installing a 600cfm holley
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Junior Member
Joined: Apr 2002
Posts: 70
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From: Inwood long island
Car: '79 T/A and '84 T/A
Engine: 455 buick and 305 chevy
Transmission: TH400 and T-5
installing a 600cfm holley
Has anyone put a non-computer controlled carb in place of a computer controlled carb? I have a Holley 600 cfm that i rebuilt and was going to put on my '84 LG4 S/E but I'm not so sure I want to start dealing with trouble codes and doing this and that to get this carb to work when my stock Rock carb is just as strong as the holley, but is does need a rebuild and a re-tune. Has anybody done this before? Is it worth it or worthless? And I refuse to rip out my computer. Any tips would be great. THANKS
Joined: Mar 2000
Posts: 43,187
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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
Plenty have done it. You need a non-computer-controlled distributor as well. The carb won't mount to your stock intake manifold without an adapter. Your transmission torque converter clutch will no longer lock up automatically. Your SES light will be on continuously.
The Holley will give you exactly zero power gain vs the potential your stock CC q-jet has. Look in the tech section on this board, you'll see tips on how to make your q-jet do its thing. For a daily-driven, or primarily street-driven car, the CC carb is the best bet.
The Holley will give you exactly zero power gain vs the potential your stock CC q-jet has. Look in the tech section on this board, you'll see tips on how to make your q-jet do its thing. For a daily-driven, or primarily street-driven car, the CC carb is the best bet.
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