10-26-2009, 10:54 AM
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| Senior Member
Join Date: Jul 1999 Location: Long Island, NY
Posts: 780
Car: 1987 GTA Engine: 645hp/656 ft lb Blown 383 Transmission: 700-R4 3,000 stall Axle/Gears: 3.45 | track times- Vortech carb enclosure and supercharger
| took it out for a test and tune. 8.2:1 motor, running only 8-9lbs boost, my goal is 13 lbs. (have a smaller pulley that i will be using). plain demon 750 out of the box. vortech carb enclosure. only 24 degrees total timing (just being safe now). only got one run in, 12.689@109.4. not a bad starting point, and oh yeah the tranny was slipping so bad i had to come off the gas to shift. plus i ended up throught the traps at like 6,000 rpm with 3.45 gear (so i think it was slipping in gear too). 1.85 60 ft on old 255 street radials. figure with more timing, boost, tire and a good tranny, (and some tuning) i should see 11.4's or 11.5's, that's my target atleast. car wieght with me and tools was 3674. 75 over my normal wieght | | |
__________________  87 GTA: 645hp/656 ft lbs. at 5300, (tossed blower belt across room). 383 stroker: je pistons, manley rods, chromoly crank, 8.38:1 CR. Vortech V-1 14lbs boost, Vortech carb enclosure, 750 mighty demon, Trickflow 2.02 ported heads. 8 point roll cage (MBRC). Freddy Brown full manual custom 700-R4, 10" converter. Old motor. Best ET 12.689 @ 109.4 w/ a 1.85 60 on 255 street radials. tranny was slipping real bad, had to pedal it to shift. looking for 10's now. |
 
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