Originally Posted by
jamiekerr14
Just wondering, When you changed from 20% to 30% Did you add a shim at all.. as to me that could have been your issue. Pre-Detonation but Im no guru on engines.
Could be the problem. When I ran the 30% I only had enough for about 3 tanks so I didn't do much to re-tune. It looked OK by smoke
OS manual says up to 30% so I don't know.
I've ran 25% since I started that engine for the first time because I was in the habit of sharing cases of 25% last year with a buddy at the track that was running an RB engine which is shimmed stock to run up to 25%.
This post it pointless without pics. As I read back through all of my rambling I really just want to figure out how to read the engine for signs of too much compression vs. lean or both I guess
Either way I made a slight mistake. I'll be able to figure it out the hard way too I guess!
Thanks for all of the suggestions...