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Old 10-31-2012, 10:34 PM
BadBanana BadBanana is offline
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Vinnie: You said that your 355 isn't stock. I had to use the vac. sec. 780 on a 425 hp 454 in NHRA Super Stock and we made 806 hp in Super Stock trim 20 years ago. I NEVER liked the non vacuum secondary on the street for streetability and every time I made the 780 so that the secondaries were manual, it always sounded better, but didn't run as fast. I suppose I might have made more power if I could have used an 800 or 850 cfm. Do they make one with vac. secondaries. My point is, you can make good horsepower with a vac. sec. smaller carb that is more streeable and doesn't foul plugs or hesitate. The car ran 9.40s 142mph at 3650 lbs, with a Turbo 400 20 years ago. The trick was to have the right size nozzles in the accelerator pump system and the correct stroke in that system (add the larger pump capacity) - and let the vac. secondaries come in relatively quickly, but not instantaneously.
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