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Fcam Valve to Piston Clearance Question

  • Thread starter Thread starter reefbluelx
  • Start date Start date Mar 16, 2007
R

reefbluelx

New Member
Mar 16, 2007
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Mar 16, 2007
#1
  • Mar 16, 2007
  • #1
In stalled an Fcam in a '93 stock short block with cast iron GT40 cylinder heads, mocked up the engine without head gaskets and checked valve to piston clearance during overlap, minimum intake valve clearance was .072 inches and exhaust minimum clearance was .125 inches.
Heads and block have never been cut.
Currious to know if anyone else out there has a similar combo and what sort of valve to piston clearances you got.
I was expecting the exhaust clearance to be less than the intake are my results typical.
Just want to confirm I'm on the right track.
 
W

wifehatesit

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Oct 30, 2006
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Mar 17, 2007
#2
  • Mar 17, 2007
  • #2
intake to exhaust clearance ratios are affected by advancing or retarding the cam. ie, you can increase intake and decrease exhaust by changing the cam timing.
 
W

wifehatesit

New Member
Oct 30, 2006
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Mar 17, 2007
#3
  • Mar 17, 2007
  • #3
not necessarily that youd want to though...
 
R

reefbluelx

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Mar 16, 2007
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Mar 17, 2007
#4
  • Mar 17, 2007
  • #4
wifehatesit said:
intake to exhaust clearance ratios are affected by advancing or retarding the cam. ie, you can increase intake and decrease exhaust by changing the cam timing.
Click to expand...

I understand that advancing or retarding the cam will impact VtoP clearance and that is part of my concern, are my results typical for a cam installed straight up?
Anybody check VtoP Fcam with GT40's stock block?
 
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