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OK i get it,, there is only one way to know for sure and I already have less then the safe minimum so for me it will be the 98 kit with the 9.7 to 1 flat tops ,,I do all my own work and I learn as I go , so if it seams that I ask a lot of questions that's why . I want to be sure that my next dyno is over 100/100. See my dyno run in the dyno section. As for the tune it is a 5 hour drive to a good tuner. I need some help to get to where I want to be..
When the build was first done I used 95 big bore with 9.4to1 flat tops 37g cam forum members said my compression was to low so I sent my heads out for port and polish set compression 9.8to1 ,,had bike dyno ed wanted to make 100/100 but did not if i cannot do that with cam lift I will install a 98 kit that is 9.7to 1 with my 80.5 heads that should do it.. if i could fine a dyno run with that build that may give me the information i need, if i take the motor apart to mock up,, new 98 kit will go in, will stay with cams just though the rockers would be easier.
"if you add the 1.725 rockers your clearance will be another .011 less than your measurement with stock rockers" ?? not following this thinking, won't the high lift rockers add about .030 additional lift at the valve?
Quote from: sfmichael on Sunday, September 16, 2012. 09:00:37 PM. "if you add the 1.725 rockers your clearance will be another .011 less than your measurement with stock rockers" ?? not following this thinking, won't the high lift rockers add about .030 additional lift at the valve?Yes the high rockers do increase the valve lift, most of the valve lift occurs as the piston is going down the hole on intake, I was only referring to the increased valve lift at TDC where valve to piston contact could occur resulting in engine damage
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