adam00

iTrader: (1)

which turbo would be better for a 81mm 9:1 comp. eagle rods, ram horn, ported b16 head, vitory x intake manifold, ls vtec ect.. looking to make upwards of 500whp on race gas
Also what size flange would be better t3 or t4? and what exhaust housing size would be the best 12cm^, 14cm^ or 18cm^

seanc520

iTrader: (1)

bump cause im wondering the same

92civicx

40

marcj

HX40 is going to have the T4 footprint, which obviously flows more exhaust. The compressor side is a big larger too and flows 72lbs. I think that should answer your questions.

if you're going to be drag racing only, i'd say go with 18cm housing and setup anti-lag to get those slicks moving.

extremeracer

The HX40 can be found with both T3 and T4 divided flanges

The 14cm^2 and 16cm^2 are T3 divided and the 18 and 19 cm^2 are T4

There are also 3 different versions (size and flow) of the HX40

The common 8 blade 58mm = 60lb/min SC61 GT35 equivalent

The rare 56mm is prob a bit less (between 52 and 60 lb/min)

The 6 and 7 blade 60mm = 69 lb/min GT4088 equivalent in flow

There are also 2 different turbine wheels - 12 blade and 10 blade (12 more flow but slower spool) (10 less flow faster spool)

For 500whp the normal 58mm should do the trick

If you want more and/or room for error go with the 60mm "PRO" 69lb/min version

Im personally going with a 60mm 6 blade HX40 with the 14cm^2 T3 divided housing on my 84mm LS/Vtec shooting for an easy 550whp

marcj

^ are you sure about those numbers? I've read the HX35 flows 60lbs on the dsmtuners thread.

extremeracer

Yes - i have most of the compressor maps for them

You right the HX35 7 blade also flows 60 lb/min even though its 54 or 56 mm (cant remember which) inducer the exducer is either the same or very close to size of the 58 mm HX40.

The 8 blade HX35 = 52 lb/min
7 blade HX35 = 60 lb/min
HY35 = 60 lb/min
8 blade HX40 = 60 lb/min
6 blade HX Super 40 = 69 lb/min
HX52 = 87 lb/min

adam00

iTrader: (1)

how is the h1c and what is there make hp?

seanc520

iTrader: (1)

so the 8 blade is the one you do not want then right? im shooting for 550-620whp max on a 10:1 84mm sleeved ls/vtec i dont want no super laggy **** though my sohc with a 50trim walked a 430whp civic hatch with a straight t04 on it....i was so far out off the punch he couldnt reel me back in time but then i was also brake boosting and he wasnt

extremeracer

Go do some searching on dsmtuners.com

The problem with the Holsets is that the DSM guys get great spool numbers from them because they use the 0.55 A/R Mitsu BEP housing or the slightly larger 0.70 T3 BEP housing (same as the S256 and S259 Mitsu Bolt-on turbine housings).

In order to achieve the same spool numbers from the original divided turbine housings - you HAVE to run a true divided firing order paired turbo manifold.

Many guys read about the great spool, bolt up a the stock divided turbine housing to a non divided (open) manifold and are then dissapointed and complain that the Holset turbo is laggy.

You have to remember that the Holset turbine housings are BIG and you need to make use of the divided setup that they were designed for. One or two of the DSM'ers have used the stock housings with divided manifolds and claim spool close to that of the 0.55 housing with much greater flow and HP potential.

There is anothe user on here that used a 16 cm^2 turbine HX40 (not sure which version) and ran a 11.00 with his '00 Si full street car

He had full boost (20 psi) @ 5500 RPM with the 16 cm^2 and non divided manifold on a B18C IIRC



You would need the HX 40 Pro 60 mm 6 or 7 blade compressor for your power goals