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Quick PTV ?

  • Thread starter Thread starter Xticee
  • Start date Start date Apr 17, 2008
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Xticee

New Member
Oct 1, 2007
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Apr 17, 2008
#1
  • Apr 17, 2008
  • #1
So I've been chasing down a coolant leak and found the lower intake the culprit. Since I've already got intake off and engine drained, I figured it won't be much more to tear rest of it down and install a new cam. It already has GT40-X305 heads and SVO intake and cam is all that's missing.

My question is, will a Comp Cam XE270hr (114 LSA) with .512 lift cause PTV issues?

The Comp Cam tech said he's seen some peeps have issues and some not. Not a real clear answer. Heads are the 58cc version, so I'm thinking it'll be close. I know I will have to measure, but before I go this route does anyone have experience or thoughts on this?

Thanks for any help,
Jay
 

Grn92LX

Fidanza Man!
Founding Member
Jan 14, 2001
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Apr 17, 2008
#2
  • Apr 17, 2008
  • #2
Ive never used it nor checked it, but it should clear fine. Ive never seen anyone on the boards have issues with that camshaft.
 
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Xticee

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Oct 1, 2007
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Apr 17, 2008
#3
  • Apr 17, 2008
  • #3
Yeah I did a bit of research and everyone seemed ok with it, but every combo is different and I never did find anyone running the X305 heads with it. I was actually kinda surprised when I talked to the tech at Comp. First thing he said was that he had nothing that would work. Thanks for the reassurance, I could use all I can get.

J
 

5spd GT

"the 5.0 owns all"
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Apr 17, 2008
#4
  • Apr 17, 2008
  • #4
Best method is to check, as you are aware, but you should not have any issues.

Piston to valve clearance is not determined by peak lift.

When the valve lift hits .512", the piston is 2.168" down the hole.
 
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Xticee

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Oct 1, 2007
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Apr 18, 2008
#5
  • Apr 18, 2008
  • #5
Cool, thanks 5spdGt. You know, peak lift is all the cam tech talked about. Never overlap or even duration, which is why I had to question and ask for help.

By the way, the H/C/I write up in your sig was a big help as I was planning this project and I still refer to it often. Thanks for that,
Jay
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
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99
Arkansas
Apr 18, 2008
#6
  • Apr 18, 2008
  • #6
Xticee said:
Cool, thanks 5spdGt. You know, peak lift is all the cam tech talked about. Never overlap or even duration, which is why I had to question and ask for help.

By the way, the H/C/I write up in your sig was a big help as I was planning this project and I still refer to it often. Thanks for that,
Jay
Click to expand...

Your very welcome. Good Luck with it all!
 
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