yamaha04 Posted April 25, 2020 Report Share Posted April 25, 2020 Hey guys just getting my motor back together after many years tore down. Here the details. stock stroke hotrods crank. 65mm wiseco prolites noss head. Noss domes from F.a.s.t 21cc and 20 adjustable timing Usually set to +4 T5’s so I measure my squish. The proper way. Solider parallel Of pin out to the edge. I got .0485 on both sides with the 21cc so I put the 20cc domes in and got about the same. .049 shouldn’t the squish change with different domes ? I won’t know what compression is till I get my new clutch basket. My ring end gap was .010 acrossed the board without touching the rings just right out of the box. My goal is for a long lasting reliable motor. I would like to run 93-94 octane. That’s about the best I can get at the pump. Might be able to get some airplane fuel aswell but haven’t locked that down yet. Quote Link to comment Share on other sites More sharing options...
kawa110 Posted April 25, 2020 Report Share Posted April 25, 2020 Degree angle on domes In squish band area same in both sets of domes? Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
yamaha04 Posted April 25, 2020 Author Report Share Posted April 25, 2020 Ahh well. They look identical. Bought At the same time from Jeff at fast so maybe your right. If I take a flat edge across the dome and measure down is that accurate enough. Guess it really doesnt matter tho. from searching that is an ok squish so I should be able to use either set right ?? If I use the 20cc. Will I have to change timing. Quote Link to comment Share on other sites More sharing options...
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