Quote Originally Posted by donniekak View Post

If I recall, Chris hill was trapping 140 in the 1/4 with a fwd 10:1 setup to.
What it comes down to is tuning ability. The area between running great, and blowing up gets smaller the higher the compression is.
Yeah, But I don't think he was on pump gas when he did those runs. He also didn't care if he broke anything as he would just slap in some new/used parts and do it again. I spoke with him a bunch about it when I first started my project.

Quote Originally Posted by NickS VR4 View Post
Just as the chart showed earlier. If you change the compression, and the boost levels stay the same, the internal cylinder pressure will go up. Pressure and Heat create knock. Unless you are able to change the heat, the increased pressure will, IMO, generate knock.
Yeah was the problem I run into. EGT's too high. That was the reason to move to the FMIC and then Meth injection. I had to keep the intake charge cool to keep the EGT's down. I'm also running a little richer to help cool things down. The knock always seems to be around the 4k mark when it hits. So with the emanage in their now and more fine tuning and timing control, I hope to really be able to push things on this engine.