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Old 11-09-2007, 05:43 PM   #4
Scooby South
Subtly Outspoken
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2015 STX WRX
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)


Originally Posted by xdrian View Post
good to know ! let them know that the 43 has a bigger wastegate
Noted...Topspeed will probably be doing my Hopefully I will see some good numbers..

Originally Posted by Fuquad View Post
This is awesome information! I, too, have been looking for some decent comparisons of the 39 to the 43 (as I run a 43 on my FXT). I've been concerned that maybe it was not a better idea to have bought the 43 instead of the 39.

I was wondering if there were significant differences in regards to tuning the two.
I don't think it will "tune" any different...just basically have dial in the boost....whereas before I had to throw timing at it to maintain anything up it might affect that somehow...We will see after its all done.....I basically had to let the ECU relearn before I can go in and adjust Boost..right now...its still overboasting in 4th/5th like 24lbs....Now that I am thinking about it...It probably will affect the least on top....I will post the results after the re-tune ..

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