hello everybody,


Dou you need a ported head to be able to max out the potential of ported exhaust manifold?


it is useless to use ported manifold if your head is not ported?


is this applies to intake manifold too?


thanks guys.

 

Porting done right should help. If you have your head apart and have the funds, send it to a pro machine shop so each cylinder port is exactly the same as the others. Personally, I'd rather have #4 cylinder (closest to throttlebody) slightly smaller since it tends to get more air than rest.
I just ported my exhaust manifold last week but won't touch my head since I'm not taking that off.

 

Not much to be had for porting the intake /exhaust manifold . Snake oil
Money is better spent on a intake or exhaust manifold.

Gains from porting can be easily skewed.

 

I agree, but if his exhaust manifold is already out, spend some time to port it right. I wouldn't touch intake manifold myself because I can't port each runner to get equal flows.

 

no real point in touching the flange that goes on the head, but rather fix both flanges on the manifold to turbo connection side...

 

I'm actually about to do this. I'll take a closer look when I get home. Are they that far off in alignment?

 

I don't see the problem. I shaved it slightly on mine to help flows away from wastegate side but nothing more. Exhaust manifold side is smaller than the turbo entrance, so I dont see a problem. Please tell me what I'm not seeing.




Turbo Inlet

On the turbo inlet, I will open up the lower right corner of the left hole to match gasket.

 

Inlet to the turbo should be gasket matched. Exhaust manifold exit can also be opened to match the turbo gasket.

I'm sure porting results can be skewed, but there are some quality porters out there...or you can do it yourself if you have the tools.

You can do A LOT more porting on that turbo hotside than you've done. Since you're in Cali, you could check out SoCal Porting.

 

Okay, I'll open up the turbo side, but I will adjust the gasket to be conservative on each side (probably stop at 1-2 mm smaller than gasket). There will always be a little play/movement when I bolt it back together and I don't want it to have any chance of gasket blocking the path between the 2 parts. I already grinded out parts of the O2 housing gasket that was in the flow path.

I'll open up the exhaust sideways where possible but I'm planning on leaving 2-3 mm metal (smaller than gasket).

Thanks!!