Anyone in the 9.5:1 comp ratio range run one of these cams? If so, what brand of impeller and cut are you running and what's your max RPM with said impeller cut?
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XM278 with roller rockers 10.5:1 comp 750 DP. I did it late in the season (after a valve spring gave way) so I've only had it out a couple of times since. I had backed down the timing until everything was broken in. I was running about 4800 RPM. We're at 4500' altitude. It was the most responsive the engine had ever been. I'm wondering if I'm a little under carbed at 750. I might have to see about an 850.
467 Chevy 9.6:1 with XM278H, 830 Holley & 1" Carb Spacer, Air Gap intake, Edelbrock Marine 61459 Heads, Roller Rocker Arms 1.7 7/16. 5100 RPM with an A going to an AB looking for 5300 to 5400 RPM
how was the drive home Jerry glad to see the river disappear in the rear view
Its a FORD thing chevy's arent quick enough to understand