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Who has installed Scorpion Rockers
#1
Edited post to be more clear...

I intended my machine shop, to mill the pedestals and put in 7/16 studs so I could install a set of Harland Sharp 1.73 roller rockers.

Since this was not done, rather than go back, I am contemplating keeping the heads virgin and using the SCORPION SCP1024BL roller rockers.

My engine is relatively mild with 270# spring pressure at full .525 lift, so I don't think this is going to be an issue with the 5/16 bolt.

Thanks.

[Image: 11jmcuc.png]
351C Bold Manners, Brash Attitude
Favorite Teams: Michigan Wolverines and Whoever Is Playing Ohio State.

When I drive past a herd of cows, the cows MOO at me
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#2
Rocker studs? Head studs? My understanding is you'd be way better off with ARP for not a whole lot more money.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
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#3
I had my heads machined for the bigger screw in studs and went with harland sharp roller rockers. but if you dont want to take heads back to machine shope you can get the conversion kit and still run studs.
Crane Cams 52655-16 - Crane Rocker Arm Guideplate Conversion Kits
http://www.summitracing.com/parts/CRN-52.../?rtype=10
they are not intended for race motors but can handle decent HP on the street.
Kevin

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 28ivsix.png]




                                                                                             
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#4
I used the Scorpion bolt down pedestal rockers on a a 351C-4V 71 Torino GT several years ago. The cam and springs were similar. They worked fine and fit under the stock steel valve covers with a little work on the fill hole baffles. I would suggest some better pushrods. The stock aftermarket replacements lasted two weeks and one edge of the envelop run. Chuck
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#5
c9zx;63415 Wrote:I used the Scorpion bolt down pedestal rockers on a a 351C-4V 71 Torino GT several years ago. The cam and springs were similar. They worked fine and fit under the stock steel valve covers with a little work on the fill hole baffles. I would suggest some better pushrods. The stock aftermarket replacements lasted two weeks and one edge of the envelop run. Chuck

How difficult was it too adjust the rockers? Did you get/measure for different size pushrods or did you keep the original height?

Thanks.


[Image: 11jmcuc.png]
351C Bold Manners, Brash Attitude
Favorite Teams: Michigan Wolverines and Whoever Is Playing Ohio State.

When I drive past a herd of cows, the cows MOO at me
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#6
I used checking springs, adjustable checking pushrod, and shims to get best reasonable pattern on the stem tip and proper lifter preload. We had the pushrods custom made to length. It was the only time I've used the bolt down system on a 351C. It worked and I never had another problem. However, It was a bit of a PITA and I always worried about the 5/16 bolts. I've never used that system again and I don't believe I'd use anyone's bolt down rockers again on a 351C that was intended for performance. Just one guys opinion. Chuck
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#7
I have them, although I don't have a ton of miles on them yet. I installed them with shims using a dial indicator to set pre-load.

[Image: 4zw1hv.png]
Dave

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
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#8
Kevin's the man - I also went with a set of Crane Cams screw-in 7/16" studs (52655-16 - same P/N) and some CompCams Hi-Energy cast aluminum 1.73 roller rockers (17045-16). Both are Summit Racing P/Ns.

The studs were kind of a PITA to install (kept backing out as I was loosening the jam nut to move on to the next one), but I figured it out after a short time. Nice to hear it from someone else that they're a solid product.

Eric

[Image: mach1sig2.gif]
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