Project EJ18T: VF39 to VF34

swapping out IHI VF39 to the ball bearing IHI VF34. re-did the turbo inlet hose using a newer-gen intake, mounting it under the intake manifold like the WRX. more to come...

1993 EJ18E shortblock
1994 EJ22T heads
JDM STi v7 Spec C IHI VF34 turbo
Apex'i AVC-R boost controller


see my build: http://www.rs25.com/forums/showthread.php?t=81773

Category:

Autos & Vehicles

Tags:

• 1993
• subaru
• impreza
• 1.8l
• ej18t
• wrx
• sti
• turbo
• ihi
• vf39
• vf34
• turbocharger
• gc8

[kutchabo]

Nice vid, i gotta question. I have a stock my00 wrx with only upgrades being 3" TBE, Upgraded fuel pump and a ecutek 1.5 tune. When and if my stock turbo ends up dieing what parts do i need to buy in order to install a vf34? Obviously i'll need the vf34 turbo, but what else is needed to ensure the car runs smoothly without any hassles? And as you may have thought i wont be the one installing haha, i'll get dad and some mates or my mechanic to help out :)

[tubejoe69]

@kutchabo The main things you will need for this upgrade are higher flowing injectors (mainly STI 550-565cc's), and a re-map of your fuel, timing, and boost settings. You already have an upgraded pump so you can skip that. Also, depending on what clutch you have now, you might want to get away from a stock unit as the VF34 will burn it out quicker than your stocker.

[Da1RiSiN1sMoKe]

How much did you get the 34 for?

[tubejoe69]

@Da1RiSiN1sMoKe 10 hours of doing an FPGreen, injector, and clutch swap on a WRX wagon. In other words, free. Only to beat the very wagon that I got the VF34 from, with the FPGreen I helped install. I wish I had caught that on video then. FWD does help alot.

[TwitterApplets]

Cool. Yeah I was asking you because I have a VF39 that I'm going to be using on a 2.2L Mazda engine. Mine is a stump puller (lots of torque) and has an 86mm bore with a 94mm stroke. The bad part is that it has a 12v sohc head. One thing that I'll be doing though is using a VF22 P20 exhaust housing. The difference between the P18 (VF30, 34, 39) and P20 (strictly VF22) is similar to a .48 and .63 from Garrett.

[tubejoe69]

@TwitterApplets If only you had a 16V head, it'll help alot with overall spool and power on the P20 housing.

[Turbos4Sale]

Nice video!

[TwitterApplets]

It's a SOHC 12v head though with an open differential and horrible torque steer- FWD too. Stock they make 145hp and 190 tq. My last dyno was 233hp and 343 tq. I'll be using the VF39 CHRA but the P20 exhaust housing.

Check out- add and subscribe to youtube. com/ProjectCarTV if you're interested. I'll be doing the build over the summer. I'm on NASIOC as SixSick6.

[tubejoe69]

@TwitterApplets I'd rather you go with the VF22 for a 2.2L. The extra displacement will push the P18s to max very easily. The VF22 will feel more at home for you.

[tubejoe69]

@TwitterApplets If you're talking about just spool during cruise, the VF34 can be heard at 2300 rpm on my tune compared to 2750 on the VF39. When hammering it down, full boost is achieved at 4400 rpm on both turbos but the VF34 hits harder and gets there a bit faster.