Hx50..

[euro_urs4]

just want your guys opinion on a holset hx50 h2e turbo, owner says it has a small 17 exhaust housing (not sure if that helps), guy is selling this just wanted to know what you guys think of this turbo as far as power and performance, approximate spool time? And possible comparsion to the hx40. Thanks

[quattro84]

Compressor ranges from 62/98 to 71/108 capable of 0,75kg/s => airflow equals around 900HP max. Pressure ratio's up to 4 so high boost is possible.
Turbine something like 85/75mm. Hotside is one of (if not) the smallest hotsides available, the newer Pro versions have 16cm^2 housings. Bullseye power told me they are making new stainless hotsides for these models in the future.
Spool time? hard to tell.

[euro_urs4]

thanks for the info appreciate it, im still puzzled weather to use a hx40 or a hx50 im looking at 500 whp for sure if not more what would you guys suggest

[Jamo]

hx40, with a turbo you want to be running as close to the effeciency limit as possible

hx50 be a good drag turbo but street / track? 900 bhp? not realistic

[euro_urs4]

hx40, with a turbo you want to be running as close to the effeciency limit as possible

hx50 be a good drag turbo but street / track? 900 bhp? not realistic

very well said clears up alot of things thanks so much

[TurboTransAm]

just want your guys opinion on a holset hx50 h2e turbo, owner says it has a small 17 exhaust housing (not sure if that helps), guy is selling this just wanted to know what you guys think of this turbo as far as power and performance, approximate spool time? And possible comparsion to the hx40. Thanks

The HX50 is also physically larger then the HX40 which may or may not be a mounting issue. A 17cm housing is quite small for one of these units (they are diesel turbos). I think they came with 67mm and 72mm compressors... although Holset are notorious for mixing and matching different combo's under the same name. You'd have to measure the wheels to be sure. There's a Volvo 740 on youtube running an HX50 if you do a search... could do with 4WD

I'd say from experience that a 60mm HX40 would be savage. If you want to go bigger there's the HX52 which has a weird turbine size / fitting and the same compressor as an HX50 or HX55. All these turbo's will run, it's just a matter of how drivable you need the result to be...

[quattro84]

hx50 900 bhp? not realistic

It is. They make over 510hp on trucks with margin so figure out what that does on a petrol engine.
The Endless-R versions reach those numbers on Japanese cars.

[Jamo]

It is. They make over 510hp on trucks with margin so figure out what that does on a petrol engine.
The Endless-R versions reach those numbers on Japanese cars.

hx50 be a good drag turbo but street / track? 900 bhp? not realistic

You've misunderstood what I've posted, 900 bhp is unrealistic figure for use in a street / track car not that the turbo cant make that power

[quattro84]