Quote:
Originally Posted by davidimurray
But looking at the mods that have been made the diameter should be the same, the difference is the shortened runners which will change the resonance of the system.
|
Don't know very much about this stuff, but I do know that runner length is considered very inportant by manufacturers of production cars, and in general the rule is the longer the better. Having said that, their concern is not only the headline max power, but how well the car pulls in a high gear at 1500 rpm, sas it will often be called on to do in traffic situations, whereas our concerns are different.
Even so, I know Jenvey, the performance throttle body makers, reckon that you should try for runners as long as reasonably possible. Not too sure about the resonance issue because resonance is something that happens at a particular frequency, and may have more to do (in a production car sense) with reducing intake noise than power characterisitics. Note that I said I don't know much about this stuff, though
