What would happen if I were to use a hyd. flat tappet cam with hyd. roller lifters? Does it make a difference? or is it just dumb and I am an idiot for asking a supid question?

 

Won't work. The ramp rates are wrong too fast too soon for the rollers, it'll also try to spin them in the bores. You'd need a way to keep the roller lifters from spinning (and if your block is setup for that, might as well get a roller cam as well eh?). Nah, just won't work, gotta match up the right parts.

 

Thanks for the info my friend...Yes my engine is made for hyd. rollers...something else just popped into my head... could I run a 12.2:1 comp ration on ragular gas...well obviously nothing less than premium... what would be the rsult?

 

10.5 is about the max with 93 octane. You can get by with 11:1 if you use a sack-full of tricks...(cam with lots of overlap, recurved dizzy, shift points in transmission moved higher, stall converter, engine under-idle shutdown to name just a few)