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#1
01-15-2004, 11:57 AM
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Any idea on what size Holley carb and jet sizes to run on a 73 455 firebird for street use.
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#2
01-15-2004, 11:57 AM
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Any idea on what size Holley carb and jet sizes to run on a 73 455 firebird for street use.
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#3
01-17-2004, 06:19 AM
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Holley recommends List #0-80450 600cfm Square flange and List # 0-6910 800cfm Spread bore flange, for 1973 Pontiac 455.
I recommend restoring the original Q-jet if it´s availible. Hope this helps some.........Kent |
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#4
01-17-2004, 08:32 AM
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Need more info? Is the engine stone stock or does it have modifications?.....Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#5
01-17-2004, 02:41 PM
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all i know its been rebuilt.diff cam ported 4x heads.30 overbore.apparently puttin out 430bhp.edellbrock manifold.came with 2 carbs,an 850 holley;also a 750 sec vac.not sure what to use.any help would be great,thnks.
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#6
01-17-2004, 05:46 PM
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I'd run the 750 first. Baseline jetting can be obtained from Holley's web site. Make sure power valve is stock and float levels are correct. This will give you a starting point for reference.
67 GTO winter project |
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