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106 p.s.i


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4000 feet and 106 psi sounds right on dot for a stock bore motor right just pipes and filter

so how much can i shave off the head to still run pump91?

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4000 feet and 106 psi sounds right on dot for a stock bore motor right just pipes and filter

so how much can i shave off the head to still run pump91?

 

I would shave 30 off of it and reinstall the head. Check squish, and do a compression check. You can always take more off later but it is kinof hard to put it back on.

 

I think around 40 tho you have to have the chamber reshaped.

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