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Old Jan 11, 2009 | 08:10 PM
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I was wondering the valvle angle on the 241 heads?

Also I am using a 13:1 pistion. with the 241 head, The reason I am so concerned is I am going to be using the Vindicator II cam 240/244 .608/.596 113+2 LSA. but I am noT sure what head gasket I should start with. I was planning on starting with the GM MLS .051 for starters, then using playdoh to see what the piston to valvle will be. But If I can get away with using a .035 or .040 gasket with no issue I am going to do that the first time around. Any comments with be helpful and thanks in advance.
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Old Jan 11, 2009 | 08:16 PM
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Well, with an aftermarket piston, you should have plenty of ptv. The relief in the pistons should give you safe ptv.
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Old Jan 12, 2009 | 09:04 AM
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Ok well should I stay about .06 ptv then?
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Old Jan 12, 2009 | 09:23 AM
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Valve angle on 241's would be 15 degrees.

Are you planning on running a custom piston or a shelf piston. If you are building a custom piston, tell the piston manufacturer what gasket you want to run and they will build it accordingly. Also, you can ask them what gasket to run. I would think if it is a shelf piston, a .040 would be fine. As mentioned above, you will have reliefs in the piston so PTV shouldn't be an issue.

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Old Jan 12, 2009 | 12:46 PM
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Originally Posted by Jon@Texas-Speed
Valve angle on 241's would be 15 degrees.

Are you planning on running a custom piston or a shelf piston. If you are building a custom piston, tell the piston manufacturer what gasket you want to run and they will build it accordingly. Also, you can ask them what gasket to run. I would think if it is a shelf piston, a .040 would be fine. As mentioned above, you will have reliefs in the piston so PTV shouldn't be an issue.

Jon
I agree entirely, I am wanting to basicly run the smallest gasket possible to get a few more pts. out of the compression. I milled the heads .006 and took .0015 off the deck of the block just so both mating surfaces were true. Now I am awaiting for the rest of my machine work.
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Old Jan 12, 2009 | 01:23 PM
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You might check how far the piston comes out of the hole before buying gaskets.
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