Cam design limitations

OneOfMany said
No expert here, but wouldn't longer exhaust headers simply cause a little more lag and slower spool up?

Certainly if the exhaust gas becomes cooler, the air will become more dense, and therefore will have less pressure to hit the turbine as quickly, so boost will come on more gradually?

Grant

I am pretty sure you're right about this.

Our particular car will be a drag-only car with no need for responsive throttle RPM rev-capability. We intend to load the converter (and engine) heavily and build lots of boost before we release the brakes, so the value in a quick-spooling turbo would seem to be in a street car environment more-so than in a drag car, I would think.