milling for compression- looking to gain 1 full point.

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Old Dec 18, 2002 | 10:33 PM
  #1  
spettinger's Avatar
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From: chicago, il, us
Default milling for compression- looking to gain 1 full point.

i think for every 10 thousandths off the head the compression goes up .5 points. i would like to take off 20 thousandths to up the compression 1 full point. this will be in a B16 with type r valvetrain. thanks.
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Old Dec 19, 2002 | 01:00 AM
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From: Dark Aether
Default Re: milling for compression- looking to gain 1 full point. (wreckedhatch)


.020" is only gonna get you about a .6 point increase. .030" will get you a .9 increase. You will need cam gears to compensate for the fact that this will throw off your cam timing.

Sonny
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Old Dec 19, 2002 | 01:32 AM
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Default Re: milling for compression- looking to gain 1 full point. (wreckedhatch)

i'd just do a copper spray single layer head gasket........it will get u roughly .6 of a point, then mill like .010, that should be right around 1 point.......if u wanna mill to get the desired compression your prolly gonna have to go around .040 or so/ and u don't need cam gears to compensate for the milling, unless u go about .050 or more.........i've done .030 and had no problem at all, the belt tensioner doea good job compesnating at this leven of milling


[Modified by TwistedHatch, 10:34 AM 12/19/2002]
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Old Dec 19, 2002 | 05:42 AM
  #4  
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Default Re: milling for compression- looking to gain 1 full point. (TwistedHatch)

this will be on a B16 with ITR cams and valvesprings. i have stock cam gears for it now, also a pair of skunk2's that will go on my GSR/ B16 head motor later. i would prefer to run stock cam gears now, do you think the tensioner will be able to take care of the slack if i take the middle layer of an oem gasket and mill the head for the rest of the point? does anyone have any links to compression calculator sites that include milling? thanks.
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