rocker arm ratio?
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rocker arm ratio?
I have a mounainear crate motor in my mustang, not sure of the year but it did come with cast iron gt-40 heads. Anyway The heads are now aluminum afr. I am in the process of changing out the cam and really need to know what ration the rocker arms are. I have a feeling they are 1.5 because each one is stamped with a "5". Thanks in advance for the help.
Rob
Rob
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rocker arm ratio?
I beleive that you are correct. The stock rocker ratio for the gt40p heads is in a Mountaineer engine is 1.5. Most people put a 1.6 roller rockers on them. Some have even put 1.7 ratio rockers on.
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rocker arm ratio?
Originally posted by swirk
I beleive that you are correct. The stock rocker ratio for the gt40p heads is in a Mountaineer engine is 1.5. Most people put a 1.6 roller rockers on them. Some have even put 1.7 ratio rockers on.
I beleive that you are correct. The stock rocker ratio for the gt40p heads is in a Mountaineer engine is 1.5. Most people put a 1.6 roller rockers on them. Some have even put 1.7 ratio rockers on.
they were not the "p" heads. Any idea on the regular gt-40 heads?
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rocker arm ratio?
The rockers you have are 1.6. The stamping 5 is a ford thing and doesnt indicate the ratio. I would still swap to a 1.6 roller rocker though. Choose the lift you want with the cam and not the rocker, you will acheive better rocker arm geometry with the 1.6 over the 1.7.
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rocker arm ratio?
I'm sure they werent "p" heads, they are long since gone but my fms shorty headers bolted right up and from what I understand "p" heads require a special header.
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rocker arm ratio?
You don't HAVE to use special headers for "p" heads. There are a couple that fit without modification. Some headers will fit if you put a small ding in a couple of the tubes, run the shorter (stock for a mountaineer/explorer) spark plugs and 90* boot spark plug wires.
My search goes on for a set of used gt40p heads.......
My search goes on for a set of used gt40p heads.......
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