Hx35

[Koikoinui]

Hello I was interested in buying the Hx35 turbo. I wanna build a 500 hp to 600hp car. My question is will the hx35 turbo get the job done?

 

[92AWDHX40]

Lots to be said here find the holset thread here lots of information on the holset.

 

[boost97gst]

Go with the 6 blade 40.

 

[iBoostDSM]

Hx35 can definitely get you over 500whp in t3 form, but Hx40 would get you closer to 600 easier. I personally have a bolt on hx35 making 400+ There's a lot of info on holsets, so start reading.

 

[crash89]

Here, since these guys were too lazy..

http://www.dsmtuners.com/threads/holset-turbos-faq.362444/
Theres 9 of these threads, lots of reading here. http://www.dsmtuners.com/threads/holset-turbos.145691/
http://www.dsmtuners.com/threads/holset-turbos-results-only-complete-installed-systems.313476/
http://www.dsmtuners.com/threads/manifolds-that-work-with-holset-hx35-hx40.341834/

 

[c2ypt1c]

From the first post of the holset thread:

HX35:

The 8blade hx35 has a 56mm compressor inducer. This is found on 1995-1998 cummins manual pickups. The compressor flows 52 lb/min according to the compressor map. The bolton BEP housing (0.55 a/r) is enough to push the limit of the compressor. There's several 500whp 8blade hx35 cars out there with the bolt on housing. It reaches 20+psi by 3500rpms in 3rd with 272 cams. Smaller cams would equal a faster spool speed in most cases.

The 7blade hx35 has a 54mm compressor inducer. This is found on the 1999-2002 cummins manual pickups. The compressor flows 60lb/min according to the compressor map and logged results from a member here. The bolton BEP housing with the hx35 turbine wheel do not SEEM to have enough flow to really reach the potential of 60lb/min. But many have logged over 50lb/min so far and seen 500whp. The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

Essentially what this boils down to is:
(8blade hx35) 52lb/min = 520hp
(7blade hx35) 60lb/min = 600hp

Keep in mind that these flow values represent the (near) full capacity of the turbo. Like others have said, achieving 600hp will be easier on a 6/7 blade hx40 (69lb/min).