Originally Posted by
Roelof
Probably it is the resonance timing that does not match the exhaust timing, an offroad manifold is much longer than an onroad manifold because the needed lower rpm powerband range.
I am also interested to see what an offroad engine does on an onroad exhaust system.
Exhaust timing..the higher the exhaust timing the shorter the manifold needs to be.....this is why onroad based GT engines aren't going to pull like offroad based GT engines..