Rear Mount GTO Pics
On The Tree
Joined: Sep 2009
Posts: 128
Likes: 0
Car is wicked man!!! I love it!!!!
Congrats and I totally agree... Turbo's sound SO sweet...
hey... under cruising (just cruising around town at part-throttle) can you hear your turbo spooling up and down when you accelerate/decelerate?
Also... when that gate opens up, what does she sound like?
Sounds like a bunch of air escaping? or?...
Looks GREAT!!! I LOVE it!
Congrats and I totally agree... Turbo's sound SO sweet...
hey... under cruising (just cruising around town at part-throttle) can you hear your turbo spooling up and down when you accelerate/decelerate?
Also... when that gate opens up, what does she sound like?
Sounds like a bunch of air escaping? or?...
Looks GREAT!!! I LOVE it!
Spool time will vary on a lot of factors: pipe size, routing, etc. If you search for Zombie, he's got an in depth thread of his rear mount saga and what he went through with his set up.
2.5" seems to be a happy medium. I wanted a car that could handle 500whp and spool quick. I know this car can handle more, and this set up is rock solid. Eventually, with the trans and drivetrain beefed up we may push for 1,000hp. Who knows.
I know.
Spool time will vary on a lot of factors: pipe size, routing, etc. If you search for Zombie, he's got an in depth thread of his rear mount saga and what he went through with his set up.
Thread Starter
Joined: Nov 2001
Posts: 3,406
Likes: 2
From: Tallahassee, Fl
i wanted to update this since i have played with the car a little over the past couple days and the thing brings a huge grin to my face every time i drive it.
we tried a couple different wastegate springs and never really saw the results we were looking for so the customer had us put an an E-Boost Street (nice unit, not a fan of the 30 features with 1 button setup though) and turn up the boost. also added an FTI converter and built the trans so we could do so without concern.
mind you this is not a dyno-happy setup, the converter did not want to stay locked for what ever reason so the dyno numbers are unlocked and low timing due to heat soak. i did the final tuning on the street which i much prefer for a setup like this but ill give some comparisons anyways.
5 psi locked (stock converter and trans) - 408 hp
5 psi unlocked (new converter and trans) - 348 hp
new numbers at 10 psi unlocked - 438 hp @ 11.0 afr and 6-7 degs timing (iat and intercooler were extremely heat soaked due to 100 degrees ambient in the shop and multiple pulls)
did some street tuning today and with real airflow across the intercooler i was able to bring the timing back to a still conservative 11 degrees at 10 psi. car moves out like a champ. best guess is 130ish traps and 530 hp on our dyno through a locked converter. told the customer there is easily more in her if he wants me to lean on it but he wants to leave here for the time being, but i know he'll be turning it up when he puts some tires on the car because the 19's are quite cutting it
really making me pissed my car isnt back together haha. . .
we tried a couple different wastegate springs and never really saw the results we were looking for so the customer had us put an an E-Boost Street (nice unit, not a fan of the 30 features with 1 button setup though) and turn up the boost. also added an FTI converter and built the trans so we could do so without concern.
mind you this is not a dyno-happy setup, the converter did not want to stay locked for what ever reason so the dyno numbers are unlocked and low timing due to heat soak. i did the final tuning on the street which i much prefer for a setup like this but ill give some comparisons anyways.
5 psi locked (stock converter and trans) - 408 hp
5 psi unlocked (new converter and trans) - 348 hp
new numbers at 10 psi unlocked - 438 hp @ 11.0 afr and 6-7 degs timing (iat and intercooler were extremely heat soaked due to 100 degrees ambient in the shop and multiple pulls)
did some street tuning today and with real airflow across the intercooler i was able to bring the timing back to a still conservative 11 degrees at 10 psi. car moves out like a champ. best guess is 130ish traps and 530 hp on our dyno through a locked converter. told the customer there is easily more in her if he wants me to lean on it but he wants to leave here for the time being, but i know he'll be turning it up when he puts some tires on the car because the 19's are quite cutting it
really making me pissed my car isnt back together haha. . .
Last edited by Tally TransAm; Jun 30, 2012 at 04:32 PM.
