Camshafts and Compression
VM,
Idle ill be a LOT smoother with more idle timing, probably wth 35-40*. You can simulate this by using an adj vac adv unit hooked to manifold vacuum [ MVA]. 5 min to test the benefit: simply turn the dist [ advancing ] with engine idling, in gear if auto. Advance until rpm stops increasing, THEN check the timing. RPM increases because engine is making more hp. Result is cooler running, better tip in response, smoother idle, more vacuum. I could give plenty of examples, here are just three:
VM,
Idle ill be a LOT smoother with more idle timing, probably wth 35-40*. You can simulate this by using an adj vac adv unit hooked to manifold vacuum [ MVA]. 5 min to test the benefit: simply turn the dist [ advancing ] with engine idling, in gear if auto. Advance until rpm stops increasing, THEN check the timing. RPM increases because engine is making more hp. Result is cooler running, better tip in response, smoother idle, more vacuum. I could give plenty of examples, here are just three: