I'm currently using the superram upper intake and base manifold with 1000CFM throttle body. I am wondering if I use high flow long tube runners with stock ported plenum, if I will lose any peak or high RPM horsepower. I know I will gain low end torque, but at what cost of upper end horsepower and torque?

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'91 Formula
383CI Supercharged
5-speed
3.42
12.34@117.04
on Drag Radials

 

You will lose some power above 5000 RPMs or so, but it won't be as dramatic a loss as it would be on a naturally asperated motor. The bad news is that the increase of torque from long runners won't be as dramatic on a force fed motor either.

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• 355 cid
• AFR heads
• Arizona Speed & Marine hydraulic roller cam w/ AFR hydra-rev kit
• modified SLP runners
• TRW forged pistons/ceramic coated
• fully balanced
• Edelbrock headers/ceramic coated
• SLP cat-back
• Paxton supercharger
• Nitrous Express nitrous oxide

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