Holset Turbos, PART 6

[need2boostpsi]

man with all these holset pages someone should sort through them and make a "HOLSET FAQ" and sticky it.

 

[JusMX141]

I say it's time Holset gets it's own sub-forum under the Turbo Tech category.

...although if such a sub-forum were created, it should be accessible to new members as well. I believe there are tons of folks out there that can offer useable information on these turbos but they are not DSMers and will never pass the 50-post count necessary to be a proven member and post here.

For example, member SR20drag has tons of useful information from his HX35-powered SR20 thread in The Hangout, but he can't contribute to this thread or any other in the Turbo Tech section.

 

[dsm-onster]

Actually, while browsing around, I found this:World Tech Engineering Co.,Ltd.

Look at the sizes on HX-40 and HX-40R, if judging from their HP ratings, the 8balde is just 5% below the 6blade, so theoretically, if 6blade flows 70lb/min, 8blade would be aroen 67lbs/min. Not to mention, that the 6blade has significally bigger exducer on the comp. wheel. Don't forget, that the power jumped significcally on the FP turbos, making the comp. wheel exducer from 82 to 86mm in the 3586 HTA turbos. What is the exducer size on 6blade/60mm wheel?

Per that website, their 8blade hx40 is a 60mm 8blade, probably a compressor wheel identical to yours, which isn't very common. You ahve a 60mm 8blade hx40, correct? The common 8blade hx40 has a 58mm inducer. We have the compressor map for the hx40r (pro, super 40) which shows 68lb/min. And we have the compressor map for the standard hx40 which shows about 60lb/min. This is the first place I've seen that has given a horsepower rating on the 8blade 60mm hx40 compressor wheel. It looks like the ratings are for gas motors and there ain't no what no diesel can make 600whp with an hx40. It can make 1500ftlbs of torque with one, but not that much hp.

As well, performance turbo shops rate/sell turbos based on compressor flow. It's pathetic! It takes two to tango as we know: a huge compressor means nothing with out a turbine that will exit all that potential flow. These could be compressor ratings.

Remember there are 2 different hx40 turbine wheels. A 10 blade wheel that flows a little less but spools a little faster. And a 12 blade (the most common) that flows more but spools a little slower. The 10blade comes with the super hx40 from holsets factory. Many however upgrade a common hx40 with the 12 blade turbine wheel, or turbo diesel shops build their own hx40s from holset parts and use the 12blade wheel with the pro/super compressor wheel.

 

[kawboy]

I'll try my luck cutting the gasket, but that center ridge between the wastegate and outlet is very thin when cut which worries me of the exact problem described above!

I'll probably cut it, copper spray, and ensure the o2 housing bolts are cranked!

Still unsure of how well the ultra copper would seal if the surfaces arent 100% flat. I have used it soley as a "gasket" between turbo and mani on a SR20, it melts away the globs but still seals until disassembled.

Feel free to keep posting what works and what doesn't..

 

[GST95]

Interesting I've never heard of a 17cm^2 hx40 turbine housing. I have a 19cm^2 t4 on mine.

I had seen one when i was experimenting with the wh1c, but hadnt seen one since. I didnt think i would find one. I didnt want to go with the 19cm t4 housing and was just gunna make an adaptor to bolt up my 18cm t3 housing. Ill confirm that it wasnt just a typo when it shows up.

Another plus about it is that it has a damaged compressor wheel and i have a good spare 7 blade wheel and cover, so i will have a spare hx40.

 

[nfernotalon]

Here are some pics of the HX35 Im going to use. Its gonna get sent off to be rebuilt by JSMX141 real soon. Im still debating whether or not to use the t3 manifold with it or get the BEP DSM housing.

 

[GST95]

I wonder the kind of spool you can get by using this product designed by Sound Performance (supra based company)

Sound Performance Quick Spool Valve Sound Performance Online

I mean the design is pretty simple and anyone can make it if you know a welder.

Ive seen this before, but the problems that i see is that it can only be used with a non-divided manifold otherwise it would totally shut off 2 cylinders. Because of that i think that it makes it not worth the money that they are asking for them and could be better used by putting it towards a divided manifold. Its an interesting idea, but i think a twin scroll setup would be alot better all the way around.

 

[need2boostpsi]

so does anyone have a compressor map for the 56mm 6-blade HX40W? how does it compare with the the 56mm 7-blade HX35W? how about the 8-blade HX40W?

 

[kraka]

Did a bit of test fitting with the HX40 this week. I will be bolting the turbo to an SBR cast manifold with the EWG provision, but I already had my EvoIII manifold bolted up from the 50trim setup so I used that assuming the SBR will fit similarly.

"Hmmm, where does this go"

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It's hard to show how much larger the Holset is compared to the old 50trim. You only barely notice the 4"/2.5" vs. 3"/2.5":

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BEP vs. PTE

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Surprisingly, the giant Holset compressor housing cleared both the block AND the water pipe without denting!

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However, the compressor outlet comes awkwardly close to the front motor mount, and I can already foresee clearance issues with the FP 4" Intake:

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[nfernotalon]

What are you gonna do about the clearance issues?^^^^ Those are some crazy vacuum lines and the little coolant line too.

 

[90CherryBomb]

This may be a stupid question, deserving a "search" reply...but I couldn't find anything.

Has anyone found a reputable place that rebuilds these turbos relatively cheaply? I have a 6-blade HX40 that blew on the highway last night during a pull, now it makes no boost and smokes bad.

 

[nfernotalon]

Send jusmx141 a private message, hes in this thread up a few.^^^^

 

[alansupra94]

Ive seen this before, but the problems that i see is that it can only be used with a non-divided manifold otherwise it would totally shut off 2 cylinders. Because of that i think that it makes it not worth the money that they are asking for them and could be better used by putting it towards a divided manifold. Its an interesting idea, but i think a twin scroll setup would be alot better all the way around.

O I am not telling you guys to pay that much for that thing. For god sakes its a flange and a actuator. You can make that for like $20 tops.

 

[GST95]

O I am not telling you guys to pay that much for that thing. For god sakes its a flange and a actuator. You can make that for like $20 tops.

You will have more then that into it unless you got some of the materials for free. There are a couple of issues that i see over price. If you make it yourself you have to be very precise on how the rod goes through the flange. If it leaks at all it will be pre-turbo and increase lag. You would also want to use something that wouldnt rust for the rod and the flange so it wont seize up. This thing will also create alot of turbulence when its closed.

Why not just use a VNT holset and have the same effect and its already integrated into it?

 

[kawboy]

Thats actually a fairly small compressor housing

My HX-40 compressor housing required denting the waterpipe on my 7 bolt to nearly half its size. With a FP Race

 

[turbodsm18]

I honestly dont wont to read through all the threads so Im gonna post this here.....Getting ready to get my setup back together.....

Hx40 - 7 blade billet wheel
Oil line fed from oil filter housing
No balance shafts
7 bolt motor - Relief hole NOT ported

What do you recommend me doing as far as a oil supply....I already have the line to use from the ofh, but I want to know If I need a restricter or not...Or should I go ahead and pull the ofh and port the relief hole....I dont really want to do that though....

Please, help is appreciated...should have some pics up soon...

-Kevin-

 

[toofast82]

I honestly dont wont to read through all the threads so Im gonna post this here.....Getting ready to get my setup back together.....

Hx40 - 7 blade billet wheel
Oil line fed from oil filter housing
No balance shafts
7 bolt motor - Relief hole NOT ported

What do you recommend me doing as far as a oil supply....I already have the line to use from the ofh, but I want to know If I need a restricter or not...Or should I go ahead and pull the ofh and port the relief hole....I dont really want to do that though....

Please, help is appreciated...should have some pics up soon...

-Kevin-

It may be kind of one or the other. You will most likely need the restrictor with the relief hole unported. You may still need a restrictor with it ported also, and you might not. Do you have means to hook up a gauge to verify what pressure you're getting? This will allow you to "tune" your op for your setup. Its kind of hard to say

 

[turbodsm18]

It may be kind of one or the other. You will most likely need the restrictor with the relief hole unported. You may still need a restrictor with it ported also, and you might not. Do you have means to hook up a gauge to verify what pressure you're getting? This will allow you to "tune" your op for your setup. Its kind of hard to say

Yes I have a mechanical oil pressure gauge that will be off of the ofh also.....Its really not a problem if the best thing is to port the relief hole, its just one more thing on the list.....

The thing is, I would rather not start the car just to see what the pressure is and then have to pull the ofh off and port the hole and reinstall it.....I wanna just do it all now and be done with it.....

-Kevin-

 

[95burgundyesi]

So I tried to tune tonight with my holset hx35, at 22 psi I ran out of injector hitting 103% duty cycle

I could of sworn I have seen people making 25-27psi on pump with 780s and 720s. Goes real lean once I hit 5500rpm and above. No knock but maxed out around 22-23psi. And the thing creeps up top with my BEP housing to about 22psi. I am sad, posting the logs on LINK forums to see if I am doing something wrong, I didn't expect the duty cyle to hit that high at 22psi.

 

[dsm-onster]

I'll take a look on the link forums and see what can be done. I suspect a boost leak. You've mentioned that your bolton hx35 spools slow.

. . . I don't see your thread there. ???

 

[toofast82]

So I tried to tune tonight with my holset hx35, at 22 psi I ran out of injector hitting 103% duty cycle

I could of sworn I have seen people making 25-27psi on pump with 780s and 720s. Goes real lean once I hit 5500rpm and above. No knock but maxed out around 22-23psi. And the thing creeps up top with my BEP housing to about 22psi. I am sad, posting the logs on LINK forums to see if I am doing something wrong, I didn't expect the duty cyle to hit that high at 22psi.

What is your a/f? Can you post the log here?

 

[kawboy]

I honestly dont wont to read through all the threads so Im gonna post this here.....Getting ready to get my setup back together.....

Hx40 - 7 blade billet wheel
Oil line fed from oil filter housing
No balance shafts
7 bolt motor - Relief hole NOT ported

What do you recommend me doing as far as a oil supply....I already have the line to use from the ofh, but I want to know If I need a restricter or not...Or should I go ahead and pull the ofh and port the relief hole....I dont really want to do that though....

Please, help is appreciated...should have some pics up soon...

-Kevin-

.065 restrictor will work good

 

[95burgundyesi]

Log should be up soon, my buddy has the log on his computer, and he will throw it up when he wakes up.

The spool was fixed and I see 20psi+ by 3900. The wastegate arm fit on there too loose and needed to be brought back a couple turns. Spool isn't the issue

 

[kawboy]

20 PSI by 3900 still seems kinda slow..

Theres people logging 25psi by 4100 on a HX40

 

[95burgundyesi]

Well I don't know the exact point where it hits full boost, starts building boost at 3k and by 3500 the needle just slams past 20 so I don't think it is too bad. I am going to have to do a boost leak test and double check my t-bolt clamps and stuff.

I just was like WTF when the 780s maxed out. I am going to giving him a wake up call so he can get that log up.