Hi all,
Thanks Mike and Jim, I am running a 437/3 octura right now with an irwins pipe. Ive modified the carburetor inlet taper a bit to allow a more direct flow. ive also sharpened and polished the lower unit. someone told me to take the stock headshim out and run it with nothing, The clearance right now without a shim is about 5 thou. and it seems to like the 50% redmax im running. as for the temp, im still working on that. i plugged the stock outlet hole on the head and drill a hole directly in the top of the head about a third of the diameter. its definately running hotter but i think it could be a little warmer. any recomendation on what temp to run at? Ive also played with the transfers a little but not much. thanks for the reply.
~ James