I finally dynoed my motor at Tom Earharts. 565cid std. deck, hand ported 325cc Pro one heads, tunnel ram, fuel injected, hydraulic roller. Here are the results.

..rpm............Corrected torque.............CHP

1500.....................516...................... ...147
2000.....................569...................... ...217
2500.....................591...................... ...281
3000.....................601...................... ...344
3500.....................655...................... ...437
4000.....................657...................... ...501
4500.....................714...................... ...612
5000.....................720...................... ...685
5500.....................687...................... ...720
6000.....................655...................... ...748

Wow! Very impressive. How radical is this motor? What is the compression ratio? What are the cam specs? Whats the expected lifespan on the valvetrain?

I need details!

Ron

Hey Jim, How much compression is that motor?

The motor is 10.5:1, runs on 92 octane. It likes 33 degrees of timing. We tried different timing, up to 36 (with race gas) and didn't make anymore power. The cam is our grind, .648 lift (same cam as our 540's) and is very user friendly at the dock with a carb or efi. We have been running this valve train set up with great success, lifter/ valve spring change recommended at 300 hrs. The power fell off after 6000 which is OK for a pleasure motor.

Hmm. So what do you think? Same heads on a 565 with 12.5:1 compression with a single dominator on a Dart intake with a solid roller should be 800 plus HP. Ya think or not?

looks good Jim ,

WETTE VETTE

I'll bet it would be close


bobby daniels

thanks!

Jim
Sounds like a pretty stout motor
You still coming down in May? We race Marathon May 16th

Dan

Dan

I'm going to try, 50/50 chance right now. I have a lot of work to get done. I will let you know either way.

Jim, those torque numbers ought to hold you back in the seat for a while!!!!....WoW.....Nice Job,....Fred