Head Shaving/ Milling and CC reduction ? - Hemi Truck Club
 
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Old 10-31-2017, 06:19 PM   #1
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Head Shaving/ Milling and CC reduction ?

Hi guys ,
I was wondering if anybody has figured out the cc's of our heads when they have been shaved / milled ?
First what heads you worked on / 03-08/ Apache etc.
Maybe original cc's.
How much you have shaved your heads .005 , .010 , .020 . etc.
CC's after milling

Thank You

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Old 11-01-2017, 10:29 AM   #2
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don't the cc number, but I milled my 05 heads .020 and picked up a full point in compression ratio
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Old 11-01-2017, 10:33 AM   #3
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Anybody else ?
What's your experience in Head Milling ??
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Old 11-01-2017, 11:24 AM   #4
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Many folks dont go into detail about their heads. There are many things that attribute to the exact chamber cc. 03-05 heads 84cc and as you mention some are milled, mostly no more than .030", some have chamber work and valves replaced and then there head gaskets that generally range .028 thru .080. There are even thicker gaskets but not commonly used. And then there are a lot of piston configurations to raise or lower overall cr. There is plenty of information abailable to research if you have a specific question you want an answer for.
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Old 11-01-2017, 01:36 PM   #5
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I had the heads on my 05 milled .030 and it raised the cr from 9.6:1 to 10.23:1 Also had the P&P as well a bigger valves installed. But was not told the cc.
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Old 11-01-2017, 06:24 PM   #6
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Redtruck, other's thank you for the input, I am working out configurations for my stroker build (383 or 392) , and one factor is the compression ratio, I am wanting about 10:1 - 10.5:1 , 10.25 is the target I think, but most piston sets are 9, 9.5:1 , or they go the other way with 11.5 - 12.5:1 compression.
I have an 03 ,stock 85cc or 84cc heads, AND THE 03 PCM , and I don't want to swap the PCM to a 2005..... YET...... I'm thinking I want all I can get as far as compression,free HP/TQ, but I want to use pump gas 91 , or maybe 89 in a pinch. So I'm just kind of wondering about how much I would have to mill the heads to achieve this target CR. AND it also effects the length of the pushrods , and I'd like to have that kind of figured out beforehand as well.
So that's why I'm interested in how much cc reduction by milling our heads .
I also thought that other people may be in the same boat , and it would be helpful to them.
Thank You all
love the input !!
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Old 11-01-2017, 06:41 PM   #7
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Maybe go at this a little different by using a 11:1 piston and a thicker head gasket to drop the cr a little. Good luck using the 03 pcm..
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Old 11-01-2017, 06:51 PM   #8
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Quote:
Originally Posted by Redtruck-VA View Post
Maybe go at this a little different by using a 11:1 piston and a thicker head gasket to drop the cr a little. Good luck using the 03 pcm..
That's a good point.
I was looking at all the Cometic gasket thicknesses over the weekend and WOOO !!! I had no Idea they made that many for just the 5.7 hemi
That's partly why I started this link ( MORE RESEARCH !! ) = LESS ^%%^&(^%(% swearing down the road .
thanks again
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Old 11-01-2017, 09:21 PM   #9
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Quote:
Originally Posted by Redtruck-VA View Post
Good luck using the 03 pcm..
And thus one of the reasons that I am doing soooooo much reasearch on this build !!!!
The dreaded 03 PCM !!!
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Old 11-02-2017, 12:21 AM   #10
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Quote:
Originally Posted by ATXHEMI View Post
I had the heads on my 05 milled .030 and it raised the cr from 9.6:1 to 10.23:1 Also had the P&P as well a bigger valves installed. But was not told the cc.
So I was just curious what method did you/they use to figure out your CR after the milling ??

thx
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