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how much difference in a .125" test bore?

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Old 12-04-2007, 10:45 AM
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Default how much difference in a .125" test bore?
I had a buddy take my heads in for a flowtest. They used a 4.000" test bore for my LS7 heads meant for a 4.125" bore. How much difference could that have made?
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Old 12-04-2007, 11:20 AM
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depends on a lot of things, like how much the 4.000 bore shrouded the valves. It could really make a big difference
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