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Generation III Internal Engine
1997-2006 LS1 | LS6
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Old 04-03-2013, 04:24 PM   #1
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Default Milling 862 heads

Sups guys I going to get my heads milled but not sure to what though. It's for 5Three and its my DD. and I will be running E85. So far I have a .550 cam, Cai, and a stall. Plan on getting header and my tb ported pretty soon
But with my setup what should I get my heads milled to?
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Old 04-03-2013, 05:23 PM   #2
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I have those same heads from Texas Speed. I'd call them and see what they recommend. I wanna say mine were like .018" but I really don't recall
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Old 04-03-2013, 05:38 PM   #3
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I talk to a local machine shop and he said if I milled them down to about 1/8th of an inch and it will give you 1 point if compression
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Old 04-03-2013, 05:56 PM   #4
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Yep that sounds about right since mine has been bumped up one point as well
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Old 04-03-2013, 06:59 PM   #5
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You know 1/8" = .125, I don't know much about heads but that seems like alot!! I think I'd look for a new shop if they refer to milling your heads as 1/8"!! JMO!!
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Old 04-03-2013, 07:07 PM   #6
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He told me anything over .20 would cause the intake not to fit but .20 would be fine
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Old 04-03-2013, 08:06 PM   #7
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Yeah, I think you mean .020 is safe, .20 is .200 and I know that's too much!! I have a set of 862s that are probably going to AI for a CNC and valve upgrade but no milling, don't want to loose P2V clearance because of cam specs.
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Old 04-09-2013, 05:53 AM   #8
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When getting heads milled do I have to get a different sized pushrods? I have 7.4s now
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Old 04-09-2013, 05:59 AM   #9
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no way i would go 1/8 . talk about pushing water , somewhere i read deck is like .385 and if u take 125 . do the math
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Old 04-09-2013, 05:59 AM   #10
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i did my 317s .050
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Old 04-09-2013, 05:59 AM
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020, 20, 58cc, 862, cam, cnc, head, heade, heads, lm7, ls, milled, milling, torquer, v2


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