Quote:
Originally Posted by spyhunter
You don't race at 2000-3000rpm do you?
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however if you hit max torque in this range and normally your going to launch in this range.....well as any drag racer knows torque wins races.
So if he is launching a 455 the above applies and if on the dyno he produces more torque with closed high flow exhaust rather than open headers or straight pipes this would lead that person to believe that a little bit of back pressure is better than none because it works best for his setup.
This is where the confusion and back and forth comes from.
Because my buddy with his GN has a 3.5" downpipe to a muffler right under the passanger seat so it is basically no back pressure and he produces more power than a closed high flow exhaust system so in this case it is the opposite.
It all depends on your setup, power band, fuel curve, etc.
Another example...........3" exhaust straight pipes on a N/A alero isn't going to produce more power or better ET than that same alero with a SLP exhaust system.