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impeller and pump condition gsx rfi

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Your welcome.

The carbed would take some adjustment, and the efi would compensate automatically. I think the engine would need an increase in compression as well, maybe a different head or modified stock one for higher compression which would bring it back to normal compression at that altitude. Can't imagine it would be that much though would it?

I just cleaned my RAVE valves and found another 300RPM that I'd never seen before, for a new top speed of 50MPH on the dreamometer!

Cool, must have been sticking down a bit?
 
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