The Resurrection: 94 Firebird Formula

[Injuneer]

Can’t wait to see how it runs.

[SSlowBoat]

Can’t wait to see how it runs.

short post, 10.84!!!!

long post when i unload everything @Injuneer

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[95 blackbird]

Hell yeah, nice!!
With a 1.46 60 ft! Dayum

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[Injuneer]

Seems like you’re getting better results out of that torque converter. I could never get it below 1.60 60’s. Always seemed to leave soft. And never below 11.00, even with a 127.7 MPH pass. What RPM does the nitrous hit? I think we had it at 3,800 in the MoTeC.

[SSlowBoat]

Seems like you’re getting better results out of that torque converter. I could never get it below 1.60 60’s. Always seemed to leave soft. And never below 11.00, even with a 127.7 MPH pass. What RPM does the nitrous hit? I think we had it at 3,800 in the MoTeC.

pass 1 and 2 on spray were 3200 on 6300 off, pass 3 on spray was 3000 on 6500 off.

so, heres the day: get to the track early, 2nd one thru tech. i noticed the car surging since last night at idle, and very rich. first pass was a crappy one, 12.3 then a second pass at 12.3xx slower and down 3-4mph.

third pass i took 10% fuel out everywhere on motor and changed the percent change to afr to make it lean out some. third pass back to 12.1xx and back to normalish 113mph.

said screw it lets see what happens on spray and first one off idle 3200-6400 on the window switch -7.5 degrees timing went 10.99 at 120mph. it was breaking up a little high in the rpm range and i have fairly cold plugs, a buddy was there and said try putting some timing back, so i set it to -5.5 on the mallory and sent it again. car goes 10.90 at 122mph. it felt better and broke up a hair at the top of 3rd but my bottle pressure was at 850psi.

decided 1 more, set timing to -4.5 degrees and footbraked it as hard as i could, with the window switch set to 3000 on 6500 off. shift light was set to 6500rpm and at the stripe i was cracklin a little bit with the last of the bottle, but i crossed it on the shift light and was about to grab the od. cracks off a 10.84 at 123mph

overall very happy (besides the breaking up issue) and the reward definitely was worth the effort. that 10.84 pass reminded me of @Ltconvert 10.78 pass i cracked off in his car.

i gotta find more nitrous, i need more bottles. also one of the nos powershot solenoids is leaking either on the inlet fitting to solenoid, or the -6an to fitting , so have to look into that, possibly switch to a nitrous outlet solenoid i have with a larger orifice.
@Injuneer i told you i would get her back to her glory and document it, thank you for giving me the opportunity to purchase this car, you built it well

10.99


10.90


10.84


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[JOATMON]

Looking good, awesome driving, it sure seems to be hooking good.
Nolan

[harner]

Very cool! It was a great day to hit the track.

[SSlowBoat]

Seems like you’re getting better results out of that torque converter. I could never get it below 1.60 60’s. Always seemed to leave soft. And never below 11.00, even with a 127.7 MPH pass. What RPM does the nitrous hit? I think we had it at 3,800 in the MoTeC.

i honestly honestly think this converter is too tight for this combo. if it had significantly more cam then it probably would be better. even on the juice and trying to footbrake it i cannot get it near 3k. but with the motor making around 400whp on its own, its just not enough.

fred do you have a ballpark of what the car weighed?? 3600lb (guessing with a full tank and me in it) @ 400whp puts it right at 12.12 on motor, which is close to where it is for me, and same weight at 550whp (in a perfect world) on the spray puts it at 10.90 at 124mph, which again is fairly close on the wallace racing calculator

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[SSlowBoat]

Looking good, awesome driving, it sure seems to be hooking good.
Nolan

thank you, i dont think im that good of a driver, atleast when it comes to actual dragstrip racing, but i guess i do something right sometimes (both in this car and the black supercharged car)

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[Injuneer]

The converter was spec’d to flash to 5,000 RPM with the full hit of what was a 275 shot. From the engine dyno, that was almost 800 lb-ft. That's exactly what it did on the chassis dyno. Remember, the original build ran a T56 with a McLeod Street Twin. I had better straight motor results with that setup. Just revved it to 5,000+ and dropped the clutch.

The TH400 sucks up a lot of power. With the T56 the drivetrain losses were as low as 12% at 763 flywheel HP. Through the TH400 losses were over 22%.