I pulled the heads today and found greenish-tan deposits. A solid 1/16" thick or more on both the heads and pistons. I honestly don't know how the deposts on the pistons didn't hit the deposits on the heads.
Engine has ~20,000 miles and has seen mostly 100LL for it's life. I was forced to drive it as a commuter for a few months at 210 miles a day.
Anyone know what can cause deposits this bad or this color? It always detonated at low boost. 12psi was all I could run on 91 octane and 18 degrees.
Engine has ~20,000 miles and has seen mostly 100LL for it's life. I was forced to drive it as a commuter for a few months at 210 miles a day.
Anyone know what can cause deposits this bad or this color? It always detonated at low boost. 12psi was all I could run on 91 octane and 18 degrees.