What's you talkin bout willis :cool-smiley-011:

9.3:1 with the right tune and setup at 6psi and 93 octane will give you a good margin of error. Mine were as high as 9.6:1 last year with 6.2psi but I did end up breaking a crank. But that was a engine builder issue not setup or detonation I'm pretty sure. My engine builder can be a real putz at times. :lolhit:

I am afraid to go more than 8.5:1 at 5-6 psi...... It will give an effective comp ratio of around 13.0:1 it is little higher with 92 fuel.

Are you in high altitude???

No, close to seas level on the chesepeake. I don't think your dynamic compression estimate is right but don't have my chart with me at work. From memory my setup at 6psi and 9.5 was 13.4:1. With my 4.8psi pulleys it was mid 12:1s I have engines tore down now and there is no signs on the piston tops of detonation on the 9.6:1 engine. There is a broken crank though but that is a different story.

Hey Dave, I didnt know you broke a crank. Rough.

I am sure that you will have it back together for next season ready for another shot at the old single engine Kryptonite :party-smiley-004:

Dave's (Blue Thunder) boat hauls some serious ass.:drink:

I actually just got done putting the smackdown on a green activator and it broke. Pretty ugly. New block and all needed. I start assembling next week on the new block so it will definately be go time come spring. I wanted to get a couple imco shorties over the winter but that may have to wait. That was going to be my secret weapon for you come spring.. :angry-smiley-038:

Did someone know the stock 525sc rod length??

I will probably do a piston ring refresh so i think i need this info to get the right stuff....

should be a 6.135 rod.