glad I could help.

jay

Hey thanks for your reply Jay. I now see the most KR I had was about 3.9

The noise seems to be something mechanical rather than detonation.

These screenshots of the KR may help:

http://i34.photobucket.com/albums/d1...20pics/ss1.jpg
http://i34.photobucket.com/albums/d1...20pics/ss2.jpg
http://i34.photobucket.com/albums/d1...20pics/ss3.jpg
http://i34.photobucket.com/albums/d1...20pics/ss4.jpg
http://i34.photobucket.com/albums/d1...20pics/ss5.jpg

Under full load you might not see KR if it has been disabled. Even datalogging knock sensor voltage won't tell you everything you need to know because engines make so much noise at WOT.

I'm with you on the mechanical noises causing the timing wiggles in the first two screen shots. If you scroll back and forth and watch the KR it doesn't seem to effect what the knock sensors are picking up. Do you have a bunch of compression and a little cam? If your cam advanced a bunch? The timing doesn't look high enough to incur the wrath of the knock sensors unless you have a bunch of dynamic compression.

Jay compression is on the higher side, but was recommended by my head manufacturer ET performance. Running 11.5:1 according to the math. Stock bottom end, .40 head gasket and 60cc chambers. The cam is a TSP 233/239 112. Is a little on the larger side for a 346 LS1 but there are many cams alot larger than mine.

I think were going to have to throw it on a dyno and check the valvetrain. Even though the parts are all very new.

Your compression/cam match so I don't think you have a dynamic problem. I agree on the dyno thing, but you need to be able to change your timing and defeat KR on site. Any chance you could send me the tune or get me a screen shot of the timing table? I had a GMPP tune that created a similar bouncing timing problem.

Jay e-mailed you the file.