MAINE, what I'm getting at is the amount of mixture that is allowed to flow into the cylinder at a given point. I know that the squish at TDC is the "true" compression but when there is more fuel/air mix in the cylinder at this point, then surely the compression rises?? My friend has water spray in his car, this is like hitting nitrous oxide on because it puts the compression up! I'm going along these lines.

If you turbo charge an engine, in most cases the compression must be lowered to compensate simply because there is more fuel/air entering the engine per cycle. I am applying the same rule to this topic, in relation to the big jets.

Plus by fitting pipes and going high on fuel etc, the scavange pulse will effectively be mis-timed. Bearing that in mind, the exhaust pulses could end up blowing back into the cylinder which would again put compression through the roof! I would say this applies particularly to the 300 kit using 250 pipes. Surely using 250 pipes on the 300 must seriously compromise power too??

I dont really know much about it, but I'm learning as I read on from here. I just though it would be a good and useful topic of discussion, for our own info and to save a lot of people some money!
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NSR250R MC21 (NEARLY SOLD!!)
VFR400R NC30 (SOLD)
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