Quote: Originally Posted by
nemiro 
Actually, this is not correct, either. What actually happens is that there is too much oil in the head, and it pumps up the lash adjusters, which will slightly overextend at these pressures and volumes. This holds the valve open, instead of letting it close all of the way, causing pumping losses. That's why the engine loses power in that regard.
well that is what i said, excess oil preventing the valve to move like needs to, holding the valve open is the effect known as valve float. i didnt take into account the lash adjusters, thank you for that info, now i remember nemo telling me about it.
Quote:
As for losing power at 6200rpm, timing and tune certainly affect it, but the head is simply running out of flow up there. Even with big cams, the cars are falling down in that area. They do not pick up again, torque is on a downward spiral starting by 5800rpm at the latest. Big cams seem to hold it up a little longer, but that's all. Cars with headwork, and the supporting mods to handle high rpm will make power a little later.
like i said this dips were seen in big turbo, built motor flashed cars, and timing was shown to be poor.
Quote:
Other than that, all you are doing is making some cool sounding noise.
so you think there are no benefits of higher redline other than the sound?
i have a built bottom end, head, and a bigger turbo, i only want to rev as high as my power curve will take me, i know after all i have done is damn sure higher than 6200 rpms.
