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Help with pistons selection and CR

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Old 02-17-2008, 04:24 PM
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Default Help with pistons selection and CR

I am going to order some new pistons for my motor. I have a Eagle crank, Copmustar rods, and need pistons for a 408 build. The motor will have Dart 225 Pro 1 heads. The pistons that I am looking at are Wiseco with a -3.2 dish. I will be using the stock 6 liter MLS gasket if I can on a .030 over block. If my calculations are right I will have a CR in the 11.78 range. I have two questions, can I use a MLS gasket on a 4.030 bore and if so then will that CR be too high for pump gas and maybe a little N2O? No more than a 150-175 shot at most. Or should I look into another set of pistons with more dish?
Old 02-17-2008, 04:27 PM
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That is assuming a piston deck clearence of .016 does that sound correct? Thanks guys, the block is a 6 liter iron block
Old 02-18-2008, 08:05 PM
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I checked today and using the Wiseco -8 inch pistons with the 6 liter MLS gasket at .064 I would have 11.3.1 Is that the correct thickness of the gasket? What other factor do I need to include in my equation?

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