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Author
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Topic: Put my new cam in tonight....piston to valve issues again!
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rustang@home
Gearhead Posts: 134
From: Clarion, PA
Registered: Jan 2004
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posted 02-13-2005 09:18 PM
  
stupid pistons and stupid valves  So I'm wondering how much piston to valve clearance I can get away with. Right now I've got about .027 on the intake, but I know of guys claiming they're running their stuff in the .030-.040 range, maybe .050 on the exhaust. Anyone running this tight and getting away with it? [This message has been edited by rustang@home (edited 02-13-2005).]
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capri man
Gearhead Posts: 7221
From: doerun, ga.
Registered: Nov 2000
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posted 02-13-2005 09:24 PM
that would scare me just a little!! course i dont guess it would ever hurt anything if you dont float the valves!! good luck------------------
mike r
racing is real
everything else is just a game.
81 capri-302-7.29 @92mph 1/8
1.54 60 ft.
http://community.prestage.com/Member+Pages/789.aspx
M&M member #839
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n2oMike
Gearhead Posts: 2680
From: Spencer, WV
Registered: Jan 2001
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posted 02-13-2005 09:55 PM
If the engine is still on the stand, just turn it upside down and take a die grinder to the valve reliefs. That's what I do. Plain ole' TRW/Speed-Pro forged pistons rarely clear valve reliefs. I haven't had a set yet that didn't need widened to clear 1.94"/1.60" valves in factory heads.Good Luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 02-13-2005 09:59 PM
Yup.
Especially if you are running anything over .570 lift with big valves.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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