wat can be done to make a Lg4 run at least 14's ?
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Joined: Jun 2004
Posts: 445
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Car: 1991 pontiac firebird
Engine: 305 V8 flo-pro exhaust
Transmission: automatic 700r4 4speed
Axle/Gears: stock 2.73's :(
wat can be done to make a Lg4 run at least 14's ?
ive been wondering what combos can be done to a 190 hp lg4 to make it run atleast 14's without sprays or turbo?
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Joined: Sep 2001
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From: Montreal\Quebec|Canada
Car: Camaro Z281991 Engine: 5.7L/350 TPI Transmission: TH700R4 ··································· Car: Acura CL 1998
Engine: 3.0L/183
Transmission: 4 spd auto/OD
LT1, ZZ4 and such camshaft
Matching springs
L98 heads
Roller rockers
Lower gears (3.55-3.73-4.10) posi of course
Better intake manifold
Rebuild Q-jet carburator
Good tires
Car is obviously in good shape, right ?
:edit: you need a flat tappet camshaft.
something like betweem 200-210@50 intake 210-220 exhaust
Matching springs
L98 heads
Roller rockers
Lower gears (3.55-3.73-4.10) posi of course
Better intake manifold
Rebuild Q-jet carburator
Good tires
Car is obviously in good shape, right ?
:edit: you need a flat tappet camshaft.
something like betweem 200-210@50 intake 210-220 exhaust
Last edited by Spectre; Sep 3, 2004 at 05:42 PM.
Supreme Member
Joined: Jul 1999
Posts: 1,593
Likes: 3
From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
Your 84 LG4 is only rated for 145 or 150 HP, with something like 8.3:1 compression. Same as the one I run:
Stock heads.
Stock intake (cast iron to boot).
DR or DG secondary metering rods in the stock Q-jet.
Stock ignition.
Stock 3.42 rear gears.
Stock peg-leg differential.
Worn-out BFG T/A radials.
Small .420" lift camshaft.
Hedman headers and Y-pipe
Dynomax 2 3/4" catback.
T5.
225,000 miles on engine.
Best ET: 14.49
Best MPH: 98.7
Stock heads.
Stock intake (cast iron to boot).
DR or DG secondary metering rods in the stock Q-jet.
Stock ignition.
Stock 3.42 rear gears.
Stock peg-leg differential.
Worn-out BFG T/A radials.
Small .420" lift camshaft.
Hedman headers and Y-pipe
Dynomax 2 3/4" catback.
T5.
225,000 miles on engine.
Best ET: 14.49
Best MPH: 98.7
Senior Member
Joined: Jun 2002
Posts: 558
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From: Bowling Green KY
Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
Do not use L98 heads. They have larger chambers that will only lower your already low compression. You should have 416 casting heads. They flow just about as well as the L98's and respond well to porting. The most important thing you could do besides a tune-up is replace every part of the stock exhaust. Headers, high flow cat, Y- pipe, muffler. Don't get it for and LG4 either. Get it for an L98.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Here's one such combo in sig (assuming sea level, and assuming the 2-3 shift problem was cured).
Daily driven, emissions-legal.
Would be even quicker with more stall and more gear.
Daily driven, emissions-legal.
Would be even quicker with more stall and more gear.
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