I know Lot's of send our heads of to be milled and reshaped, and when they come back the boat runs better. But I wonder how many actual check the comp before and after?
I sent a 951 head to GROUPK and when I put it back on the machine had a little better low-end. I doing some more mods and checked it as was surprised to see I was only getting 130psi cold. I calibrated the gauge against a couple brand new 785 motors and it read 155 psi so I know it's close.
Needless To say I'm having it shaved som more. I'm shooting for 150 psi Cold.
98 ROTAX 951
I sent a 951 head to GROUPK and when I put it back on the machine had a little better low-end. I doing some more mods and checked it as was surprised to see I was only getting 130psi cold. I calibrated the gauge against a couple brand new 785 motors and it read 155 psi so I know it's close.
Needless To say I'm having it shaved som more. I'm shooting for 150 psi Cold.
98 ROTAX 951
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