Rage

I am interested in any hard test data on engine horsepower from an engine tested with wet exhaust and then tested without wet exhaust.

Rage

ttt

Rage

How much do you think for a ~600hp NA engine?

Uncle Dave

Im searching for some data Ive seen.....

a good set of long tube headers is typically good for 25HP or more in an NA situation.

Its going to depend on a lot on the build, and exhaust manifold/header itself as well as the wet dry part.

High overlap long duration cams wil respond better to dry and be affected more.

The further downstream you mix- the less loss usually the realize.

Im looking, and should have bookmarked the data I looked at.

Uncle Dave

Rage

Thanks Uncle Dave,

I just need some hard/real numbers and the configuration/hp they came from. I'm talking ball park.

Thanks

Uncle Dave

I brought it up so the poster would know there are differences between the two.

Some guys arent aware of the drastic differences in pricing or effectiveness.


UD

Rage

I am running Dana Torque Flow exhaust manifolds with #5 risers on a heavily modified 496 . These manifilds test within a couple of hp to the CMI sport tube headers with wet exhaust.

Uncle Dave

Thats a nice manifold. Very popular these days.

When you say heavily - how heavily?

I would bet as you pass the 600HP mark the headers begin to payoff.


UD

tmbl52

what happens if you take emi aluminum risers and divert the water around them. In effect make them dry. It will probably ruin the riser im guessing

jeffswav

Like has been covered above, most likly you will see no real HP gain wet vs dry. Dry exhaust is needed to avioid reversion for really big cams. Most performance engines can use wet exhaust with long risers. If you used short risers with a performance cam reversion is likly to happen. Every engine is different and somone that runs a dyno may be more helpfull.