ORIGINAL: Steve108
I'm sorry to get you upset. I am not trying to start anything but I am saying formula racing. Where you have a set of guidelines to stay within. It covers a broad spectrum of racing. Say you have a maximum of 355 cu.in. but you have a 350. Boring it .030" over will get you to the limit. I understad it is uncommon but it does happen.
About the porting thing I just wanted to share my experience with others.
Again I'm sorry. Have a nice day everyone.
Hey no need to be sorry; I'm not upset, I relish debate.... NASCAR here run 355ci's also, only NOT A SINGLE TEAM ON THE TRACK is running a bored block, seeing as how they can get one NEW that fits their displacement agenda... My argument is that it seems natural that ANY pro-team would-do the same....
I'm not arguing against "guidelines" either, they don't care if the liner is bored or made that size to begin with, size is the rule, not how you obtain it...
It's new VS. recycled... and with winning on the line Pros are not recycling...
I bracket raced for a few years and ALL of our blocks were bored, but with no sponsor-ship, that's all you can afford... NOBODY I have EVER heard of "bores" for performance... if you wanted the extra displacement you either added a stroker crank of some sort or you went up a size... I had a 434ci stroked small-block based on a 400ci block and the .030 overbore is figured in the size but look at like this... The .030 even on the LONGER stroked motor still only yields an approximate 1% increase in displacement... Let's assume that 1% can apply to the .15 (and it can't, in the V8 we bore all 8 cylinders, not one)
you go from a 0.15 to a 0.1515 so even if you
could, why would you?