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Author Topic:   Cam/piston clearance
MrWesson22
Gearhead

Posts: 610
From: Dacula, GA
Registered: Sep 2000

posted 03-05-2001 11:17 PM     Click Here to See the Profile for MrWesson22   Click Here to Email MrWesson22     Edit/Delete Message   Reply w/Quote
What needs to be done to stock style pistons to clear a cam with around .585 lift (with 1.73 rockers) on a 351C 4V? I'm assuming they'll have to be flycut and it won't fit stock.

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Neal
Member #723 (M&M rookie)
[email protected] AIM: MrWesson22

69 Gulfstream Aqua Grande
351C/Toploader 4sp
back in commission =)

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Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 03-06-2001 12:17 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Maybe nothing. It depends on the duration and centerline that it is ground on.

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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kid vishus
Gearhead

Posts: 1994
From: huh?? what? who? ME!?!?!?!
Registered: Oct 2000

posted 03-06-2001 06:47 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
I would clay it up first. The only time I have ever had problems with valve to piston on my C's was in a motor that we cut .055 off the heads and zero decked the block and that was with a .650 lift roller cam with 264 @ .050 on the intake, the exhaust still cleared. And that was with a domed piston.
Unless you have a a cam with some really radical duration numbers and a really strange centerline, I wouldn't worry much about it, clay it up to check it, and you will probably find you have plenty of room.

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MrWesson22
Gearhead

Posts: 610
From: Dacula, GA
Registered: Sep 2000

posted 03-06-2001 07:51 AM     Click Here to See the Profile for MrWesson22   Click Here to Email MrWesson22     Edit/Delete Message   Reply w/Quote
Sweet! I'm not sure about all the numbers yet as a friend is working out the specs for a custom grind for me. That would be fabulous if I didn't have to mess with any of that stuff to gain more clearance.

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Neal
Member #723 (M&M rookie)
[email protected] AIM: MrWesson22

69 Gulfstream Aqua Grande
351C/Toploader 4sp
back in commission =)

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Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 03-06-2001 02:09 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
There ya go!

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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