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Old 09-27-2008, 12:25 AM   #1
Junior2JZ
Scooby Guru
 
Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies all over
Vehicle:
10.8 XT+9.2@155 GR+
9.1/157mph 2015 STI

Default Not a subie, GTR TUNING FUN

Today I had the opportunity to team up with John@Cobb and tune my first GTR. Let me start by saying this car is everything they say it is, and then some. From top to bottom, the car is just an amazing machine. It just has this nasty attitude that we all love in our cars. The tone from the stock car was just amazing and I cant wait until the owner gets his exhaust on the car.
Some background on the car.... Well it is 100% bone stock. Car was running in the 11.7-11.8@120-121 range. The owner has a wheel bearing company that makes ceramic BB units for all cars... he made a set for his shiny new GTR and went 11.4@123 after the bearing swap.
The car base lined @ 440/438 stock. After some fiddling with the AFR, Timing and cam timing we were able to get 469.8/457. All the gain was in the middle and upper power band, which is right were we want it. There re ranges of 45+whp gains in the mid range, so we were very happy with that. Peak numbers didn't really reflect the power output. We cant wait to see what it runs now.... then add in test pipes, more boost and cat-back.. I think it might just be able to sneak into the 10s with just those mods. After that the owner has already started planning the turbo upgrades!
Sorry about the wet dyno chart.. I dropped it on the way home...
If you look at the AFR you can see we added a bunch of fuel down low, from the factory its in the 13s.. If you follow the TQ gains which you can actually see, the HP graph looks the same over the baseline.
We should have some track numbers this coming week.
I really want to thank John @ Cobb and COBB for getting this done. These cars are going to kick some major ass with very few mods.




Last edited by Junior2JZ; 01-20-2013 at 12:33 AM. Reason: oops.. lol
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