DIY Port Molds (for home porting of your cylinder heads)

[Careless]

Hi dudes, and dudettes.

 

In my efforts to find some information on port molds as an alternative to expensive CAD and 3D rendering methods to which I have no access to, I've come across some interesting websites that will make you feel better about doing this on your own if you decide to do some home porting.

 

http://www.diyporting.com/molds.html

 

TAP Products makes these products here:

 

http://www.tapplastics.com/shop/product.php?pid=61&

 

and instructions on using them are located here:

 

http://www.tapplastics.com/uploads/pdf/Moldmaking%20Directions.pdf

 

http://www.fordmuscle.com/archives/2006/12/MakingMolds/index.php

 

Lets post some more information on port molding, specifically, if you have come across and bookmarked any.

 

I know it's often too much to ask of L or RB head experts to post what they do to their ports to achieve certain goals, but anyone else who has discovered some things worth mentioning for either engine while doing basic home porting should post here if they don't consider their findings top-secret and would like to contribute their tips and strategies to n00bies like myself.

 

I find that most engine builders in my area are not really reknown for head-porting, and are all hand port specialists, and use no flow-benches or just assume their modifications are better rather than worse for just about any application. So from now, until the time my head makes it here from Japan, I'm going to be researching the topic of home porting, and possibly practice on one of the junk honda heads I have laying around in my room-mates backyard from the scrap engines we've collected. Just to get a feel for the tool and port shaping =).

 

lets port!

Raff

[jbk240z]

Very interesting post indeed!

Thanks for posting!

[tube80z]

I find that most engine builders in my area are not really reknown for head-porting, and are all hand port specialists, and use no flow-benches or just assume their modifications are better rather than worse for just about any application. So from now, until the time my head makes it here from Japan, I'm going to be researching the topic of home porting, and possibly practice on one of the junk honda heads I have laying around in my room-mates backyard from the scrap engines we've collected. Just to get a feel for the tool and port

 

There's a good book you need to get by John Dalton called DIY gas porting. Search Amazon and you should find it. It may have a different title now but I believe it's back in print. He has DIY ways to make molds and a flow bench.

 

When I used to do this I made a few molds to port heads I didn't want to destroy. Then I made a number of guages up that you inserted a certain depth down the port to get the shape I was after. These could be based off molds but are a more realistic way to do this work.

 

And these days if you do one cylinder and get it to where you like there are companies that can put this into CNC and do the rest of the head for a reasonable cost.

 

Hope this helps,

Cary