garyc Posted June 3, 2014 Report Posted June 3, 2014 How is the difference in compression of the R1 @ 10.25:1) and R2 @ 9:1 accomplished? Heads, gasket, Stroke, piston?
Gunslinger Posted June 3, 2014 Report Posted June 3, 2014 Different heads. The R2 heads are actually truck heads.
mfg Posted June 4, 2014 Report Posted June 4, 2014 Truck heads and 'export' they are....The combustion chambers are larger in R2 heads than in an R1 head.
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