Well, I recently got a extra exhaust manifold, So I decided while Im waiting on my IC piping to get tigged up, I was going to port the exhaust manifold. I used a Carbide bit and a air die grinder. A buddy of mine came over and helped smooth everything out. This is the first time I have tried anything like this. Changes I am hoping to see, Faster spool, alittle more HP and Tq along with more powerband up higher in the revs. I also ported the exhaust housing of the turbo to match the newly ported exhaust manifold.
Here are the pics.
Here is the Stock exhaust manifold with the larger opening gasket.
Here is the ported manifold
Comparo side by side
stock vs ported close up..
Turbo exhaust housing.
Tell me what yall think...