so i got a stock puch and i put a biturbo on it and when i hit about 20 i could feel it get into range and kinda zoom alittle to top speed. I put a hig hcompression head on and then it just feels smooth all the way up. Is that normaL? do i have to port to get more use of the biturbo or what?
No, the biturbo is tuned towards higher rpms. It is pretty normal if it doesnt kick in till 20.
Higher compression benefits low end which is why you have a good balance of power.
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