Re: Isky/Crane Iron Adjustable Rockers Questions
[Re: SSAAHemiFan]
#1594711
03/18/14 04:12 AM
03/18/14 04:12 AM
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Joined: Aug 2003
Posts: 43,251 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,251
Bend,OR USA
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Stock Mopar shafts for non adjustable rockers and adjustable ductile iron rockers do not get along well The early Isky ductile iron rockers have two distinct differences in them and all the rest of the ductile iron rockers out there, the later Iskys don't have those features. The early ones have a harden tip welded onto the valve stem end and Isky cast into, not onto,the rocker arm between the shaft and the valve stem tip There a lot beefer looking also than the later ones that look like the Ersons and Cranes. All dusctile iron rocker arms need rocker shafts that have the provisions for oiling the pushrods and valve stem tips, AKA Banana groove shafts, that are harden for those ductile iron rocker arms
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Isky/Crane Iron Adjustable Rockers Questions
[Re: SSAAHemiFan]
#1594712
03/18/14 04:19 AM
03/18/14 04:19 AM
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Joined: Nov 2007
Posts: 277 MN
Willie68coronet
enthusiast
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enthusiast
Joined: Nov 2007
Posts: 277
MN
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When I researched these many people that used them didn't seem to think one was better than the other. But Isky Vs. Crane. Many just favor the way the Isky looks "beefier" or has a hardened tip. I have been told by builders you need to run hardened shafts or else they will gall to the rockers. Some people with mild hydraulic cams have gotten away with stock shafts but it's not recommended. Here is a thread with with pictures of the original Isky rockers: https://board.moparts.org/ubbthreads/show...amp;Search=trueThe newer isky's are just relabeled cranes. Like these: http://autoplicity.com/products/1285055-...CFaw-Mgodml4AqQNothing wrong with either. Many people say they are all bullet proof and very reliable in the right application.
'68 Coronet 500 w/ Indy EZ-1 headed 446, 727 trans, 9" rear First day at the track with SUV street tires and no traction: 1.688 60', 7.24 @ 101.79 in the 1/8 mile
Great customer service from: DominicThumper Carbs, B3 racing engines, Porter Racing Engines, A-1 torque converter's, Quick Performance, Racer Brown Cams, R&R Performance, Manton pushrods
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Re: Isky/Crane Iron Adjustable Rockers Questions
[Re: SSAAHemiFan]
#1594715
03/18/14 03:47 PM
03/18/14 03:47 PM
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Joined: Jan 2007
Posts: 1,668 Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Dvorak Machine's rocker bushing kit is the best way to run those rockers.I beleive it works with all the ductile iron rockers incl max wedge stuff.Bulletproof when done correctly.
Leave the gun.......take the Cannoli's....Mike
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Re: Isky/Crane Iron Adjustable Rockers Questions
[Re: SSAAHemiFan]
#1833004
05/23/15 10:39 PM
05/23/15 10:39 PM
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Joined: Dec 2004
Posts: 10,555 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,555
Rittman Ohio
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There are formulas for checking rocker ratio and you may find them on the Wallace Racing website. As far as the shafts go I would go with some hard chrome shafts from Mancini Racing. The banana grooves are a good idea but with chrome shafts and unrestricted oil to the heads you should be good to go. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: Isky/Crane Iron Adjustable Rockers Questions
[Re: SSAAHemiFan]
#1833016
05/23/15 11:33 PM
05/23/15 11:33 PM
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Joined: Dec 2013
Posts: 4,693 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,693
Wichita
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I bought a set of Crane's that were brand new in the box but well over 10 years old for $100 two weekends ago at a swap meet. Had springs, adjusters and lock nuts still in the plastic.
Last edited by GY3; 05/23/15 11:34 PM.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Isky/Crane Iron Adjustable Rockers Questions
[Re: SSAAHemiFan]
#1943026
11/01/15 03:06 PM
11/01/15 03:06 PM
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Joined: Dec 2004
Posts: 10,555 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,555
Rittman Ohio
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If you are going with the shafts you have you may want to groove them. Just make sure you go over the groove with scotchbrite or 600 grit emery cloth to make sure there are no rough edges. I had the good Isky rockers so I had them bushed and blueprinted by RAS. They have very nice shafts too but they are about $100 each. I think the spacers and good holdowns are a good idea.I got my studs and holdowns from Mancini and the spacers from Harlan Sharp. I think you should be OK as long as you stay away from huge spring pressures Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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