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scorpion roller rockers


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Hello folks, does anyone know if pedastal mount scorpion roller rockers will fit under stock cleveland 2v valve covers without to many modifications to the baffles?

 

Thank you

 

p.s. I saw a set of the old stock fms pedastal mount roller rockers that are still available for the cleveland, thoughts on those?

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            

 

 

 

 

 

 

 

 

 

 

 

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I have them on my '69 with a 351c. My valve covers are the aluminum boss 302 style. I had to modify the baffle around the fill cap and the PVC valve, otherwise they were ok. Not sure about the stock stamped covers though.

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1931 Ford Model A Station Wagon
1969 Mach 1 - 351C, TKO-600, 4WDB, R&P, A/C, Shaker, Fold Down, etc.
1972 Mach 1 - 351C, FMX, PDB, PS, A/C, Fold Down, Console
1996 Mustang Cobra Convertible - 10psi Procharger, 436rwhp

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Thanks rust, I'm thinking taller valve covers may be a requirement but I'm trying to sneak off the stock look:)

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            

 

 

 

 

 

 

 

 

 

 

 

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Thanks, I think I will just for it and see what happens.

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            

 

 

 

 

 

 

 

 

 

 

 

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Hi Guys,

I have also used them on my 71 Cleveland 2V für the initial engine build after restoration. I removed them after a few days due to a geometry problem.

 

They are advertised to have the stock ratio of 1:1.73, but in fact the contact point of the pushrod is closer to the pivot than with the stamped steel originals - which are also specified 1:1.73.

There is no problem with valve lift, but on 4 of eight cylinders the pushrods scrape in the cylinder head openings. These need to be modified when you intend to use the Scorpions.

 

Secondly, the contact point on the valve stem is not ideal (too far to the engine center). So there is also work to be done.

 

Image 1:

Here you can see how critical clearance is.

DSC02675.thumb.JPG.be3b7f3a2da9af9e22d3cfc56196a3c8.JPG

 

Image 2:

Here is the normal configuration with the stock rockers.

DSC02677.thumb.JPG.eae8171cd586a61d25abc241aff17189.JPG

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Hi Guys,

I have also used them on my 71 Cleveland 2V für the initial engine build after restoration. I removed them after a few days due to a geometry problem.

 

They are advertised to have the stock ratio of 1:1.73, but in fact the contact point of the pushrod is closer to the pivot than with the stamped steel originals - which are also specified 1:1.73.

There is no problem with valve lift, but on 4 of eight cylinders the pushrods scrape in the cylinder head openings. These need to be modified when you intend to use the Scorpions.

 

Secondly, the contact point on the valve stem is not ideal (too far to the engine center). So there is also work to be done.

 

Image 1:

Here you can see how critical clearance is.

 

 

Image 2:

Here is the normal configuration with the stock rockers.

 

 

Can someone tell me if pushrod guides are necessary with roller rockers? I thought that roller rockers are not self aligning so the are required along with hardened push rods.

 

Spechti, did you mill the heads and changed cam shaft lift? Are you using stock length push rods?

 

Sorry for diverging here just trying to learn some basics here whenever I see something that I need to learn about. Since this was mentioned I'd thought I'd ask.

thx

-john

(jbojo)

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

 

Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]

 

 

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Well now I might stick with what I have just like ford made it

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            

 

 

 

 

 

 

 

 

 

 

 

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Hmmm, I will have to pull a cover and check that interference. I didn't notice it last time I was in there or during assembly, but you can't be too careful.

spacer.png
1931 Ford Model A Station Wagon
1969 Mach 1 - 351C, TKO-600, 4WDB, R&P, A/C, Shaker, Fold Down, etc.
1972 Mach 1 - 351C, FMX, PDB, PS, A/C, Fold Down, Console
1996 Mustang Cobra Convertible - 10psi Procharger, 436rwhp

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Spechti, did you mill the heads and changed cam shaft lift? Are you using stock length push rods?

Yes, the camshaft is a Crane Cams hydraulic roller cam with .56 lift. I use Crane vertical bar hydraulic roller retrofit lifters. This combo needs custom pushrods in a length from approx. 7.80 to 7.85 inch. In my case, the 7.80 were the recommendation from Crane, but they were noisy and had too much slack. So I used the Crane rods in 7.85 inch length and the valvetrain is quiet now.

 

The Scorpion rocker arms do not need guides, because they move only on one axis. They are also not adjustable. Adjustments only can be made by shims under the pedestal, head modification, valve tip modification or pushrod length.

 

The Scorpion rocker arms also fit under the stock Cleveland valve covers. This means you can set up a highly advanced valvetrain in an externally totally stock appearing engine.

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Spechti, did you mill the heads and changed cam shaft lift? Are you using stock length push rods?

Yes, the camshaft is a Crane Cams hydraulic roller cam with .56 lift. I use Crane vertical bar hydraulic roller retrofit lifters. This combo needs custom pushrods in a length from approx. 7.80 to 7.85 inch. In my case, the 7.80 were the recommendation from Crane, but they were noisy and had too much slack. So I used the Crane rods in 7.85 inch length and the valvetrain is quiet now.

 

The Scorpion rocker arms do not need guides, because they move only on one axis. They are also not adjustable. Adjustments only can be made by shims under the pedestal, head modification, valve tip modification or pushrod length.

 

The Scorpion rocker arms also fit under the stock Cleveland valve covers. This means you can set up a highly advanced valvetrain in an externally totally stock appearing engine.

 

Thx for the update Spechti.

I used Harland Sharp roller rockers and have guide plates to help with the geometry. I also had to go with shorter push rods because of the higher lift cam and the heads milled. Was just wondering why I didn't see guide plate on your install. Didn't realize that some applications didn't need them.

thx

-john

(jbojo)

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

 

Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]

 

 

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Thanks for all the info folks, I am still on the fence on this one because my engine is running so good right now. I have an appointment with the alignment shop tuesday then I'll be ready to put some miles on this thing finally.

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            

 

 

 

 

 

 

 

 

 

 

 

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