Ok I am porting my 289 heads

What did you use for that mold?

I want to use it on my 200 I6 head!


FE
[addsig]

It is just Red RTV.

Go over to Http://www.diyporting.com and look for 'Making port molds' He explains it much better then I could. It is supprisingly easy to do ! [img]/forums/images/smiles/icon_smile.gif[/img]
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Rusty

<font size=-1>[ This Message was edited by: rusty105 on 1/7/07 8:34pm ]</font>

OK, I poked and prodded around these heads, and I still can't tell if there is water inbetween the intake and exhaust bowls. Any clues guys??

And if there are any other places to look out for water let me know [img]/forums/images/smiles/icon_smile.gif[/img]

Thanks
Rusty
[addsig]

Anybody?

Originally Posted by rusty105

OK, I poked and prodded around these heads, and I still can't tell if there is water inbetween the intake and exhaust bowls. Any clues guys??

And if there are any other places to look out for water let me know [img]/forums/images/smiles/icon_smile.gif[/img]

Thanks
Rusty
[addsig]

There is water between the ports. It is circulated around the exhaust port to keep things cool.
The best home porting job increases the mouth of the port to the size and shape of the gasket and blends that into the port for about 3/4". Smoothing the floor of the port to make it easy for the gasses to follow and blending the shape to a decreasing curve from the pocket to the mouth will provide gains in performance. Taking the bumps out of the roof and carefully blending it to the existing shape will reduce the turbulence and remove the restriction of the hump without causing more with the hole in the roof.
I am not sure where you can get porting templates any more. I used to get them from friends in the the performance industry. Ford, Chrysler and Chevrolet used to have them available upon request for racers and those who supported their racing programs. If you can get drawings (engineering) of your ports you can use the cross sections and the sectioned runs to make a complete set of porting templates.

What kind of HP gain can be made if the 289 heads are full ported out like this ? Looks good COOL

The biggest gain you will find is by putting a 1.600 dia exhaust valve and a 1.88 dia intake valve, All the flow goes down the TOP of the ports, both in and ex. do not waste any time on the floors, What I have done for people who want to try this is port one in and one ex port to show them what works, then they try to copy it,If you dont have a flow bench to measure your work, there is NO way to tell what your results will be. A fully ported set of heads on a strong 289 or 302 can be worth as much as 45 HP. A mild port job is worth 20 to 25, IF you dont do anything stupid.


JOE SHERMAN RACING ENGINES

im do stupid things frequent joe, lets here some examples.

25 years ago, when I was did many pairs of SBF heads, the ports would always come out looking like a "D" shape. This porting job was good for about 40 HP with the 1.54 valves. On this set of 69 quencher chamber heads, (stock with 1.84 and 1.54) I also had 1.94 intakes installed.

The lower right hand side of the exhaust port, there is a water jacket for the spark plug. Watch out for it.

Hard to see in this photo, make sure you de-sroud the intake valve, on the chamber side, that will help a lot too. These heads pushed my 4000 pound Torino to a 13.5 second 1/4 when on my 351W.

deshrouding is inside the chamber right? Is there anything to be gained by that on a Aussie2V? It looks like the big intake valve is right against the side of the camber which will really block flow? Am i wrong?