restricted_wrx

what is the best ihi vf turbo?

Imprezer

iTrader: (9)

Best for what? To look at?

Depending on what you plan on doing with your car, one can call a single IHI turbo "best" for your particular needs.

bone324

When I had a similar question I did a search and came up with quite a bit of info.

WRXncrew

iTrader: (6)

Try looking at the MRT VF Turbo Whitepaper... this has a good bit of information regarding the VF series turbos. Also, you can look here: http://www.wrxfanatics.com/index.php?showtopic=13098

xitonedefix

get the VF22 and huge injectors, and internals, and stand-alone, and run a lot of boost... that'll answer your question

WRXncrew

iTrader: (6)

Yes, the VF22 can also be had for a song... around $600. This is biggest IHI which, when ported and polished unleashes the full potency of the EJ20.

silentbob343

When can you expect boost to come on with an EJ20 engine and the VF22 ported and polished? I believe the stock WRX is 3300 RPM or thereabouts.

When can you expect boost to come on with a VF34 ported and polised as well? How much of a differencve does a P&P job make with most turbos?

I've heard that the VF22 is good for 320WHP and the VF34 for 300WHP. With accompying mods of course. Though I believe those numbers were a bit inflated. I've heard it's more like 300 w/VF22 and 275 w/VF34. How much power can a stock EJ20 handle before you need to beef up the internals?

Brfatal

I know someone who has a VF30 with 300 awhp. Stock internals.

silentbob343

wow was that on race gas or pump? What other mods would one have to do to get power like that. I see a lot of people on this forum getting bigger fuel pumps, VF34s, and STi injectors, but they don't get near that power. Is this most likely from lack of an ECU tune?

Brfatal

Well, his performance mods are:

1. Vf 30 Turbo
2. Turbo XS Stage 4 Unichip
3. Prodrive ECU
4. HKS Header
5. Perrin uppipe
6. Sti Fuel Injectors
7. Sti Intake Manifold
8. Sti Engine and Tranny Mounts
9. Sti Radiator Hose-red
10. Sti Short Shift kit
11. Mrt Turbo Back 3” Exhaust
12. Mrt Blow-Off Valve
13. Mrt Top Mount Intercooler
14. Mrt Intercooler Water Spray w/ Aluminum Tank in Trunk
15. Mrt Under-drive Pulleys
16. Samco Intake Pipe-blue
17. Samco Intercooler Y Hose-blue
18. Samco 9-Piece Hose Kit-blue
19. Zero Sports thermostat
20. Aem Cold-Air Intake
21. Supra Fuel Pump
22. Fan Mount Under Intercooler
23. Zero Sports Radiator Cover
24. Profec B Boost Controller
25. Knock Link
26. Denso Iridium Spark Plugs
27. HKS Full Circle Earth Ground Kit

silentbob343

Prodrive ECU

That procably has a lot to do with it. Other than that I don't see anything too crazy. Thanks makes me think my goal of 300WHP isn't that crazy after all.

WRXncrew

iTrader: (6)

What/whose dyno was this done on?

Brfatal

Not sure. Somewhere in TX. Maybe FIS.

Krinkov

iTrader: (21)

VF36, this is basically a VF37(twin scroll) but with ball bearing and titanium shaft