Camshafts, idle quality, driveability and LSA-REAL WORLD EXP and OPINION

joec said

OK tough guy If you advance a cam the intake is open more than exh on overlap , straight up they are open equal, retarded exh is open more than int.If you do a quick check when a cam is advanced the int lifter is always open more than the exh. therefor there is less curtian area on int to try to control reversion .Any other stupid remarks you would like to make?In the meantime go back to your google answers.

Click to expand...

First off all, that's not what you said at first. So you are teachable.

Second, reversion has less effect at overlap than intake closing. You can't be that hard headed can you? It's fairly simple to test.

If you know how far the valves are open at TDC, you will see that even with a very wild cam, overlap lift is very little. You can over scavenge out the exhaust. You can dilute the intake port with some exhaust. But reversion is mostly a product of intake valve closing.

Until that is pressed to the front of our minds, we will still make stupid camshaft decisions.

I'm thinking of starting a thread, but I'm going out of town for two days and won't be around.

When I get back, we can discuss things OTHER than LSA and see if we can learn from each other. I don't want it to be like the dog returning to his own vomit. Gotta tread new ground.


Plus, jpar gets all jiggy when I start a thread.