Milling 862 heads

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Apr 3, 2013 | 04:24 PM

gmcyukon

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From: Shreveport la

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?

Apr 3, 2013 | 05:23 PM

HCI2000SS

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From: Howell & Fenton MI

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

Apr 3, 2013 | 05:38 PM

gmcyukon

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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

Apr 3, 2013 | 05:56 PM

HCI2000SS

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Yep that sounds about right since mine has been bumped up one point as well

Apr 3, 2013 | 06:59 PM

Cra-Z Larry

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From: Honey Brook, Pa.

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!!

Apr 3, 2013 | 07:07 PM

gmcyukon

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He told me anything over .20 would cause the intake not to fit but .20 would be fine

Apr 3, 2013 | 08:06 PM

Cra-Z Larry

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From: Honey Brook, Pa.

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.