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3RotorRx7 · 10-21-2014, 09:18 AM

Trying to decide on a compression ratio for a build on 2003 2.7 Boxster motor. I already have the top end ported by Hoffman Automotive Machine, and cams. Will be doing upgraded connecting rods, ARP bolts, and coated bearings. I see that the RSR motors are running 14.9:1. I will be running 109 unleaded race fuel. I will primarily be running it in FP autocross type events, and some track day sessions. Any advise would be appreciated.

Thanks,
Erik

10-21-2014, 09:18 AM	#1
3RotorRx7 Registered User Join Date: Mar 2011 Location: Texas Posts: 22	Compression Ratio Choice Trying to decide on a compression ratio for a build on 2003 2.7 Boxster motor. I already have the top end ported by Hoffman Automotive Machine, and cams. Will be doing upgraded connecting rods, ARP bolts, and coated bearings. I see that the RSR motors are running 14.9:1. I will be running 109 unleaded race fuel. I will primarily be running it in FP autocross type events, and some track day sessions. Any advise would be appreciated. Thanks, Erik