I read somewhere that sometimes, guys that port heads add material to the heads in certain cases to imporve airflow. I was wondering, I have an intake manifold that was ported out to match felpro 1205 gaskets. Can the same thing be done to kind of make the manifold ports smaller? Like what if I wanted to return the ports back to their stock size? Thanks.

 

The use of epoxy or cold weld isnt done to improve airflow so much as to improve velocity or reduce turbulent dead-spots in teh port. I dont think that reducing your runner diameter is going to help much: Most of your air flow volume and velocity improvements are made directly underneath the valve, around the guide, and down the short-side radius.

 

Sure but can it be done to an intake manifold? I just want to return the intake manifold ports back to stock size.

 

Yes, buy why?

 

Because I used to have 200cc intake runner heads, and my intake manifold was ported out to match felpro 1205 gaskets. But, I'm switching back to heavily ported stock L98 iron heads for a turbo application. I'm going to get rid of my current heads to help pay for the turbo. If I use cold weld, or epoxy, is there any risk of that stuff coming off and going into the combustion chamber and messing stuff up?

Also, this is something a shop should do, right?

 

1. Yes.

2. No.

Any epoxy has the potential to loosen, fall off, and lodge in a valve or wander through the combustion chamber.

Most any repair shop would likely refuse to fill the ports with an epoxy, due to that potential liability.

Your best bet may be to get a different intake, or gasket match the replacement heads to the intake.

 

If you have a buddy that can weld aluminum that would be the only way i would want it done, getting a shop to do it will probably cost more than a new intake.

i would hate to see a piece of epoxy or jb weld go into the combustion chamber, so only do it as a last resort.

 

Thanks guys. Looks like I'll just keep the 200cc heads and run a larger turbo since I can flow more air.