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Author
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Topic: 351C rockers and cam lift?
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timjk
Journeyman Posts: 57
From:
Registered: Oct 2001
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posted 10-02-2002 10:00 PM
   
Working on a '72 351C 4 Bbl. What kind of valve lift are the stock rocker arms good for? Tim
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Just Strokin
Gearhead Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 10-03-2002 07:46 AM
If you check the pushrod to rocker clearance, you possibly could go to .600" lift or a little over. I ran a Crane solid lifter cam in a 70 351c 4v with Isky adjustable pushrods until I could afford to get a set of B351 heads. The lift on the cam was .590 and never had a problem with it.The grind I ran was F-246/3294-2-8. There were two different rockers ffor the clevelands....your probably has the correct one that help eliminate this interference problem. It only affected the early model engines. The 'good' stock rocker has a 'smooth' top along the edges. Just for your fund of knowledge, Ford did make a roller trunion kit for the stock rockers. I have never seen one other than in pictures.
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kid vishus
Gearhead Posts: 6590
From: middle of NC
Registered: Oct 2000
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posted 10-03-2002 10:09 AM
All the old Ford books claimed that anything over .550 lift with the stock rockers was asking for trouble. Supposedly they would break due to the stresss involved from the high lift. But, obviously that isnt true. However, if I were going to install a cam with lift over .550, I would put roller rockers on it. Cheap insurance.
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 10-04-2002 06:43 PM
Ditto on KV's post.  ------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA/MCA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
Professional Manwhore
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!"
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67coupe
Gearhead Posts: 491
From: dallas NC usa
Registered: Nov 2000
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posted 10-05-2002 12:30 PM
well its not the best stuff out there but crane does make a bolt on stud and guide plate kit for the cleavlands and a set of rockers for bout $170 which still is much better than stock------------------
Josh
67 coupe with 351c
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5
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