What Degree of Timming Should I Use?- 4.2L w/ 4.0L
Well I finally took out my CJ this weekend in order to begin "breaking in" the engine. It runs much better than before.
I have a '82 4.2L block, 4.0L head, Crane Cams H-260-2 camshaft, clifford intake, 390 cfm carb, and factory headers from a Cherokee.
My question: What should I set my timming to? Should I use 6-8 degrees BTDC?? I want to set "optimal" timming, if that exists.
I know how to set the timming, its just that since I have a "performance" cam, different intake, and carb I don't know if I should use the stock timming value. The engine has about 20 miles since I rebuilt the engine. Also, should I wait for the engine to "break-in" more until I set the timming? It's running fine right now, no pinging.
I've done a search for this question, but most timming posts are how to install the timming chain or set the distributor.
Thank you for your help.