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On 21 Mar 2003 at 8:18, Roush, Norman wrote: > 1) Why does the Berg catalog say not to use semi-hemi cut heads in a FI motor. > I've seen that some of you listers have successfully used them. I don't know. I've done it and it seems to work fine on a stock engine. Gene mentioned something about the FI type 3s having a knock sensor, too, but that isn't true. I think they mistook the head temp sensor for a knock sensor.... > 2) Is "fly-cut" the same a "semi-hemi"? Well, not quite. Flycut usually means to just cut the flat at the face of the cylinder surface deeper (to increase the compression ratio) and/or wider (to increase the diameter for larger cylinders.) -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org