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  351C rockers and cam lift?

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Author Topic:   351C rockers and cam lift?
timjk
Journeyman

Posts: 57
From:
Registered: Oct 2001

posted 10-02-2002 10:00 PM     Click Here to See the Profile for timjk   Click Here to Email timjk     Edit/Delete Message   Reply w/Quote
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

posted 10-03-2002 07:46 AM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
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

posted 10-03-2002 10:09 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
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

posted 10-04-2002 06:43 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Ditto on KV's post.

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Alex Denysenko
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67coupe
Gearhead

Posts: 491
From: dallas NC usa
Registered: Nov 2000

posted 10-05-2002 12:30 PM     Click Here to See the Profile for 67coupe   Click Here to Email 67coupe     Edit/Delete Message   Reply w/Quote
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

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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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