new camshaft and fine tuning the timing.

[Blackdog455]

I put a new cam in my 2.3 and the OEM specs for timing the engine are to be at 10 degrees. Since i put the new cam in (a little bigger than the stock cam) how should i go about timing the engine? My dad had it at 12 degrees and it sounded pretty good with some skips, then i put it at 10 degrees and it seemed to run smoother than just stopped running good at all.