360 Head Porting

[72barracuda]

How deep can I blend the intake guide boss tail on 360 heads? Can I blend it all the way down to the roof of the intake runner without hitting water?

 

[moparleo]

Unless you have a flow bench and have done porting before, it is best to just smooth the ports not remove a lot of material. Best results to port match the intake to the intake gasket about 1 inch into the port and just smooth the rest. If you are just" blending" the ports, you shouldn't have to worry about the water jackets. Mopar Performance sold porting templates that the novice could use and get pretty good results. Just take your time because you can't put back what you take out.

 

[72barracuda]

Thanks for the reply, I am a novice, no flow bench, following the article "double take 360" in Mopar Muscle Feb 2000. I havent worked on the intake manifold to head surface yet. I am working on the part of the guide boss that hooks over into the air flow. There is a hump there that I would really like to take down. Cant tell from the article if they did or not. I have ony worked on the guide boss material so far, widening the path but not taking the hump of the roof.

 

[72barracuda]

Actually its the jan 2000 issue for intake side http://www.moparmusclemagazine.com/...opp_0001_360_engine_head_porting/viewall.html

 

[Chryco Psycho]

I form a wing shape aroundthe guide , round into the air flow & knife edged away from the flow , if you twist the tail over to one side you can help create swirl as well , do not go too deep but you can easily form a wing

 

[moparguy]

let me know how it goes and leo I would like to know more about those porting templates

 

[72barracuda]

Thanks for the ideas, I won't take much off the bump on the roof for now and just work on the boss and ports. Maybe I can get the flow checked afterwards.

 

[moparleo]

That article said that the seats should be cut before any port work.

 

[moper]

I don't like touching the guide areas very much unless you plan to work the entire port. It's pretty easy to really mess up a head by enlarging (adding to the volume) the bowl too far and when you remove the guide boss, you add a lot of volume to that area.. The templates were great for not letting that happen. With porting, less is more in most cases...

 

[moparleo]

:icon_thumright:Absolutely.