ORIGINAL: rcpattern
On post 37 here, the Syssa is turning an 18X6 Vess at 9300, which to me would indicate the Syssa is stronger. I can't believe a pipe would make a 1200 RPM difference.
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rcpattern,
Ya, and I can't believe it's not butter
Depending on the porting and the length of the tuned system, even greater rpm gains could be achieved. Some engines respond dramatically to a pipe and some don't do to the porting.
I am posting the finding of engine owners, not speculating.
In Todd's engine manual with the engine running without exhaust restrictors the max rpm is rated @ 8750 rpm with the Vess 18X6. No one running the Syssa has acheived that rpm with the stock exhaust, yet.