asmund

Hi, my 49 on the minipipe turns the apc 12-4 exactly 14000 peak and the 12,25-3,75 at 13600 peak. This is on zero nitro. Are these numbers high or normal?(I have done some port work to the sleeve) Meaning do I have an extraordinary good one? My lokal mvvs dealer tells me that 15000 should be attainable on the 12-4 if the engine was set up as rear exhaust, can this be true?? regards aasmund

pe reivers

I think 14000 on a 12x4 is a very good value at 1.5 HP. There always will be differences between engines. Maybe you can ask your dealer to back up his claim, and ask what he did to achieve the very substantial 23% power gain.

asmund

Thanks, I think I will leave it well alone for now. My engine is side exhaust so It is to late to turn the sylinder around to try it as rear exhaust, but I seriously doubt that just blowing spent gasses out the rear instead of to the side will give a 23% boost, thats a lot