Alright well I emailed Jeff with these questions:
1. Did PAS have any extra powertrain or TTA specific parts left over after production? If so, What'd they do with them?
2. Why were the TTAs never serialized build #s like the GNX?
3. Are there any photos of the assembly at PAS besides for these 2 (
http://philly.turbobuicks.net//TTA/PAS/PAS2.jpg http://philly.turbobuicks.net//TTA/PAS/PAS3.jpg )?
4. Were the TTAs truely just picked at random from the GM production line?
5. It is rumored the car was to have 17inch wheels but were dropped due to costs. If so, which wheel brand were they (i.e. Ronal R-15) and what color were they and how were they to be painted?
6. What other options were dropped from the cars to keep the bean counters happy?
7. Who did the tuning of the engines and how were the parameters of the stock chip decided on?
8. Why was the 6-speed manual transmission not used?
9. Was the TTA delivered from the factory with synthetic or conventional oil?
and I got this in response:
1) no parts were left over
2) The Turbo T/A had a unique VIN to begine with, making it more collectible in the long run. All othe Firebirds/Formulas/Trans Ams had a VIn starting with 1G2 and the Turbo cars had a 1G5, if I remember correctly. Might be the other way around. I am getting old.
3) Not that I am aware of. We really tried to downplay the amount of work that went on outside GM.
4) No. Each car was scheduled as a Turbo when it started the line.
5) We never planned anything but the original wheel/tire combo.
6) None. We stuffed the car pretty full of options to start with.
7) We did the cal, between the Buick engine guys, Rich Anderson, and myself. The cal was set up to restrict torque to 350 ft-lbs on a particular dyno test so that the hydramatic guys would be happy. That was done on dyno with little intercooler effectiveness, so real world power is obviously higher. Increased boost or decreased backpressure will increase horsepower, but the trans won't live real long in severe application unless you do some work there too.
8) We looked at a subsequent release with a six-speed, but the demand just didn't seem to be there. Less than 15% of Trans Ams were ordered with manuals.
9) Mobil 1 was the factory fill. Best synthetic, plus great flash resistance in the turbo. First time at GM, and then put into every Vette since, I think.
Be happy to help in any way I can