Author Topic: Deck Height Difference in XT Cases Versus XP Cases  (Read 2081 times)

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Offline KilliansRedLeo

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Quote
And???

Well the second set of 372 cases had a slightly higher deck height, using three gaskets I am right at 0.024 (0.023 left 0.025 right). The 272XP piston works fine with no modifications. New bearings and seals in the case, all buttoned up ready for pressure/vac test today. Have both the stock 12B and XT intake, going to start with the 12B and use the low filter and top because it is what I have. Have several mufflers already done with 0.800 ID pipe. Best you can do on the muffler mods is 7th pulse third would be better but due to the interior dimensions of the muffler 7 is the best you can do. If you reduce the depth of the muffler be 0.500 you might get to fourth order harmonic but who knows. My bet is that the 0.800 pipe is a waste but will try it and see. Guess is that 0.374-0.500 will be better.
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