garyc Posted June 3, 2014 Report Share 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? Link to comment Share on other sites More sharing options...
Gunslinger Posted June 3, 2014 Report Share Posted June 3, 2014 Different heads. The R2 heads are actually truck heads. Link to comment Share on other sites More sharing options...
mfg Posted June 4, 2014 Report Share Posted June 4, 2014 Truck heads and 'export' they are....The combustion chambers are larger in R2 heads than in an R1 head. Link to comment Share on other sites More sharing options...
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