Exhaust port height stock vrs 4 mil

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4cyl h2
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Joined: Wed Oct 05, 2016 11:34 pm

Exhaust port height stock vrs 4 mil

#1 Post by 4cyl h2 » Fri Feb 10, 2017 1:59 pm

I'm doing some basic porting on the engine I'm building an ( rd350) and wanting to know how the exhaust port height Compares to these two different strokes any thoughts? For now I'm planning on setting ex spec at 28 mm from top of ex to deck if I use a 4 mil crank what spec should be used to keep ex duration the same as stock stroke.
Thanks for any input in advance

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