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853 head to flycut when using 243 heads

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Old 05-17-2007, 05:32 PM
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Default 853 head to flycut when using 243 heads
Can anyone confirm that I'll be okay using a 853 head to flycut my pistons when I'll be using 243 heads? They have the same valve angle and everything right?

Thanks!
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Old 05-17-2007, 06:09 PM
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I to would like to know this.
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Old 05-17-2007, 10:25 PM
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I'm thinking that the 243, 241, and 853 all have the same valve angles. I guess I'll just have to test it with a piece of clay. Someones tested this before though I hope....
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Old 05-18-2007, 01:27 PM
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post up the results when you are finished testing because i'm very interested in the subject as well
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Old 05-18-2007, 05:23 PM
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All 4.8, 5.3, 5.7, and 6.0 heads have the same basic geometry. I used a different casting cylinder head for flycutting than what I am running on my engine. No problems.
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Old 05-19-2007, 01:43 AM
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Ditto on what Marc just posted. You could use an iron 6.0l head or a 806 head from a '98 car.
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Old 05-19-2007, 05:53 PM
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Phew....thanks guys! Just wanted to make sure

I'm going to test it anyways cause I'm a picky SOB haha
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Old 05-19-2007, 06:50 PM
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Default Rocker Pedestal = same
The rocker pedestal is the same for all the LS1/6 heads. This would make valve spacing the same.

L92's are different, with the 2.16 intake valve.

Bob K.
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Old 05-19-2007, 07:56 PM
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I'm glad to hear this now i can just use my stock 98 heads to do the flycutting i need for my livernois ls6 heads.
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Old 05-19-2007, 09:51 PM
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I used an 853 head when I flycut for my TSP stage 2.5 243's. no problems.
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