Originally Posted by recon chris
I thought "retarding the spark" or making the engine spark later was what this engine needed at high rpms? Unless you engine was already very retarded to begin with i thought that should have helped?
According to what Manic Mechanic has said, the ignition timing is already very retarded to begin with.
I'm confused though. I thought he said we need to advance the timing, but in the his picture it looks like the timing is retarded.