Author Topic: What saw are you looking for ?  (Read 1584 times)

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Offline Al Smith

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Re: What saw are you looking for ?
« Reply #30 on: January 22, 2015, 08:43:51 pm »
It's in shipment Adam,not here yet .

I think you are refering to an eye brow port .If so from what I gather it allows for the exhaust to self relieve the cylinder pressure at cranking speeds but has little effect at running speeds .Time /open/speed thing .

The Mac 805 cylinder had an eye brow and the later model 850 cylinder did also .The replacement after I straight gassed it with a prime was an early 850 which didn't have an eyebrow .

Now it could theoretically act somewhat like an exhaust boost port but I really can't say it would or would not .