1.25 or so HP/C.I. from a 390

Looking at combos - I currently have a 318 in my Dart. I'm considering the 390 because I might like to use my existing block instead of searching for a 360.

Without getting into what parts I should use, here's my theoretical question: is 1.25 hp/c.i. an achievable figure from an N/A stroker 318/390? Looking for 475 gross HP, netting in the neighborhood of 390 to the wheels. I want to go 11's in a 3,200lb car. I'm figuring at least 10.25:1 cr.

For comparison, a 375 hp 440 is 1.17hp/c.i. and the 275hp 340 is 1.23hp/c.i. These are the generally accepted factory stock ratings. Based on these figures, I think 1.25hp/c.i. is attainable from the 390.

Am I being wildly optimitstic? Anyone care to enlighten me?

- Greg
Author: admin