July 06, 2022, 01:17:41 PM


127" now is 124"

Started by HD Street Performance, April 17, 2022, 06:38:54 PM

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HD Street Performance

Customer was having trouble getting the 4.185" bore to live so we went back to 4.125 with ductile sleeved cylinders. Pistons are CP full skirt standard forging customs. That run today is the light blue line. The red line is the previous build with higher compression and 127". Compression is 11.5:1, CR650 cam and my Pro Street 110 heads.
Other equipment is listed.
Dyno and a great tune done by Bob Thoma at Razorback Performance