Dcr

BURN 'IM AT THE STAAAAKE! There, thought I would get that out of the way....LOL!

Very interesting way to look at this, A/J. As a data point, we are ending up pretty much on that chart's trendline with 10.0:1 SCR, 268 Crane cam, 112 LSA, 5 degrees cam advance, with added margin due to AL heads and good quench. DCR in the 8.2-8.3 range. I was originally thinking 262 but chickened out, and erred on the side of a bit more margin for my son to drive and enjoy it anywhere, any time, for many 10k's of miles and not have to worry about gas or detonation. Soon we'll see if the TC stall is too low....

BTW, DCR has been talked about and considered for 4-5 decades; 40 years back, it was referred to as 'effective CR'. But no online calculators existed , and I suspect only the advanced race teams and factory engineers had a way to work it out and relate it to performance. The internet and computers and online calculators have brought all of this within everyone's reach.