[sr71bb]

If you look back up in this thread you will see where I had an issue with my 416 and I cracked ONE of the pistons. THAT engine had somewhere between 13.5 to 14.0-1 compres sion. Rear wheel HP with this engine was around 582.

When LME rebuilt the short block THIS TIME they used a 4.080 piston resulting in a 418 CI displacement. They ALSO used a slightly LOWER dome on the piston. This resulted in about a 12-12.5 to 1 compression. This resulted in slightly less RWHP which was confirmed by a DYNO yesterday (570 RWHP) with torque around 525 (about 10 less).

WHY you may ask???

Well I also run E85 but on rare occassions I did have to run 93. So the thought was a little bit LOWER compression and a little less timing (about -1.5 degrees) would be prudent given this car is also a daily driver.

I also had toyed with the idea of a larger cam which would have resulted in RWHP being being beyond the 600 mark BUT driveability would have suffered especially since I am a running stock converter A10.

First race of this year will be at EAGLES CANYON RACEWAY on April 6th with the NASA boys. Will feedback some track times after that. My fastest time to date was around a 2.02 CCW.