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Milled GT40 Heads???

  • Thread starter Thread starter 1989SCZ
  • Start date Start date Jan 22, 2009

1989SCZ

New Member
Jan 21, 2009
6
0
0
Jan 22, 2009
#1
  • Jan 22, 2009
  • #1
okay, im looking to buy a set of F3ZE GT40 Explorer Heads for $87 each. As well as a GT40 Explorer Intake (price unknown yet).

How much am I able to mill before piston to valve clearance becomes an issue with the following:

-Stock cam with possible 1.6 or 1.7rr?

-Aftermarket cam with .500 to .550 lift and possible 1.6 or 1.7rr?

Will milling .030 cause problems with lower manifold to head alignment?

It would be great for some help, i know there are forums on here similar to this, but the information is scattered and I've tried my best to search and get some ball park estimates.

I am mainly trying to get a list of possible issues and problems that could arise from this swap beforehand.
 

Mr. Rustypwnz

Advanced Member
Jun 1, 2005
1,761
63
69
indianapolis/ valdosta ga
Jan 23, 2009
#2
  • Jan 23, 2009
  • #2
as long as you stay around .030 your intake will bolt up fine, and you should be able to squeeze around .530ish lift out before it gets close with those heads, I know i ran a .512 lift cam on ported and milled e7's with bigger gt40 valves and I had room to grow if needbe..
 

maxine-70

20+ Year Stangneter
Mar 27, 2003
273
1
18
louisville, ky
Mar 10, 2009
#3
  • Mar 10, 2009
  • #3
im running a TFS stage 1 (.499/.510) on my real gt40's milled .030. i reused the stock rockers and just put .030 shims under them. no issues at all
 
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