HX40 19cm2 housing machined to fit HX52 with quick spool valve

[LandSpeed-DSM]

I'm bottom mounted with a thicker than stock radiator.

It's tight.

The 16cm2 housing, depending on where Holset is making it's measurements is between 1.15-1.25A/R

Not to clog up this thread, but here's my setup as of a few weeks ago and its only gotten more crowded:

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[Archer Fabrications]

Holy crap no way man!!! I'm running a koyo and it's huge that would be..... Severely tight. I need pix of this.

 

[bastarddsm]

I had the chance to buy one of these for 200 bucks... But i was advised not to because it would barely fit. Are you guys using top mount manifolds? Or half rads? My hx40 is pretty tight as is with the .55 bolt on. I am thinking I'll have a challenge with the .70AR t3, so how the f would you fit a .86+ housing in there with that huge of a compressor cover for the HX-5x series

Put a 67mm wheel in your HX40. It'll be just fine. Low drive pressure is over-rated.

 

[LandSpeed-DSM]

^^Added pics

I don't know bastard, I'm pretty sold on the idea after my experiments on the S200sx.

Wouldn't surge be an issue potentially with a 40 turbine driving a 67/99 comp wheel? I would think so..

Although my tastes are a bit different than most I suppose. Lag/Response is not a primary concern because I like my builds to pull like a freight train through the redline and not fall off.

So if I don't hit target boost till 5.5k thats fine because I like to roll through 9k+ at full steam.

 

[Boostdriven]

I would like to know what 67mm wheel you can put on HX40, the shaft thickness on a HX52 is larger then HX40 so you couldn't just swap that wheel in.

I don't think low drive pressure is over-rated. Think about how the engine works. As one piston is intaking air the other one is exhausting. So if you have 30 psi coming in but 25 psi going, that's 5 psi more pressure pushing that piston down vs the exhaust pressure, plus the less drive pressure you have to cooler your egts will be.

I have been talking to Bob at BAE turbosystems and he said that they are working on a turbo right now that uses a big shaft like HX52 with HX40 exhaust wheel and 67/98 and 72/98 compressor wheel. That's something you would be able to just bolt in to your HX40 housing. I'm not sure if its ready to be sold but he did say that he got one on his shelf as a prototype.

BTW LandSpeed, very nice looking set up. What intake and throttle body do you have? I'm still rolling a stock 1G none turbo throttle body, maybe that's a next thing I should upgrade.

 

[Archer Fabrications]

Pssh plenty of space in a 1g I'm shooting for the 2g hx40 record.

 

[LandSpeed-DSM]

Thanks!

JMF Drag Manifold with a (temporary) 1G throttle-body. Plan is to step up to a larger throttle in the next 12 months.

I'm using 3" IC piping, so its far from ideal. I know of at least a couple folks putting down 800+ awhp with that TB though, so it should suffice for now.

urban - I should point out that there is a large oil cooler mounted down on the drivers side as well

 

[forcefed86]

What a cool project! keep us updated as you test it more.

 

[Boostdriven]

Thanks!

JMF Drag Manifold with a (temporary) 1G throttle-body. Plan is to step up to a larger throttle in the next 12 months.

I'm using 3" IC piping, so its far from ideal. I know of at least a couple folks putting down 800+ awhp with that TB though, so it should suffice for now.

If possible I would switch to a 1g none turbo tb that way at least you will be able to run your 3" pipe all the way to the tb and use a 3"-2.75" coupler. This way you will eliminate that 2.25" ID 2g tb elbow. Nevertheless I like your set up.

 

[LandSpeed-DSM]

That's certainly tempting, but the money I would put into that I am going to save for a unit like the S90, Boomba, BBK, Accufab or similar.

I am not especially happy with the 2G elbow, but I had it on hand and it will have to do for now. We will be cutting all of that off ASAP for a better elbow and TB!

How much if at all does the 19cm housing move the HX52 in the bay?

/Sorry, I feel like ive cluttered your thread.

 

[dsmcurse]

so which TB do plan on upgrading to? id like to figure out the best and easiest "junk yard" upgrade TB that is worth the time to go find. reason i have stuck with a mitsu (1G N/T TB) is for the fact of keeping mits electronics like TPS and IAC

i here mustang TB is one that can be made to work with very little work but i dont know if this is true? i was thinking a Honda Prelude VTEC TB might be good "poor-man's upgrade" getting one for me would be easy for me, i here theyre actually pretty damn bug, plus honda IAC valve probably the best stock one out there, im just not sure if the hassle of doing it would be worth the upgrade over my ported 60mm N/T TB

maybe buying a big daddy 75mm or 80mm TB would be the way to go? but then agin? i wonder about those two sensors?

 

[Boostdriven]

Sorry, I feel like ive cluttered your thread.

No worries, I don't own dsmtuners website or their hard drive space

 

[bastarddsm]

^^Added pics

I don't know bastard, I'm pretty sold on the idea after my experiments on the S200sx.

Wouldn't surge be an issue potentially with a 40 turbine driving a 67/99 comp wheel? I would think so..

Although my tastes are a bit different than most I suppose. Lag/Response is not a primary concern because I like my builds to pull like a freight train through the redline and not fall off.

So if I don't hit target boost till 5.5k thats fine because I like to roll through 9k+ at full steam.

Well your FWD, so a big turbo that came on hard and early would just result in tire spin.

I would like to know what 67mm wheel you can put on HX40, the shaft thickness on a HX52 is larger then HX40 so you couldn't just swap that wheel in.

I don't think low drive pressure is over-rated. Think about how the engine works. As one piston is intaking air the other one is exhausting. So if you have 30 psi coming in but 25 psi going, that's 5 psi more pressure pushing that piston down vs the exhaust pressure, plus the less drive pressure you have to cooler your egts will be.

I have been talking to Bob at BAE turbosystems and he said that they are working on a turbo right now that uses a big shaft like HX52 with HX40 exhaust wheel and 67/98 and 72/98 compressor wheel. That's something you would be able to just bolt in to your HX40 housing. I'm not sure if its ready to be sold but he did say that he got one on his shelf as a prototype.

I wasn't saying that lower drive pressure won't make power, I was infering that high drive pressure isn't a deal breaker. A 67mm wheel in a HX40 would be good for 8-900, and it packages nicer. Why run a huge monster with more lag to only make 100 more.

At the same boost level (35) my HE351 makes 50whp more than the HY35 did, its got like 65psi drive at 9000. Sure I could bolt on a HX40 with a big housing at make 700 at this boost level, but then I loose 1000rpm of power-band, and have to ditch the stock fans and have a setup that is harder to work on.

My next turbo will be a duramax VGT turbo, or a HX40 turbine and 62 or 64mm wheel in the HE351 housings.

 

[swifteagle]

Dang landspeedsm That hx52 setup is looking awsome.Boostdriven I like your ideas on the housing and the quick spool valve us gear head's are always trying to make some thing better!

 

[Boostdriven]

So I tried to tweak with that mbc for the spool valve and turns out I can't crank it up much higher then 25 psi. My valve actuator is progressive so it starts to open at 25 psi and is fully opened by 30 psi. If I crank it up to 29-30 then the valve don't fully open till about 35-36 which is right at about peak boost but I would like the valve to be open fully a little before that so I just left it at 25 psi.

I looked through my previous logs from my bastard HX40 (bae 62mm compressor wheel/garrett .84 housing) and the spool on the HX52 is not much slower then that HX40, around 150 rpms. With that HX40 at 35 psi at 8000 rpms my drive pressure was about 30 psi, with that HX52/HX40 housing at 35 psi I have 25 psi of drive pressure at 8000 rpms.

Now I don't know how this compares to some of your guys's data but boost response on this HX52 between shifts seems to be good. Going from 2nd in to 3rd, from the time I hit full throttle to full boost is 1 second and from 3rd to 4th is just under a second.

I would like to see how this compares to some of you guys that are running HX52 or another turbo close to that size. If you don't mind can you post some of your data.

Overall I would have to say I'm very satisfied with this set up, it works better then I predicted. I'm planning on going to a dyno here in about a month so I'll definitely share the results with you.

 

[LandSpeed-DSM]

So I tried to tweak with that mbc for the spool valve and turns out I can't crank it up much higher then 25 psi. My valve actuator is progressive so it starts to open at 25 psi and is fully opened by 30 psi. If I crank it up to 29-30 then the valve don't fully open till about 35-36 which is right at about peak boost but I would like the valve to be open fully a little before that so I just left it at 25 psi.

I looked through my previous logs from my bastard HX40 (bae 62mm compressor wheel/garrett .84 housing) and the spool on the HX52 is not much slower then that HX40, around 150 rpms. With that HX40 at 35 psi at 8000 rpms my drive pressure was about 30 psi, with that HX52/HX40 housing at 35 psi I have 25 psi of drive pressure at 8000 rpms.

Now I don't know how this compares to some of your guys's data but boost response on this HX52 between shifts seems to be good. Going from 2nd in to 3rd, from the time I hit full throttle to full boost is 1 second and from 3rd to 4th is just under a second.

I would like to see how this compares to some of you guys that are running HX52 or another turbo close to that size. If you don't mind can you post some of your data.

Overall I would have to say I'm very satisfied with this set up, it works better then I predicted. I'm planning on going to a dyno here in about a month so I'll definitely share the results with you.

I hopefully will have an excess of data to share within the month.

Any chance you know about how much the 19cm hx40 housing moves the turbo vs. the 16cm stock housing?

How big is the discharge size of the 19cm housing, would you be able to run a 4" ID DP?

Well your FWD, so a big turbo that came on hard and early would just result in tire spin.



I wasn't saying that lower drive pressure won't make power, I was infering that high drive pressure isn't a deal breaker. A 67mm wheel in a HX40 would be good for 8-900, and it packages nicer. Why run a huge monster with more lag to only make 100 more.

At the same boost level (35) my HE351 makes 50whp more than the HY35 did, its got like 65psi drive at 9000. Sure I could bolt on a HX40 with a big housing at make 700 at this boost level, but then I loose 1000rpm of power-band, and have to ditch the stock fans and have a setup that is harder to work on.

My next turbo will be a duramax VGT turbo, or a HX40 turbine and 62 or 64mm wheel in the HE351 housings.

The response should still be pretty quick if you are moving enough exhaust gas after the shift to light it again. But in general I agree with this.

The s200 was still very responsive in the twinscroll T4 vs. the bolt on housing, and I've done enough chassis work along with the LSD that I was still able to get traction most of the time, even in FWD.

Electronic boost control will be coming in handy this time around though, and sooner or later a proper suspension approach.

 

[Boostdriven]

I hopefully will have an excess of data to share within the month.
Any chance you know about how much the 19cm hx40 housing moves the turbo vs. the 16cm stock housing?
How big is the discharge size of the 19cm housing, would you be able to run a 4" ID DP?

What do you mean moves the turbo, are you talking about how it fits the turbo in the engine bay?
Well it places the turbo relatively the same as 16cm stock housing, the only difference it moved it about an 1/8-1/4 of inch towards the driver side which gave me just enough room to clear the engine mount.

The discharge on the 19cm housing is 3" v-band, I welded it on there. Originally that housing looked ugly as sin. It was internally gated and I think it had a 5 or 6 bolt flange on the discharge side of it. There were few ears off the side of it as well where the wastegate actuator bolted up. After about 3 hours of grinding and cutting it ended up looking like what you see in the pictures.

Originally I cleaned it up to test it with my spool valve on the HX40 turbo and since my down pipe had a 3" v-band I welded the same thing to the discharge side of the housing but anything could be welded to it.

Just edited my post #46. I read my log wrong the first time when I posted that post. In 3rd gear at 33 psi of boost from 70-90 is 1.2 seconds not 1.9 like I originally posted. From 80-100 is 1.1 seconds.

 

[Boostdriven]

Going to dyno the car this Friday, that's the plan anyways. Got the word from Monty the auto instructor at the college that everything should be set up and ready tomorrow. I'll probably start a new thread on Friday posting the results for those who were waiting in them.