Adjustable rockers vs non adjustable
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Junior User
Joined: Dec 2004
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Adjustable rockers vs non adjustable
Hi
I have a 352 that has the adjustable rockers and my old engine did not. My question is are the actual heads different? I have not looked for the head numbers, but can I take the non adjustable rockers and put on the other heads?
I guess I am just not used too or comfortable with the adjustment on these. I am hearing valve clatter and it seems easier to just have the non adjustable type.
Thanks
Jim
I have a 352 that has the adjustable rockers and my old engine did not. My question is are the actual heads different? I have not looked for the head numbers, but can I take the non adjustable rockers and put on the other heads?
I guess I am just not used too or comfortable with the adjustment on these. I am hearing valve clatter and it seems easier to just have the non adjustable type.
Thanks
Jim
Posting Guru
Joined: Aug 2005
Posts: 1,036
Likes: 1
From: NE Ga
If you're going from one FE to another, to my knowledge it would work just fine. If you are building the motor, you can rid it of valve clatter by going with a hydraulic lifter cam if your block is set up for it.
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Non-adjustables vs adjustables. Non-adjustables can be run with a hydraulic cam only. You don't have to adjust them, ever. Rocker ratio is 1.73 to 1. Adjustables you can run with a mechanical cam or a hydraulic cam. You have to adjust with a mechanical cam regularly, with a hydraulic cam usually only once. Rocker ratio 1.76 to 1, which means more valve lift with the same cam over the non-adjustables. Both types will physically fit on all FE heads exceot the SOHC 427 and the Tunnel port 427 heads which I doubt you have either one of.
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Originally Posted by Ford428CJ
Dont forget the Hi-Riser heads too!!! LOL
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Elder User
Joined: Mar 2004
Posts: 747
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From: Klamath Falls OR
Originally Posted by Bear 45/70
I forgot about the Hi-risers. It's really sort of irrelivant as every one of those 3 types of heads bolted to a 352 would be banging valves against the block deck anyway.
LOL
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Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
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From: CT
Cammer heads were the only one's that the rockers are different. Stock adj rockers were used on the Tunnelport, Medium Riser and High Riser. TP and MR use a wider rocker stand than for valve spacing than the LR. HR used a shorter rocker stand but same width as the TP/MR C5 stands.
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