Holset Turbo on RB30

[leeroy_25]

I have only managed to find a couple of threads on here regarding these tubro's but no power outputs or anything.
Can anyone tell me if the HX40 would be a good single turbo to go for on an RB30 conversion?? What boost are they good for and what sort of power could it make? with suitbale cams and supporting mods? What about on an RB26?

Thank you
Lee

[Taiquri]

Originally Posted by leeroy_25

I have only managed to find a couple of threads on here regarding these tubro's but no power outputs or anything.
Can anyone tell me if the HX40 would be a good single turbo to go for on an RB30 conversion?? What boost are they good for and what sort of power could it make? with suitbale cams and supporting mods? What about on an RB26?

Thank you
Lee

I think HX 40 super is good. It is new model.
Hx40 is like a T78 greddy, but cheaper. hx40 super got new wheel technology and spool little bit faster.

Compressor map (old hx40, hx40super, hx52):


HX40 with 14-17 exhaust housing is good choice and works good with ~700hp

[leeroy_25]

Thanks for the Answers.. I will have to keep an eye out for the HX40.. How will I know if it is the correct housing size? are they not just one size as standard?
Thank you
Lee

[seve7]

holset turbos are an unusual turbo for small displacement performance applications. over in the states the hx40 is as an upgrade on the 5.9L cummins diesel found in dodge rams. head over to turbo diesel registry. those guys probably know more about holset turbos than anyone else. my buddy has an hx35 on his ram and makes over 2 bar on a 5.9L engine, so i dont know if you get good flow on a small engine at reasonable boost levels. and hes only making 320hp at the wheels, although its making 700ft lbs of torque.


from experience my friends, and i have never been happy with greddy turbos. i tend to stick with garett turbos.

[Taiquri]

Originally Posted by seve7

holset turbos are an unusual turbo for small displacement performance applications. over in the states the hx40 is as an upgrade on the 5.9L cummins diesel found in dodge rams. head over to turbo diesel registry. those guys probably know more about holset turbos than anyone else. my buddy has an hx35 on his ram and makes over 2 bar on a 5.9L engine, so i dont know if you get good flow on a small engine at reasonable boost levels. and hes only making 320hp at the wheels, although its making 700ft lbs of torque.


from experience my friends, and i have never been happy with greddy turbos. i tend to stick with garett turbos.

In finland. Half of the powerfull cars have holset turbocharger. It is very popular here. Hy35 with 8# exhaust housing making easily 600hv ~2L engine.

I am planning to put HX52 Pro to my gtr or Precision turbo. HX 52 PRO works like t51 hks (no ball bearings)

[Madden]

Can someone tell me how that compressor map works?

Whould like to know what it means.

[seve7]

the pressure ratio is basically the boost. 1:1 is no boost, 2:1 is 1 bar, and 3:1 it 2 bar. this is basically an compressor rpm map. the lines represent the rpm of the compressor wheel. the air flow is usually measured in lbs/min. its supposed to look like a topographical map, showing the adiabatic efficiency for given flow/pressure/compressor rpm. this one is very basic. but it somewhat illustrates the point.

[seve7]

Originally Posted by Taiquri

In finland. Half of the powerfull cars have holset turbocharger. It is very popular here. Hy35 with 8# exhaust housing making easily 600hv ~2L engine.

I am planning to put HX52 Pro to my gtr or Precision turbo. HX 52 PRO works like t51 hks (no ball bearings)

for whats available stateside hks turbos are very rare to see. its so much chepaer to go with a turbonetics, precision, innovative, or garrett, and the service and support is a lot better, with a lot more options and configurations for turbos.

[leeroy_25]

Thanks guys'. Keep the info coming!! I may have found a turbo so I will get some pictures and numbers for reference!

Lee

[SamuraiSam]

Originally Posted by Madden

Can someone tell me how that compressor map works?

Whould like to know what it means.

Purchase a copy of Maximum Boost by Corky Bell.

Also, read all 3 of these sections:

TurboByGarrett.com - Turbo Systems Tech Center

[SamuraiSam]

Originally Posted by seve7

holset turbos are an unusual turbo for small displacement performance applications. over in the states the hx40 is as an upgrade on the 5.9L cummins diesel found in dodge rams. head over to turbo diesel registry. those guys probably know more about holset turbos than anyone else. my buddy has an hx35 on his ram and makes over 2 bar on a 5.9L engine, so i dont know if you get good flow on a small engine at reasonable boost levels. and hes only making 320hp at the wheels, although its making 700ft lbs of torque.


from experience my friends, and i have never been happy with greddy turbos. i tend to stick with garett turbos.

Holset turbos are an extremely common turbo for small displacement performance applications. HX30's and HX/HY35's are commonly used on high flowing 4cyl engines down to 1.6L on Miatas and B-series Honda engines, and around the HX35 with 12cm and up housings on the SR20DET, RB20DET, 4G63, Subaru EJ20 and EJ25', K series Hondas and nearly any other small displacement engine you can think of. They are hugely popular (both HX35, HX35/40 and full on HX40 turbochargers along with Schwitzer diesel truck turbos on Volvo and BMW inline 6 applications as well. Holset turbos have an excellent reputation for advanced compressor wheel design, high efficiency, extremely beefy construction and cheap initial cost, part replacement, and rebuild kit ease of install and cost.

[seve7]

Originally Posted by SamuraiSam

Holset turbos are an extremely common turbo for small displacement performance applications. HX30's and HX/HY35's are commonly used on high flowing 4cyl engines down to 1.6L on Miatas and B-series Honda engines, and around the HX35 with 12cm and up housings on the SR20DET, RB20DET, 4G63, Subaru EJ20 and EJ25', K series Hondas and nearly any other small displacement engine you can think of. They are hugely popular (both HX35, HX35/40 and full on HX40 turbochargers along with Schwitzer diesel truck turbos on Volvo and BMW inline 6 applications as well. Holset turbos have an excellent reputation for advanced compressor wheel design, high efficiency, extremely beefy construction and cheap initial cost, part replacement, and rebuild kit ease of install and cost.

im not disagreeing with you at all, they are excellent turbos just that stateside its an unusual choice for cars i've seen them on a few but not often. i'd be interested in seeing if theres like a compressor map resource for them

[leeroy_25]

So Sam,
Would you recommend one for and RB26 or RB30 to be running around 60bhp?? I presume it would need to be an HX40??

Thank you
Lee

[Taiquri]

Originally Posted by leeroy_25

So Sam,
Would you recommend one for and RB26 or RB30 to be running around 60bhp?? I presume it would need to be an HX40??

Thank you
Lee

Hx40 super is good choice. 14 / 17 ex.

[SamuraiSam]

That "Super 40" looked excellent. Huge efficiency area there.