Legends die hard

When you're withing the modest boundaries of a street driven car (-7500RPM or so) it seems that all those bore/stroke ratios end up meaning darn near nothing. The Engine Masters Challenges have proven that out - with competitors winning and placing well despite drastic differences in bore/stroke.

My 2006 entry was a 434 inch per rules that had a 3.64 stroke and a 4.350 bore - I KNEW the big bore/short stroke was the way to go... It made 678 horsepower. My 2008 entry was 429 inches - 3.78 stroke and 4.250 bore and it made 675 HP while "handicapped" with a flat tappet cam and stock rod & main journal dimensions.

The punchline is that cylinder heads, intake and cam are the whole deal - maybe 80% of the package. Everything is torque time RPM and the big motor will make more torque from idle to "damn thats scary...."

Barry Rabotnick
Survivalmotorsports.com