Porting books/material

Have an interesting technique, tool or just anything related to porting? Post it here . . . please no bashing anyone for the model of engine they are working, we're here to share ideas . . .

Postby Flash » Sun Aug 30, 2009 10:50 pm

coulterracn wrote:Gorden,

I've ported both small and big block Mopar heads with good results. If you've read all the books and articles on chevy heads you're and have basic porting skills you're ready. It may take more grinding to get the results you want but it's basically the same procedure.

The bowl is where you'll gain the most.

Ray

The bowl is were i lost 20 cfm from (heads i ported, with out a flow bench some 15 years ago)

My flow bench tells me i did a good job on the exhaust side though :D
Gordon
Flash
 
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Postby coulterracn » Sun Aug 30, 2009 11:17 pm

Flash wrote:
coulterracn wrote:Gorden,

I've ported both small and big block Mopar heads with good results. If you've read all the books and articles on chevy heads you're and have basic porting skills you're ready. It may take more grinding to get the results you want but it's basically the same procedure.

The bowl is where you'll gain the most.

Ray

The bowl is were i lost 20 cfm from (heads i ported, with out a flow bench some 15 years ago)

My flow bench tells me i did a good job on the exhaust side though :D

Did you do any combustion chamber work on that set of heads? Did you use stock valves?

You can shape the back side of the valve with a valve facer and die grinder with valve in drill press, then polish with flapper wheel to look like a swirl polished valve.

Ray
"I know I'm in my own little world, but it's ok, they know me here"
coulterracn
 
Posts: 183
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Location: Pascagoula, MS

Postby Flash » Sun Aug 30, 2009 11:27 pm

The problem with these heads was that i was STUPID and sucked a valve, broke a block and beat the sh*t out of that combustion chamber.
required intake and exh seats installed to save the head.

The seats left a ski jump in the bowl. Remove the ski jump straight down the bowl.
In other words there was not a 70*cut. straight down from the seat.

short side was smooth......and rounded. nothing done past there.

Made plastic tempest and made all the rest of the ports match then two.

Edit: stock valves, only combustion chamber work was to remove all the scares from the valve head beating around on that combustion chamber
Gordon
Flash
 
Posts: 285
Joined: Sun Apr 26, 2009 1:23 pm
Location: Evanston Wy

Postby coulterracn » Mon Aug 31, 2009 12:42 am

Ok that sucks. I've had seats installed in other heads but never one that was to small for the valve or to deep. That really kills air flow.

Ray
"I know I'm in my own little world, but it's ok, they know me here"
coulterracn
 
Posts: 183
Joined: Mon Jan 19, 2009 4:54 pm
Location: Pascagoula, MS

Postby Flash » Mon Aug 31, 2009 5:25 pm

coulterracn wrote:Ok that sucks. I've had seats installed in other heads but never one that was to small for the valve or to deep. That really kills air flow.

Ray

The intake seat was beat to death by a broken valve. Had a intake and exhaust seat installed.
The insert seats left a ski jump in the middle of the bowl, From machining for the insert, that i "should have' just rounded off......but no!!!! was in the bigger is better mind set then :p

Remove the ski jump and all the material, all the way to the bottom of the bowl.
Gordon
Flash
 
Posts: 285
Joined: Sun Apr 26, 2009 1:23 pm
Location: Evanston Wy

Postby Flash » Mon Aug 31, 2009 8:57 pm

Just went and CC my X and my ported head.

The ported head has 6 CC more volume then X head.........pretty sure i will be epoxying some thing before I'm done.

the exhaust side had 5 CC more then my stock X head.


So any body have some good books, threads ,sites, for my brain to Rummage though , on Mopar Small blocks 340/360??
Gordon
Flash
 
Posts: 285
Joined: Sun Apr 26, 2009 1:23 pm
Location: Evanston Wy

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