I'm trying to wrap my head around this.
I wonder if heat from exhaust manifold isn't a factor.
Overall no low end torque with good mid-range & up sounds like non-optimized port, intake valve size & valve timing.
Does retarding the cam help the launch?
No heat on my setup. Hooker long tubes with the heat tube cut and welded closed. It IS a factor on regular street driver type cars, though. Actually affects cars today now more than it did in the past because of ethenol
Retarding the cam timing is the opposite of what you want for a strong launch...with a gasoline engine.
