quote:Originally posted by Dr.Oldsmobile:
Interesting... So you are saying that, in a way, I am looking at this backwards...
If revision is inveitible with this cam, then the solution would be to cover it up with a traditional manifold and allow it to steal air from another cylinder instead of from to top??
If that's the case, would it be best to:
1. Use a single plane manifold to encourage the scavenging.
2. Use a dual plane manifold?
3. Turn up the stereo and ignore it?
Thanks
G
Turning up the stereo might be the best remedy.
Seriously, you have to be sure the popping sound is being caused by reversion. You will have to study and observe the airflow into and above the throttle bodies to confirm it.
In a common plenum manifold one cylinder does not really steal another cylinder's air, the reversion in a runner is caused by the intake valve suddenly closing and the flowing air in that runner suddenly hitting and bouncing off the back of the intake valve. Like water hammer in your house when you suddenly turn off a faucet.
In individual runner intakes this rebound energy is wasted, but in common plenum manifolds that rebounding air flows across the plenum and into a cylinder with a open intake valve (supercharging it a little).
IR intakes do look really cool but probably work best at a specific tuned length for a specific rpm range.
A common plenum intake with multi point injection may be best for a wider rpm range and better driveability.