Milling 243/799 heads for 4.8
06-03-2016, 08:25 PM
#1
Milling 243/799 heads for 4.8
I recently bought a set of 799 heads to put onto my 4.8 to go with my Nnbs intake and wanted to know how much I should mill them and what head gaskets?
I asked over on the fb group page and generally .030 was recommended. Thanks In Advance
I asked over on the fb group page and generally .030 was recommended. Thanks In Advance
06-03-2016, 10:52 PM
#2
Staging Lane
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If you go with a thinner head gasket it will cost more than a stock set of gaskets.
Stock gasket thickness is .51, which is $35 for LS1/LS6 MLS 5 layer gasket. GM part number 12610046
If you are paying already to have them milled just mill to your desired CC chamber which will also decide your compression ratio.
What year truck?
Typically heads are milled .030 to achieve roughly a 61cc chamber on 799/243 heads, in order to make them equal to a stock 706/862 head.
Stock gasket thickness is .51, which is $35 for LS1/LS6 MLS 5 layer gasket. GM part number 12610046
If you are paying already to have them milled just mill to your desired CC chamber which will also decide your compression ratio.
What year truck?
Typically heads are milled .030 to achieve roughly a 61cc chamber on 799/243 heads, in order to make them equal to a stock 706/862 head.
06-04-2016, 02:41 AM
#3
If you go with a thinner head gasket it will cost more than a stock set of gaskets.
Stock gasket thickness is .51, which is $35 for LS1/LS6 MLS 5 layer gasket. GM part number 12610046
If you are paying already to have them milled just mill to your desired CC chamber which will also decide your compression ratio.
What year truck?
Typically heads are milled .030 to achieve roughly a 61cc chamber on 799/243 heads, in order to make them equal to a stock 706/862 head.
Stock gasket thickness is .51, which is $35 for LS1/LS6 MLS 5 layer gasket. GM part number 12610046
If you are paying already to have them milled just mill to your desired CC chamber which will also decide your compression ratio.
What year truck?
Typically heads are milled .030 to achieve roughly a 61cc chamber on 799/243 heads, in order to make them equal to a stock 706/862 head.
What should I be aiming for to work well now and maybe be able to use with a procharger set up In the future ?
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