2008 Cobra Jets belong in Stock

[Fred Popov]

Originally Posted by Evan Smith

Ed F.,

You can look at the engine specs on line and see the differences, but in a nutshell, the CJ has less compression by a full point (which is a big deal even with a blower), smaller valves, smaller cams and smaller throttle body.

Evan

Evan,

I looked up the blueprint specs for the 07 GT500 and the 08 CJ and I don't see the differences that you are talking about. (Specs don't have a GT500 for 08) The valves are the same size. The TB is 2x62mm for both. Compression is only 0.12 less due to a slightly greater deck height. But yes, the cam is smaller in the CJ. Am I looking at a different spec. than you?
Thanks for clarifying...
Fred




500 330(S) 9.5 EFI FORD RF7R3V-9K461 lower 1.81 H/R 48.0 B,2
500 330 .059 Dish .128” 13.5 cc 2@1456/2@1259 468/468 .037 Beehive


425 330 9.38 Supercharged EATON RF7R3Z-9K461 1.8 H/R 48.0 B,3,4
425 330 .074 Dish .118” 13.5 cc 2@1456/2@1259 413/413 .037 Beehive