I have never heard of this

darkhorse50 · April 23rd, 2009, 04:46 PM

Ok, the guy that is doing all the work on my heads (gt40) said that if I have .020 milled of the heads, I would also have to have my lower intake machined to keep the correct angle V-shape if you understand what Im saying. I have never heard of this in my life and I was wondering if anyone has had any experience with this sort of thing. This is my first motor build so I'm learning as I go along

1slo5.0 · April 23rd, 2009, 05:05 PM

I doubt you will have to with only taking .020 off the heads. But that is correct info. If you mill alot off the heads you sometimes have to cut the intake so it fits.

**Chris** · April 23rd, 2009, 05:10 PM

You can mill up to .065 off of GT40's safely.

darkhorse50 · April 23rd, 2009, 07:25 PM

So, .020 shouldnt effect the V-shape good, my machine shop bill is grow exponentially it seems

JBIGBOOTSY · April 23rd, 2009, 07:57 PM

Dont forget to shim yo rockas! .020"

darkhorse50 · April 23rd, 2009, 08:55 PM

ya I know im gona need to shim my rockers .020 to keep proper valvatrain geometry, but im a hell of a long ways from that point, thanks though jbigbootsy.

darkhorse50 · April 23rd, 2009, 10:21 PM

oh by the way, since im taking .020 of the heads, im going to have to run a shorter pushrods right?

**Chris** · April 23rd, 2009, 10:26 PM

Originally Posted by darkhorse50

oh by the way, since im taking .020 of the heads, im going to have to run a shorter pushrods right?

That would be what the shims are for.. to raise the rocker arm.. keeping the pushrods the same length.

superbean · April 23rd, 2009, 11:26 PM

two thou wont require an intake mill. A nice set of felpro gaskets will take up the slack.

April 23rd, 2009, 04:46 PM	#1
darkhorse50 Regular 87 GT 14.2@98.something Join Date: Apr 2008 Location: N.E Ohio Posts: 118 iTrader: 0 reviews	I have never heard of this Ok, the guy that is doing all the work on my heads (gt40) said that if I have .020 milled of the heads, I would also have to have my lower intake machined to keep the correct angle V-shape if you understand what Im saying. I have never heard of this in my life and I was wondering if anyone has had any experience with this sort of thing. This is my first motor build so I'm learning as I go along

April 23rd, 2009, 05:05 PM	#2
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	I doubt you will have to with only taking .020 off the heads. But that is correct info. If you mill alot off the heads you sometimes have to cut the intake so it fits. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

April 23rd, 2009, 05:10 PM	#3
Chris Regular 1989 LX Coupe Join Date: Oct 2007 Location: St. Pete, Fl Posts: 377 iTrader: 0 reviews	You can mill up to .065 off of GT40's safely. __________________ 7.87 @ 93 mph http://www.youtube.com/watch?v=ZwEEQUYY8gA

April 23rd, 2009, 07:57 PM	#5
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,391 iTrader: 0 reviews	Dont forget to shim yo rockas! .020" __________________ Bolt-on Abraham Lincoln Log motor. With extra wiring.

April 23rd, 2009, 11:26 PM	#9
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	two thou wont require an intake mill. A nice set of felpro gaskets will take up the slack. __________________ weeee foooord!

April 23rd, 2009, 07:25 PM	#4
darkhorse50 Regular 87 GT 14.2@98.something Join Date: Apr 2008 Location: N.E Ohio Posts: 118 iTrader: 0 reviews	So, .020 shouldnt effect the V-shape good, my machine shop bill is grow exponentially it seems

April 23rd, 2009, 08:55 PM	#6
darkhorse50 Regular 87 GT 14.2@98.something Join Date: Apr 2008 Location: N.E Ohio Posts: 118 iTrader: 0 reviews	ya I know im gona need to shim my rockers .020 to keep proper valvatrain geometry, but im a hell of a long ways from that point, thanks though jbigbootsy.

April 23rd, 2009, 10:21 PM	#7
darkhorse50 Regular 87 GT 14.2@98.something Join Date: Apr 2008 Location: N.E Ohio Posts: 118 iTrader: 0 reviews	oh by the way, since im taking .020 of the heads, im going to have to run a shorter pushrods right?

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