Originally Posted by
Mike Rainbird
The bigger the plenum, the "lazier" it will feel at low rpm, as the gas speeds will be slowed down dramatically by the increased volume, at high rpm its not an issue due to how much air is being pumped.
As I said, I personally wouldn't put one on a car until 500bhp+ was wanted. Now considering I sell them, I think you can safely say this is honest advice.....
Have seen results on the Dyno £3k inlet against the spaced RS500 plenum the spaced RS500 was better. Although ive just forked out for a new £3k exhaust manifold im sticking with my Spaced RS500 . Ive seen no reason to buy one of these inlets at Power levels now approaching 800bhp.