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400 roller rockers

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Old 02-07-2004, 09:39 PM
tastyklair tastyklair is offline
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400 roller rockers

I saw on one of Bubbas posts a picture and part number of his gy head with roller tip rockers and the part # he gave was for a 1.72 big block chev. with a 7/16 stud. Will this work without any modification to the heads. How about any other of the true roller rockers? Can you use any without modifications or plates?
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Old 02-07-2004, 10:25 PM
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No you can't use them without modifications you will have to have the head milled, and drilled for screw in studs, and guide plates to use 7/16 rocker studs. crane does make a roller rocker that can be used without modification, and I believe another co called yella terra or something like that makes them also. personally I just machine the heads for screw in studs, and run full rollers but if for money reasons or because you don't want to remove the heads try the crane version
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Old 02-07-2004, 10:28 PM
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The FMS pedestal mount rockers are 1.73 ratio, and bolt on w/ no mods, and no guideplates. They are full roller, with a roller tip and roller trunion.
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Old 02-07-2004, 11:38 PM
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That right I forgot about the fms rockers I even have a set on a 302 (1.6 ratio) only thing is can't remember if the fms catalog list them for the 400 think they are listed for 429/460 but they will work, just check other manufactors, and they group the 351c 351m/400, and 429/460 together
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Old 02-07-2004, 11:42 PM
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They list them for 351M/400/429/460.
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Old 02-08-2004, 12:39 AM
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Scorpion also makes a pedestal mount set as well as a stud mount set. You can read all about the stud conversion in the FMS catalog.
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Old 02-08-2004, 07:36 AM
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Help me out guys, who is FMS?
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Old 02-08-2004, 08:14 AM
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Old 02-08-2004, 09:21 AM
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does Ford Motor Sports have a website, or how can I get ahold of a catalog?
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Old 02-08-2004, 09:35 AM
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roller rockers

Thanks for the info. Where can I find an FMS catalogue or order the parts?
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Old 02-08-2004, 02:59 PM
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You used to be able to access from www.fordracing.com , but I havn't checked in a while.
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Old 02-08-2004, 04:56 PM
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What would be the advantage to Roller rockers?
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Old 02-08-2004, 06:57 PM
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Crane also makes a conversion kit which requires no machining and allows you to run any style adjustable rocker you want.

The only real advantage to roller rockers is reduced friction in the valvetrain, might be worth a couple of ponies. Also some aftermarket makers claim that their rockers are machined to closer tolerances than factory rockers and therefore provide extra performance because they lift the valves higher.
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Old 02-08-2004, 07:12 PM
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Your Ford dealer parts dept should have the FMS catalog. There are a few other stores that cary the FMS line also.

The most consistent savings figures I have seen are about 20HP or 20 lb-ft of torque also. If you have ever built an engine you will see what type of torque it takes to turn the drivetrain when you tighten down the valvetrain the first time. It ads a considerable load to the engine.
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Old 02-08-2004, 07:27 PM
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Well I have put together valve trains a few times, but honestly roller rockers are an expensive way to get a few ponies.
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