Some Thoughts On Slant Geometry

nm9stheham said
Just some more numbers for you: (Sorry, you got me started! LOL)

The rod/stroke ratio for the 170 rod and 198 crank is 1.567. Your piston speed will peak at just over 6000FPM at 6000 RPM. IIRC, that's getting up into Pro Stock pistons speed territory. (IF they use peak piston velocity as a measure....I am not entirely sure.)

Now if you wanted to push the rod/stroke ratio and forget budget limits, then a Chevy L6 (6.000") rod (SCAT makes them in H-beams BTW) with the 225 crank offset ground for max stroke would push the rod/stroke ratio down to 1.422 and the displacement would move up into the 235-240 range depending on exact boring. Max piston velocity would peak at 7000 FPM at 6000 RPM. F1 engines up into this piston speed range. So I suppose this would be a low RPM engine, but the intake suction would presumably increase substantially. A lot of big stroked motors run road/stoke ratios in this range so it is not virgin territory.

A couple of thoughts on that.
First, I would like to get this engine package as close to square as possible, so adding stroke is the LAST thing I want to do.
Second, its important to me that whatever package I eventually evolve will be based mostly on stock parts. No crazy stuff I need to hunt down or funky machine work. As a bracket car, anything in the 12s will make me happy...in grudge form, I want to be able to spray and lean and spin this thing as hard as I can without giving any thought to it tossing the crank on the ground.
I like junk. Junk is fun, cheap and usually a whole lot stronger than the text books will indicate