Lean pop will get the power valve every time at least on the older Holly's...13 this and 14 that is over my head.In the old days we did out tuneing by looking at spark plugs. I even saw "The Cat in The Hat" still doing that on a NASCAR show the other day !!! J

Last edited by SCRAPIRON, #4711; 10/27/11 06:40 PM.
Jerry Davis II#4711



ol Smokey said "one test is worth a thousand expert opinions."