flow any more than an hx35 if get the wrong one. You need at least a 58mm compressor inducer for this to be a worthwhile turbo vs the proven hx35 or 8blade hx40.

HX52:

This is a big sucker. It is commonly found on the Volvo Semis and usually has a billet compressor wheel. It flows 88lb/min. There is no bolt on housing for it. If you want a bolton housing for this turbo, then you don't want this turbo. In fact if you want a t3 flange turbine housing for this turbo, then you don't want this turbo. You DO want this turbo if you're looking at a gt4294r or gt4202r. The turbine inlet is slightly different than a t4 bolt pattern. You can still get the t4 manifold to work just fine by enlarging the bolt holes.

Misc.:

• Holset's don't spool slow. They spool faster than their garrett or mitsubishi counterparts. Diesel exhaust is cold and slow moving.

• The holset turbine wheel is a work of art. It has been shown to flow very well in a very small turbine housing. For example the hx40 turbine wheel in the small .55 ar bep bolton housing flows as much as a garrett gt35r turbine wheel in a larger .63 ar garrett t3 turbine housing. The hx40 with this configuration spools about 500rpms faster! You can upgrade to the .70 a/r BEP t3 turbine housing and have the same or slightly faster spool speed as the above gt35r with ALOT more flow per psi and consequently more horsepower per psi. This makes for VERY good pumpgas numbers.

• Holset patented map width enhancement. They do not have extended tip technology, but there compressors show more efficiency than their garrett or mitsubishi counterpart.

• They have superback technology witch leads to VERY, VERY durable compressors. The are designed to be overworked and underpaid.

• There are discrepancies all over the web concerning the compressor maps. Take what you hear/read with a grain of salt and a shot of tequila, and the worm.

• The holset is fine with stock 4g63 oil pressure from the oil filter housing. If you have no b shafts, you'll need a restrictor. The drain line is a garret bolt pattern. The feed line is different for different turbos.

Cool!! I'll add this to the Results thread (and likely to the start/end of the discussion threads) which I think inaddition to actual results , information like this can go in the first 2-3 posts I made as "core" info regarding the turbos. I had typed up a response here Tues. suggesting someone do something similiar, but my cat managed to take a walk across the keyboard and it reloaded the prior page losing my post. If anyone had something like this or a collection of some type of core info (ex. OEM/T3/T4 exhaust manifolds used and what clearance they provide to the block/water pipe), I would be happy to post consolidated info into the thread and give said person credit for doing so.

I think that thread and these discussion threads have turned out very positive. I hope everyone can see that. Spend a 1/2 hour with google. From the UK, Malaysia and many sites in NA, they all are using our info for these turbos. I know tuners and other similar boards at times get's alot of bad rap for some things. However, I feel with some slight structure, the community has come together, at least in relation to these turbos, to provide and build one of the greatest resources for information regarding Holsets running on 4 cyl engines.

Also, some complain about the size of the threads or number of posts and digging for info. Well, please take 5 minutes and enter the noobie forum and search Holset. There are ALOT of threads. Had an effort to consolidate these not been made, the same thing would have happened here. I agree they are large and long. Lots of reading. But the result is all the info in specific structured threads that are linked.

Regarding the 'Results thread'. Please post only results. Again, the idea is to make it a smaller, condensed, core infomation based thread. Please keep discussion to these discussion threads. There are some instances, as you've seen lately, by dsm-onster, who posted some info by other members that don't frequent the board. He's taken upon himself to be a sort of keeper of key info and posts and has offered up rounding up those individuals that have posted results over the past 4 years. So, if said individuals don't get back with him, he will be posting their results in the thread. If the owners of that setup want to post their own post later, they are more than welcome and Dsm-onster will delete his post with their info. Special thanks to Dsm-onster for his assistance in that and to all of you that have continued to contribute here and in the prior discussion threads.

 

[Morphius]

Speaking of results, where's AeroSalle (sp?) with his HE351VE setup and logs? I've seen them other places... it'd also be good to see that in the results thread.

 

[Zack Huffman]

I'm very interested in his results too. The HE351 turbos are found more easily on eBay than the HX40, and the possibility of actually using a VGT mechanism could make it a one-size-fits-almost-all turbo. Didn't he mention spooling his at around 2k rpms with the rack full closed? Personally I'm wondering if I could rig a way to control the rack's opening gradually to match boost or rpm, instead of just on-off from closed to open. Anyone know how the rack is controlled on the trucks? Like, is it an ECU function or is there a separate unit?

 

[Slippi84]

I think i should get one of those gaskets too. I didnt know something like that existed. Is it thin like a normal gasket? My turbo sits a little lower than id like as it is so i dont know if i could use it if its too thick. I didnt knife edge mine incase i decided to go divided header later.

Are the .5cm sized housings all non wastegated? All the ones ive seen are.

Yeah it's think and it's a metal gasket not a paper or cheap material that you have to replace every time you take the turbo off.

 

[interex]

Well I paid for my H2E lastnight. It should be here in a few days. I guess I'll see where this takes me.

 

[dsm-onster]

Please post wheel measurements.

 

[interex]

Please post wheel measurements.

Me? I'll post up any/all information I can gather from the H2E once it arrives.

 

[Cs4g63]

dsm-onster
Is there a diference between the HX-35 and the HX-35w?
I have a HX-35w and I always wondered what the "w" was there for.

 

[bluegs03]

doesnt the w stand for "wastegated"?