Comp Rockers or Crane Rockers
#186465
01/07/09 09:08 AM
01/07/09 09:08 AM
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Joined: Jan 2003
Posts: 4,281 Danville, NH
Mopar_Mike
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I would like to upgrade my stock rockers from my 440 to an adjustable roller rocker. I have a smaller .480 lift cam, so I am going to use a 1.6 ratio. I have heard Crane rockers are the best for the buck vs. cheap ones that will just break or expensive ones that I do not need. How about Comp rockers though? Do they have the same quality as Crane? or.. Thanks.
RS23L7 4-Speed
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Re: Comp Rockers or Crane Rockers
[Re: Mopar_Mike]
#186466
01/07/09 09:17 AM
01/07/09 09:17 AM
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Anonymous
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Anonymous
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The crane units are fine on small cams up to .620..I have not used the comps...I would buy Harland Sharp rockers if it was mee.. They will work on bigger cams if you ever decide to upgrade.. poppaj
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Re: Comp Rockers or Crane Rockers
#186467
01/07/09 11:55 AM
01/07/09 11:55 AM
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Anonymous
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Quote:
The crane units are fine on small cams up to .620..I have not used the comps...I would buy Harland Sharp rockers if it was mee.. They will work on bigger cams if you ever decide to upgrade.. poppaj
i have to agree. in most cases the Harland Sharp rockers arent that much more money and you'll have somthing that will handle just about anything you can throw at them. if you need pricing, please contact me.
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Re: Comp Rockers or Crane Rockers
[Re: notchbackcuda]
#186472
01/07/09 01:07 PM
01/07/09 01:07 PM
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Anonymous
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Quote:
Quote: The crane units are fine on small cams up to .620..I have not used the comps...I would buy Harland Sharp rockers if it was mee.. They will work on bigger cams if you ever decide to upgrade.. poppaj
OK, I'm curious why the Crane's are limited to .620 lift?
because as the lift increases, so does the need for a heavier spring. the cranes will only handle just so much pressure.
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Re: Comp Rockers or Crane Rockers
[Re: ZIPPY]
#186474
01/07/09 01:17 PM
01/07/09 01:17 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Are there any ductile rockers in the 1.6 ratio(I didnt think there was but I dont know BB stuff). Because he wanted 1.6 ratio
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Re: Comp Rockers or Crane Rockers
[Re: ZIPPY]
#186476
01/07/09 04:14 PM
01/07/09 04:14 PM
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Joined: Jan 2003
Posts: 4,281 Danville, NH
Mopar_Mike
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I have seen the Crane, and in fact have some 1.5 Golds, but not on the engine. I thought my .480 lift cam would benefit with a 1.6 giving a .512 lift. I also saw some Comp rockers (similar to the Crane, not the iron ductile style) on ebay that are 1.6 and about $100 cheaper than a new set of 1.6 Crane, but was worried about durability. I have edelbrock RPM 84cc heads and valves etc. but already know the 1.6 will work with my geometry.
Last edited by Mopar_Mike; 01/07/09 04:16 PM.
RS23L7 4-Speed
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Re: Comp Rockers or Crane Rockers
[Re: ccdave]
#186478
01/07/09 05:33 PM
01/07/09 05:33 PM
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Anonymous
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The Cranes will only handle so much spring pressure and lift. They are clearanced fit to shaft..No needle bearings at shaft..Aluminium fatigue easy when riding bare against steel shafts with high spring pressure...Where Harland Sharps have needle bearings to ride on at the shaft..Also the crane units will have a clearance problem on larger diameter springs, they will hit the outside edge of the retainer on the bottom side... poppaj
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Re: Comp Rockers or Crane Rockers
#186479
01/07/09 07:36 PM
01/07/09 07:36 PM
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Joined: May 2007
Posts: 64 Airville Pa.
boomer
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Quote:
No needle bearings at shaft..Aluminium fatigue easy when riding bare against steel shafts with high spring pressure... poppaj
I am pretty sure the crane roller rockers are bushed........
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Re: Comp Rockers or Crane Rockers
[Re: ZIPPY]
#186480
01/07/09 08:03 PM
01/07/09 08:03 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
Yes there are Mike, Crane 64771-16. They would probably work perfect but I have never used them...
I have, and in a similar application (a small hydraulic street cam). They worked fine.
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Re: Comp Rockers or Crane Rockers
[Re: Mopar_Mike]
#186481
01/07/09 08:04 PM
01/07/09 08:04 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
... I also saw some Comp rockers (similar to the Crane, not the iron ductile style) on ebay that are 1.6 and about $100 cheaper than a new set of 1.6 Crane, but was worried about durability.
If they're what I think you're talking about... !
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Re: Comp Rockers or Crane Rockers
[Re: boomer]
#186482
01/07/09 08:11 PM
01/07/09 08:11 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
Quote:
No needle bearings at shaft...
I am pretty sure the crane roller rockers are bushed........
I don't see any bushings...
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Re: Comp Rockers or Crane Rockers
[Re: BradH]
#186483
01/07/09 08:19 PM
01/07/09 08:19 PM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
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organ
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the cranes are definitely not bushed. mine have been very reliable.
for what is the good life if not doing things thoughtfully?
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Re: Comp Rockers or Crane Rockers
[Re: 67dodgeracer]
#186489
01/08/09 02:21 AM
01/08/09 02:21 AM
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Anonymous
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Anonymous
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Anyone tried the PRW rockers ?
Just wondering I have used and sold some of the ferd and chevy rockers and none have come back
JW
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Re: Comp Rockers or Crane Rockers
[Re: 67dodgeracer]
#186491
01/09/09 07:54 PM
01/09/09 07:54 PM
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Joined: Jan 2003
Posts: 338 Montreal Quebec
STROKIE
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Posts: 338
Montreal Quebec
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Crane Cams introduce its first aluminun rocker arm to the performance industry in 1964... Since that time they produced more than one and a half million Crane aluminun rocker arm. This statement was in 1986. Today can be 2 millions. I think they proved their reliability... I used it since 20 years no problems
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Re: Comp Rockers or Crane Rockers
[Re: Triple Threat]
#186493
01/09/09 08:26 PM
01/09/09 08:26 PM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
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organ
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i used a set a while back. when 440 source first came out wittem. they were my customer's idea, and his engine so i used 'em under slight protest. they've got about two years of service on 'em with a mild flat tappet solid cam, aboot .600 lift, no probs yet. the shafts were filled with polishing compound, and i had to pull the plugs and clean them. what a mess!
for what is the good life if not doing things thoughtfully?
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Re: Comp Rockers or Crane Rockers
[Re: Colin Frolick]
#186495
01/11/09 08:38 PM
01/11/09 08:38 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
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Rock Springs
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Sometimes you can find Indy/Dove SR rockers pretty cheap in the race section...Seems I recall a used set of there...They can usually be had in the $300-$400 range. And work pretty well with about any typical "Big" solid flat tappet cams. There was a set in the classifieds, but cant recall the details, or even if they were SR style... Just a thought.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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