quote:Originally posted by jannem:
Plugging the ballpark engine specs to Pipemax, the cam is done by 5500rpm. Being big stroke, small bore and limited heads, it will fall quickly after that.
Improved intake and carb will help, whether single or dual, but wont do miracles, if the cam is not there. If you take a litre off that displacement, the sweet spot with the same cam will be at 5800 and it wont fall on it's face until 6500.
Now what comes to my cam suggestions, I'll take it back. You need more cam, the ones I mentioned are quite close to what you have now.
This is absolutely correct. It is difficult to have both displacement and rpm capability.
Something like the Ford 427 medium riser would have both. However having driven a 427 Cobra at 8500 rpm in fourth gear on the track at Pocono I would caution anyone about it.
If there ever was a car that the driver needed to be "qualified" to drive at that speed (180mph), this would be it. It is not a car for a novice as compared to a Pantera in which seemingly anyone can get into and drive fast the first time, BUT that is with a 351 NOT a 427 medium riser.
These are choices that are made in selecting things like displacement, bore/stroke, cam profile and heads. Even so. No combination will be perfect.
Personally I like the rev-ability of the small block vs. the big block.