Resolved 1G Port matching FP exhaust manifold to head

[BoostBolt]

I'm trying to decide whether or not to port match my Fp exhaust manifold to my head.

On the Fp manifold, the port openings are much bigger than the ports on my 1g head.
I'm unable to find a conclusive answer as to whether I should make the ports on the 1g head bigger to match the ports on the Fp manifold.
Here is a picture of the gasket that matches the manifold.
Here is a picture of the gasket sitting on the head to show how much I would have to remove from the head.

Any help would be appreciated.

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[bastarddsm]

Stop now.

 

[curt-s]

That's about as conclusive as you can get. You will gain nothing from doing this.

 

[BoostBolt]

Thank you.
I was not sure due to getting mixed answers looking at other threads

 

[CrackedDSM]

I agree with Curt-S. You're not gonna see any gains from it.


I'm really not a fan of the FP Manifold in general, but that's neither here nor there.

 

[curt-s]

If it was the other way around, lets just say your manifold had smaller ports than the head, then porting and blending the manifold flange into the size and shape of the head ports is worthwhile. Exhaust gas slamming into an abrupt lip hurts flow and causes turbulence. This is why you see many turbine housing inlets ported and blended to match the exhaust manifold outlet when they're BIGintoSMALL.

But since your head ports are smaller than the manifold ports, the exhaust just exits out pretty cleanly (minus some tiny bit of turbulence around the lip which doesn't affect you materially anyway).

And considering the stock head ports have been proven to over 800hp.. yeah, totally unnecessary to match below that.

 

[BoostBolt]

ok, sounds like I won't do any grinding on the head.
Thank you