Originally Posted by Whitey

Did you read that the increased overlap might be preventing contamination from the reversion effects of the log manifolds?




p.s. Can the drunks go ---- up G.D and not the tech threads, thanks.

Originally Posted by fork

And I woudn't have been able to spew all that out If I were drunk. But sorry bout the spelling.

Originally Posted by Stealthmode

See, ---- like this is just better with pictures and diagrams. Where the piston is, what postition the valves are in. You know, english. It's just hard to draw pictures in your head with numbers like -4 and +2.



I guess it's just all new to me and I haven't read about how "normal" people even tune these things.

Originally Posted by fork

This is confusing because more overlap causes less cylinder pressure. the reason people raise compression, use nitrous, or turbos is to increase cylinder pressure. now he says he uses more over lap and less timing. So thnk about having a car that has too much boost or compression, and you're detonating, you would use more overlap or less timing to fix the problem. How would more overlap (less cylinder pressure) and less timing cause more power. That doesn't make much sense unless the initial tune was so bad that the spark was blowing out. I don't know but taht doesn't make much sense to me.Maybe hes got it backward and hes actually getting less over lap.

Originally Posted by fork

I don't know for sure that it's not true but why would haveing both valves open at the same time cause less exhaust to go back into the chamber.

Originally Posted by Kyle

when working with FI if you open up the intake valve the compressed air is going to come in and push the exhaust gases that are hanging around in the exhaust ports out, you'll loose a little bit of boost, but if you time it just right you could find the balance between forcing exhaust out and letting boost out.