sleepybu

anybody useing a revers split cam in there tpi cars

( 225 in / 215 ex )

would think a cam like this would realy help a tpi motor..maybe

thanks

onfire

Well I can tell you that a split duration cam with more on the exaust than on the intake helps to scavange all the exhaust out and you do feel lots of low end torque from it. NOw for the opposite I have no experience with, I would assume that it would consume much more gas and you probably would not want to have a cycle of intake and exhaust where the intake is more because then the exhaust would not have a chance to get scavenged out since the lobe is minimal compared to the intake. I hope this is making some sence to you !! take care bro

Tibo

iTrader: (15)

you do want a split duration cam, probably not a reverse split duration cam. Some of the LS-1 guys have tried this. They have an already awesome exhaust flow design to start with though. Then they upgrade to something even better. So since the exhaust is now flowing so good the intake now becomes the restriction. So this is why they might use the reverse split-duration cam. The exhaust flow on our engines, even with Long tube headers, GOOD cylinder heads, big valves and a "D" shaped runner is sometimes not even as good as theirs.

But then there is the opposite way to look at it where if you do have an engine with all of the above exhaust up-grades (and stock TPI manifold) Then the intake is now more of a restriction. But then again I know of no one that has tried it in thier third-gen, so go for it and tell it how it worked out. Worst case the exhaust would not always escape and load up and travel back in the intake, be reburned maybe blow up. Course this is just speculation until it actually is done.

sleepybu

thats what was thinken...

D Stroy H8

... if my intake became so restrictive that I needed a reverse split duration cam to take advantage of the exhaust over the intake I think I would just work on my actual intake instead of swapping to a RSD cam. Think about this - if you use that kind of cam you need to keep the intake semi restrictive. The cam backs you into a corner because if you free up your intake in the future the cam will no longer be optimal.