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Holset HX40 experience needed

xmlhack

xmlhack

Member
Joined
Dec 9, 2005
Location
Palm Bay, FL
Please. I would like to leverage your experience. Ive done the calculations now i need your trial and error experience.

What configuration of turbine and compressor housings and/or wheels do you recommend will get me to 650cfm (45 lb/min) the quickest using a holset hx40? I want it to spool fast and keep pumping until i let off.

Im working with a 93 b230, 86mm crank, custom plenum and big tube exhaust, and a stock dohc head.

Thank You
 
https://www.google.com/search?q=HX4...67PfAhVM71QKHYEZBjwQ_AUIDygC&biw=1600&bih=786

If you're ok with torque peak coming in after 6000rpm...

Only way to keep fast spool, HX40 on small displacement engine is keep the RPM HIGH!

Here's a HX40 on a Evo.
https://www.evolutionm.net/forums/e...stan-maperformance-2-1-holset-hx40-500hp.html
203426d1363304625-evo-8-pakistan-maperformance-2-1-holset-hx40-500hp-black-evo-29-26psi.jpg
 
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You'll probably have more fun with an hx35 or hy35. Not gonna lie, when I got my hx35 it spooled pretty slow even with the 12cm exhaust housing. Not TOO slow, like 3k coming on, 4k rocket ship mode.

With an hx40, yeah you'll have more room up top to make power. But peak numbers are a joke if it only makes the power for 15 rpm. I'm sure someone will come in and support the hx40 but this is just my 10 cents because my 2 cents is free (Eminem lyric)
 
It won?t make full boost until 4000-4500 rpm at least...with the 12 cm housing.

Just buy a 50 trim t3/t04e
 
My 11cm twin scroll seems ok (still running in so only had a few boot fulls) and I adapted the eBay header to twin scroll so that helps no doubt. I researched before buying/fitting as it’s best to learn from others experiences than ploughing on only to find out you assumed wrong. Plenty of folks run Holsets, so it May be a case of rebuilding with a different housing or selling on and reassessing what you want the turbo to give you. I’m not being arsey just my opinion old bean.
 
https://youtu.be/DL53ZFEHazk

This should be a quick clip of my 16v/ 11cm hx52 conversion on its maiden voyage just up the road and back last week. Nothing spectacularjust got into 1st and 2nd but shows it making a bit of boost with the hx52. Once I can get it on the road and try driving it in the higher gears I should have a better idea of boost vs rpm
 
Arewethereyet said:
https://youtu.be/DL53ZFEHazk

This should be a quick clip of my 16v/ 11cm hx52 conversion on its maiden voyage just up the road and back last week. Nothing spectacularjust got into 1st and 2nd but shows it making a bit of boost with the hx52. Once I can get it on the road and try driving it in the higher gears I should have a better idea of boost vs rpm
Click to expand...


Very nice!!! Sounds great!!!!. Please post more when u get time!!

Where?d you get the 11cm housing? What wheel?
 
I kept an eye out on eBay and an 11cm turbo turned up complete. Had a bit of play so rebuilt it. Wheels are standard, don’t know how many blades but could have a look.
 
xmlhack said:
Please. I would like to leverage your experience. Ive done the calculations now i need your trial and error experience.

What configuration of turbine and compressor housings and/or wheels do you recommend will get me to 650cfm (45 lb/min) the quickest using a holset hx40? I want it to spool fast and keep pumping until i let off.

Im working with a 93 b230, 86mm crank, custom plenum and big tube exhaust, and a stock dohc head.

Thank You
Click to expand...
If you have a properly built twinscroll manifold with 37mm ID piping and correctly dimentioned collector, the hx40 will have full boost at 4000rpm even with 16cm2 exhaust housing and above.

I have b21 with super hx40 with k cam and it starts building boost at 2000rpm and is at full boost at 4000rpm and has full power to revlimiter at 7200rpm.

I see this"if you want peak torque at 6000rpm..." so many times here on turbobricks lol.
 
volvo240e+t said:
If you have a properly built twinscroll manifold with 37mm ID piping and correctly dimentioned collector, the hx40 will have full boost at 4000rpm even with 16cm2 exhaust housing and above.

I have b21 with super hx40 with k cam and it starts building boost at 2000rpm and is at full boost at 4000rpm and has full power to revlimiter at 7200rpm.

I see this"if you want peak torque at 6000rpm..." so many times here on turbobricks lol.
Click to expand...

Nice! Thanks for the specs. Completely agree with your ?won?t spool? observation on TB. Post a picture of your b21 tearing it up in Iceland
 
Unfortunately I don't have any good pictures of the car however I have a picture of the manifold here:
https://drive.google.com/folderview?id=1qINeoQjm3cO9ujESwavir5Rh-J94j31h

We have a youtube channel(jonssonracing) were you can see the car: https://m.youtube.com/watch?v=aYse0wihlAk&t=71s

We recently tested the car with 2 bar boost pressure and we maxed out the 970cc bosch injectors.The car lost traction in 3 gear but unfortunately we broke one axle in the test run in a 3 gear pull.

If you want more details on the manifold I would be happy to help.
 
I am hoping to do a similar build soon. I am looking at the HE351CW which from my understanding is a HX40 compressor wheel with a HX35 turbine 9cm (I think) single scroll internally wastegated. There are at least 2 larger turbines that can be put in the HE351 one of which is the HX40 turbine wheel. I swapped a HE351 onto the 24v Cummins in my motorhome and was looking at the turbine upgrade for that as well.
 
It's my opinion that it's best to use twinscroll in 8v red block for all setups because then you can really get full benefits from any camshaft depending on exhaust housing size, however if you're not looking for max power and powerband then its not.

Is it possible to use a twinscroll exhaust housing on HE351CW?
HX40 with a small exhaust housing for example.
 
OP says he is using a "stock DOHC head". From what I understand the HE351 is a HX35 turbine wheel with a HX40 compressor wheel. The only housing I know of for the HE351 is the 9cm single scroll wastegated housing. You can put the HX40 turbine wheel in the HE351 but I don't know if there is a divided housing available for it.

It looks like a hx35/40 may be the way to go. It looks like you can get the HX40 turbine wheel and compressor into an HX35 which would give you access to some divided housings.

Sounds like the HX35 turbine housing may be able to be machined to fit on an HX40


http://turbolabofamerica.com/category/holset/holset-hx35/
 
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