> OG Crazy Wrote:
> -------------------------------------------------------
> You can raise the exhaust port a half a millimeter with the top of it
> flat for 12 or 14 mm with radius in the corners of the top and or
> shorten your header 1/2 inch.
>
> My friends who race go karts and have put them on the dyno have found
> that Peak power happens on air-cooled cylinders at 418 degrees
> Fahrenheit with the reading taken at the base of the spark plug with a
> thermal coupler.
I've been considering raising the exhaust port just a bit but hadn't gotten around to it yet. I'd shorten the header but don't have the resources to weld it back together. I may be able to find someone locally to help with that.
As far as what you said about the peak power being at 418*, that seems like I'd seize pretty fast if I was getting that hot all the time with my aluminum cylinder.