Quote:
Originally Posted by Mike Davis
I ran the Offy 5499 intake with 2-600 Holley's for quite a few years in the late 80's early 90's. 412 CID, Ported 62 heads and a Comp 288 Hyd Camshaft. In a 3700lb car with a 3.55 gear it ran 11.90's and could drive it anywhere. Replaced with a Doug Nash Tunnel Ram and the car ran 11.60's.
In my opinion it is not a bad intake with some work. Mine liked a 1" spacer under the carbs.
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Good numbers for the size of the carbs, the cid of the engine, and cast iron #62 heads that maybe go 255-260 when ported well.
The runners are short and have a straight shot at each of the carb venturis/boosters of the dual quad system. Exactly what you want for performance. Carbs like strong booster signals.
I agree that longer runners are better for real street driving rpm points but the typical 4 bbl intakes are at least 1/2 the length (of what they should be for best torque rpm driving). See the picture of a proper longer runner intake on a Performance Engine, notice that the runners are at least twice as long as the typical Pontiac factory 4 bbl intake runners.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
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Last edited by Tom Vaught; 10-16-2019 at 09:33 AM.
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