vf 34 or vf39?
Thread Starter
Registered User
iTrader: (1)
Joined: Oct 2004
Posts: 241
From: Sacramento
Car Info: 07SubiWRX
vf 34 or vf39?
i have a 2002 wrx with a fmic, 3 inch turbo back exhaust, pulleys, possum link em, & vishnu up-pipe an i want to get a bigger turbo. i've read about both vf 34 & 39 an i want to know which is better for max horsepower at 5000 to 7000 rpms. which one is better for both drag racing/ an auto-x. i will put sti injectors, fuel rails, fuel pump, port/poslish my intake mainfold also, an tune it accordingly. i want everyones opinion on which one is better.
Registered User
Joined: Mar 2005
Posts: 150
From: HAWAII
port and polish a vf 34 or a vf 39 both are good
Originally Posted by Jizzo_02SubiWRX
i have a 2002 wrx with a fmic, 3 inch turbo back exhaust, pulleys, possum link em, & vishnu up-pipe an i want to get a bigger turbo. i've read about both vf 34 & 39 an i want to know which is better for max horsepower at 5000 to 7000 rpms. which one is better for both drag racing/ an auto-x. i will put sti injectors, fuel rails, fuel pump, port/poslish my intake mainfold also, an tune it accordingly. i want everyones opinion on which one is better.
check out this thread by unabomber from nasioc.com - http://forums.nasioc.com/forums/showthread.php?t=555332
Guest
Posts: n/a
i'm no expert. the 34 is bigger. the 39 will spool faster. the 39 does not have the 35's hotside. the 35 has a p15 (small) the 39 has a p17 and the 30/34 has a p18 or 20 or something (bigger). and someone feel free to correct me if i'm wrong but i think they all have the same cold side. i know the 30/34/35 do. (therefore a 34 with a 35 turbine is a 35.) fastest to slowest spool 35,39,34,30 : highest to lowest top end 34/30,39,35
Last edited by autowagon; Apr 2, 2005 at 01:43 PM.
Registered User
Joined: Jun 2005
Posts: 97
From: Easton, MA
Car Info: '02 Stage 2 WRX
It seems like having more power in the top end would mean sacrificing some low end power... which wouldn't be good for AutoX useage. I've got a VF39 (not installed yet) but have read through the debates many times before. It seems like the VF34 has a bit more top end kick, whereas the VF39 spools up quicker. Apples vs. Oranges. Only downside to the VF39 is that Cobb doesn't have a map for it for the AP (if you're looking for one), but you can get a Protune for it (which is what I'll be doing)