This trip to JTran will finish the car up for a while. Johnny is going to change out wastgate springs for around 15 psi. Touch up the tune. Finish the gauge install in the factory dash gauge cluster (EGT, oil temp, and water temp). Raise the cars suspension around 1/2" and adjust the rear alignment for a little more straight-line traction. The car will be done until either 1) I get comfortable with the power, or 2) The transmission gives out and we decide on a replacement.

 

Moving the coolers and cutting the bumper worked like a charm. The Trans temp has always run around 200-205 deg in the summer. Today it stayed at 180 deg as long as I was cruising and 195-200 when beating on it. The bipolar nature of this car makes for a perfect street monster. If you stay under 4000 rpms, it's completely street friendly. If you put your foot in it all hell breaks loose. I'm not exaggerating.

 

How many miles do you have on it since the turbos?

 

500 miles so far.

 

Changed out wastegate springs to lower the boost for the street (17 psi down to 8-9 psi). The odd thing is the car feels just as powerful as before. The only thing that makes sense is that at 17 psi the Transmission or TQ converter was slipping. So 600+/- hp may be all my 5at can get to the wheels. We didn't put the car on the dyno to confirm it, but I'll update this thread next time the car is dyno'd.

 

That turbo looks perfect right there.

 

My car only has about 2000 more miles on it since the last update. Found out the car wasn't liking 93 octane at anything over about 10 psi. JTran has installed a custom triple-pass radiator, CJM return fuel system, and larger pump for E85. Maxed out the fuel system at 621 whp at 15 psi on E85. Honestly, it's more than I want for the street, so next time I get the chance I plan to dial it back to about 500 whp. So far, that has been the sweet spot for this car. It's very fast and fun at 500. 620 whp is like driving on ice all the way up to freeway speeds.

 

That's what most guys are seeing for the AT....550-600 rwhp. What trans build do you have? Just transgo?

Glad to see your AT is holding well Jax!

 

Love the set up! What is the turbo Specs?

 

It ended up being nothing to do with the transmission. I'm not the tuner or builder, so I cannot give specifics. But it turns out the car wouldn't make anymore power on 93 octane. After the fuel system upgrades, the went on to make 653 whp at 6300 rpms at 17 psi, but we were out of fuel there. Dropped the boost to 14-15 psi and it made 621 whp and the SFR built 5at is holding it fine so far.

 

It's a PT7075 0.96 A/R.

 

Thats awsome such a awesome build!

 

Wow cool to see your transmission hold up!

 

damn i want a single lol

 

I'm guessing lack of traction helps a lot, but it did hold fine on the dyno too.

 

what type dyno does Jtran have? I think my car is going there soon since I can't get Tim off his *** to finish tuning my car....

What were the "fuel system upgrades" that got you to 653 if 93 octane wouldn't cut it?

Awesome numbers for the AT!

 

Dynojet.
Bigger fuel pump, CJM fuel return, and E85.

Originally we could only make 600whp on 93, so we dropped the boost to 8 psi and left it at around 475-500 whp. Then after the upgrades we were able to bump the boost back up and make 650 whp at 16 psi running out of injector. So Johnny changed dropped the boost to 14 psi and made 621 whp. Any technical questions should go to him. I'm no tuner.

 

Thanks Jax! My car is being moved there in 10 days.....Jtran seems to have their ***** together

 

No problem. I have made some good friends there. They are good people.

 

TKS for all the info jax....awesome car and setup you got there...simple but effective...and all done in less than 5 yrs....LOL! Hopefully Jtran can get me right.