[blykins]

As long as the clutch is fully engaged and the trans works well, I don't see where it would. It's a separate system in my opinion. I haven't really thought about it all that much though.

It does seem like a heavier flywheel would be less likely to let the engine change rpm, just due to the rotating momentum....and a lighter one would let the engine get down to the lower rpm where the next gear shift would put it. I'll have to think about that one though...maybe someone will set me straight.