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Milling heads for Compression
#152565
11/17/08 05:54 PM
11/17/08 05:54 PM
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Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
GwaiiEagle
OP
Mannix
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OP
Mannix
Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
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How much can you safely mill the Eddy 84cc heads in an effort to increase compression?
Last edited by GwaiiEagle; 11/18/08 06:01 PM.
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Re: Milling heads for Compression
[Re: Hughes]
#152567
11/18/08 01:45 PM
11/18/08 01:45 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
GwaiiEagle,
I assume you are asking how much can you safely mill. We have milled some of the RPM heads as much as .100" and it was fine but normally we like to stay at about .085".
Kevin
what did they cc at with .100 cut?
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Re: Milling heads for Compression
[Re: GwaiiEagle]
#152570
11/19/08 08:52 AM
11/19/08 08:52 AM
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Joined: Aug 2005
Posts: 4,799
ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,799
ILL
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At .085 off the head deck you should remove
.1045 off the intake side.
For every .010 cut from the head deck, you cut
.0123 off intake. Example 100 off the head deck, you cut the intake side .123
I also try to cut the intake runner side of the
head, it raises the port entry of the runner.
And when you cut the intake side of the head
you can use any intake manifold on the engine.
After cutting the intake side of the head you
need to port the intake runner to match up good
with the port entry.
logan426
Last edited by Logan426; 11/19/08 08:57 AM.
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Re: Milling heads for Compression
[Re: MLR426]
#152571
11/19/08 09:03 AM
11/19/08 09:03 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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right. if you cut the intake to fit the head, then you now have an intake that's only good for that engine/head combination.
if you cut the head to fit the intake, you keep the interchangability of the intake...good if you change your engine combo later, or sell the used intake to help finance a new one, etc.
**Photobucket sucks**
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