I ran my T/A tonight. I got it down to a 16.11@84 mph. How does this sound for a bone stock LG4 with 3.73's? I know its still a dog, but for what it is, it surprised the hell out of me. My best 60 foot time was 2.17. Do you guys have any ideas on how to break this "beast" into the 15's? Thanks guys.
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1983 T-top Trans Am. All stock (for now) LG4/auto/3.73 posi. 70,000 original miles. SLOWLY going through a Knight Rider conversion. (it will be done one of these years)
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1983 T-top Trans Am. All stock (for now) LG4/auto/3.73 posi. 70,000 original miles. SLOWLY going through a Knight Rider conversion. (it will be done one of these years)
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five7kid
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May 4, 2026
Air cleaner - either open element or dual-snorkel.
Timing - advance it to 6 degrees and see how it does. You might even be able to go up to 10.
Exhaust - stock stuff is like you running a marathon breathing through a straw. Get headers, 3" y-pipe, 3" cat, 3" cat-back.
FWIW, I'm running 16.8's @ 81 mph with stock LG4 with just the air cleaner and timing but at 5800'. That translates to 15.6's @ 87 mph at sea level. My 60 fts are much worse than yours, but I don't have gears. '86 LG4's had 9.6:1 compression vs. your 8.5:1, so that does help me.
Got to get the "work-in-progress" done...
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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
Timing - advance it to 6 degrees and see how it does. You might even be able to go up to 10.
Exhaust - stock stuff is like you running a marathon breathing through a straw. Get headers, 3" y-pipe, 3" cat, 3" cat-back.
FWIW, I'm running 16.8's @ 81 mph with stock LG4 with just the air cleaner and timing but at 5800'. That translates to 15.6's @ 87 mph at sea level. My 60 fts are much worse than yours, but I don't have gears. '86 LG4's had 9.6:1 compression vs. your 8.5:1, so that does help me.
Got to get the "work-in-progress" done...
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).