Ported AFR 220 heads pre eliminator

[Carnut1]

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Bought new in early 90's ported and never used. AFR 220 ported to 237cc 2.125 / 1.625 REV valves. Chamber cut for 4.03 bore. I need to step up my game and I could use some input. Thanks, Charlie

[Carnut1]

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Early 90's porting. Rough cuttered intake and 200 grit exhaust polished.

[Carnut1]

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Intake ssr very high and protruding.

[Carnut1]

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Exhaust ssr very high as well.

[Carnut1]

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Calibrated sf 600 flows. Fair but not great for such a large port and big valves.

[Carnut1]

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Basic intake port layout measurements.. Pitot testing states high speed all across the ssr but a nice speed progression from pinch to valve seat. 5/16 flowball reduced about 5cfm nearly everywhere between .4" to .7" lift so I feel the basic port shape is ok. All input is welcome. Thanks, Charlie

[pcnsd]

Can we see the intake looking from the manifold side?

[Carnut1]

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Not my best pic.

[mag2555]

What level of Intake flow do you have with the valve out?
You should have atleast 300 cfm @.500" with a port that size and a valve that size , so I am thinking more along the lines of chamber shrouding.

[Carnut1]

What level of Intake flow do you have with the valve out?
You should have atleast 300 cfm @.500" with a port that size and a valve that size , so I am thinking more along the lines of chamber shrouding.

I will give it a flow, I was thinking the same thing last night. Chamber is ok but not my best work. I am sure this will be bolted to a 400+ cube motor when I am done so a full chamber work up is in the future. Thanks, Charlie

[mag2555]

I just got done confirming the flow on a AFR LS1 with a 2.02 valve and it was flowing 300 cfm@.500" , 2.02" is pretty close to your throat size!
Can you post up a picture of what a lenght of Solder looks like if your rap it around the center of the whole short turn , its lenght should go from the chamber wall to the crown of the short turn.
Here's a picture of such from a 1979 Pontiac Iron head I was working on over the weekend that was flowing 280 cfm.
The throat on this head was 1.80",or 85%.

[Carnut1]

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Very light solder, but all I had at home. Basic ssr shape, .878" tall.

[Carnut1]

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Intake floor shot.

[Carnut1]

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Intake ssr before cutting, this will be a small change hoping to inch up on gains.

[Carnut1]

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Before intake ssr.