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Unread 11-16-2012   #1 (permalink)
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Default Rail type roller rockers on E7 heads?

So i was able to get some rail type roller rockers for free. along with the conversion studs, to convert my pedistal mount rocker to stud mount. I was wondering if anyone has used comp cam #1431 1.6 rail tip rockers on a stock 5.0 mustang with E7 heads. I plan on getting a set of gt 40s later but i already have upper intake off and valve covers so i figured why not??? I just figured i will need new pushrods and was wondering if anyone has done this setup and had the correct pushrod length. if not iam just going to buy an adjustable pushrod and measure myself to get the correct geometry.


[img=http://s6.postimage.org/l7m2pjiod/IMAG0607.jpg]

[img=http://s6.postimage.org/hryjtqatp/IMAG0605.jpg]
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Unread 11-16-2012   #2 (permalink)
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First, those are not rail-type rockers. They are just steel rockers arms with a roller tip. Did you get guide places with the rocker arms (they will be required with stud mount rockers)? What studs did you get, or even better, do you have a part number? What you got is one of these, I believe:

COMP Cams Magnum Steel Roller Tip Rocker Arms 1431-16

or, the complete kit:

COMP Cams Magnum Rocker Arm Kits 1431-KIT

Correct?
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Unread 11-16-2012   #3 (permalink)
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they are a rail type roller rocker that are stud mounted. The stock e7 head uses pedistal mount rockers that require guide plates.I have the arp pedistal to stud conversion studs.and the comp 1431 1.6 rail tip roller rocker. This set of rockers has a rail tip to prevent the rocker tip from moving off the tip of the valve.

click on the first link you sent and click multipile images and it shows the rail type roller tip.

I read in some old forum posts that guys have used this set up on a stock 5.0 and it worked.iam just concerned about pushrod length or is stock fine?

the guy i got them from ran them on a set of 86 stang heads with no issues at all.
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Unread 11-16-2012   #4 (permalink)
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When I think of "rail-type" rockers I think of shaft mount rockers. No where in those links I supplied does it say "rail-type," and they are the part number you said you have. They specify them as being roller tip, like I said.

I don't know about your E7 heads, but mine sure didn't have guide plates, and they definitely didn't have hardened pushrods - both of which are required with stud mount rocker arms. Stud mount rockers do not require guide plates.

I was under the impression that converting to stud mount rockers required machining, but I have never done this, so I can't speak from experience.
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Unread 11-16-2012   #5 (permalink)
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From comps website
COMP Cams: Magnum Roller Rocker Arm: Ford; 3/8" Stud, 1.6 Ratio=


they make a conversion kit to screw into head to convert to stud.

1979-95 Mustang 5.0L Crane Pedestal Mount To Stud Mount Rocker Arm Conversion Kit at LRS - Free Shipping!

i wouldnt need the guideplates because of the rail type roller tip

check out this thread

Rail or Non-Rail type rockers - Ford Muscle Forums : Ford Muscle Cars Tech Forum

i just wanna know what pushrods to use
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Unread 11-17-2012   #6 (permalink)
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You better do your homework. Mock it up first, I'm betting you will need new valves. I don't think stock e7 valves have a long enough tip to use rail rockers. So you have a chance of the rocker ears digging into the retainer. Most valve trains that use those rockers have large tips above the retainer.

In my opinion, if you need new valves, its not worth the extra expense just to use those rockers.
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Unread 11-17-2012   #7 (permalink)
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those ARE rail type rocker arms. most likely will NOT work with E7 heads/valves. just get some good pedistal r/r and measure for pushrod length......
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Unread 11-19-2012   #8 (permalink)
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Ya i decided not to use them. Iam just going to sell them with the heads that they came on. To me its not worth the extra time and work for my stock heads. Later i plan on getting some gt 40s then i will look into rocker arms that fit correct. To me the rail type is old school and they have better rockers out that fit my needs better. I was just trying to see if it would be benefical to me... and i came to the conclusion that they are not.

Thanks for the input
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