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Old 02-14-2006, 11:49 PM
1 Hammerman 1 Hammerman is offline
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Default 6x heads
what are better heads for 69 400 6x-4 or 6x-8

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Old 02-15-2006, 02:27 AM
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kookykrispy kookykrispy is offline
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6x-4 91cc 8.69:1 compression ratio on a standard 400
6x-8 98cc 8.21:1 compression ratio on a standard 400

The 6x-8's are great heads for street performance.. especially after you have them milled to increase the CR. .050 inch off will lower the combustion chamber size by about 10cc's... 81cc chambers would give you 9.5:1 CR... perfect for the street and they will still live on high octane pump gas

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Old 02-15-2006, 12:51 PM
69birdboy 69birdboy is offline
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I think he meant to say 6x-4, not 8.

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