vf 34 or vf39?
03-29-2005, 03:03 PM
#1
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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.
03-31-2005, 12:00 AM
#5
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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
04-02-2005, 01:37 PM
#8
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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; 04-02-2005 at 01:43 PM.
11-12-2005, 11:57 AM
#15
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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)