Quote:
Originally Posted by Tom Vaught
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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Tom you are correct., the heads flowed around 260cfm. A guy by the name of Bill Hughes (older than dirt in the 80's) ported them and the intake when I worked for Jim Kinnett who ran a Pro Stock Hemi.
The more spacer I put on the more it liked it. The Nash T/R was basically out the box but gained .20 just bolting it on with no port work. I sold it to a guy in Mi named Kevin ?? He was big into Pontiacs.
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66 GTO Nostalgia Super Stock/Street Legal Car
421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99
Multiple NSCA/NMCA World Champion
66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
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