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Author
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Topic: pro-form roller rockers
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capri man
Gearhead Posts: 6417
From: doerun, ga.
Registered: Nov 2000
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posted 05-28-2002 03:12 PM
   
has anyone had any experience with pro-form roller rockers (same people that have the carb bodies). a roundy roundy friend of mine has had one break for the last 3 weeks. they are breaking right in the middle where the fulcrum point is. there is no signs of coil bind either.
thanks have you ever noticed that it is always a friend with the problem?? hee hee ------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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jkilroy
Gearhead Posts: 1808
From: Vicksburg, MS
Registered: Dec 99
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posted 05-28-2002 03:56 PM
I have never used the pro-forms however I have heard more than one person say they are to be avoided. Crane gold race rockers are to be avoided also. Personally, in aluminum I like good old Harland Sharps, they are a great value. A personal friend of mine has been running the same set on a *hot* Pontiac 400 for nearly 20 years with nary a problem. The CompCams HiTech 15-5 Stainless rockers are very very nice, along with the Crowers, both of those are as good as you can get without investing in a shaft system. ------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"
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kid vishus
Gearhead Posts: 6098
From: middle of NC
Registered: Oct 2000
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posted 05-28-2002 04:11 PM
I am a firm believer that valvetrain parts is the wrong area to try and save money.
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Mpcoluv
Gearhead Posts: 1278
From: Charlotte NC usa
Registered: Apr 2001
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posted 05-28-2002 04:21 PM
quote:
Originally posted by kid vishus:
I am a firm believer that valvetrain parts is the wrong area to try and save money.
Spoken like a true Cleveland owner :0
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capri man
Gearhead Posts: 6417
From: doerun, ga.
Registered: Nov 2000
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posted 05-28-2002 04:31 PM
i am on the 4th year now with my ford motorsports ones with no probs. so far.------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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Daniel Jones
Gearhead Posts: 813
From: St. Louis, MO
Registered: Aug 99
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posted 05-29-2002 01:01 PM
> Crane gold race rockers are to be avoided also. Are you sure you don't mean the low cost Crane line? The Crane gold race
are their premium line, with several versions available. A number of
other rockers look suspiciously like Crane's gold race (the Lunati rockers
look identical, for instance). >Personally, in aluminum I like good old Harland Sharps, they are a great
>value. The latest Harland Sharps look a lot more like the Crane gold race than
the old flat top Harland Sharps. >The CompCams HiTech 15-5 Stainless rockers are very very nice, along with
>the Crowers, both of those are as good as you can get without investing
>in a shaft system. Yes. Dan Jones
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Butch Jennings
Gearhead Posts: 624
From: No. California
Registered: Apr 2000
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posted 05-29-2002 02:08 PM
I've used Crane's gold rockers for years and never had a problem with them. I've seen more than one set of Harland Sharps go away on FE motors. ------------------
Butch
460 powered 1967 Comet Cyclone
10.271 @ 130.231
Butcher's Home Page
"Friends don't let friends drive Chevys"
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jkilroy
Gearhead Posts: 1808
From: Vicksburg, MS
Registered: Dec 99
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posted 05-29-2002 02:13 PM
I have, as well as several friends, had more than one set of Crane "Gold Race Rocker" fail in spectacular fashion. I prefer steel Comp's or Crowers to any aluminum rocker.------------------
Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"
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Larry Jennings
Gearhead Posts: 540
From: Redwood City, Ca. USA
Registered: Apr 2000
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posted 05-29-2002 05:10 PM
That is odd Jay! I guess you set your stuff up different from mine. I have 3 sets of junk (new type) Sharps in my shop now and in the hood of 14 sets of Crane Golds running for years now on Ford, Mopar and Chevy motors in trucks, boats and cars. One set of these (junk?) Crane's is at 90,000 miles and counting on a 454 Chevy crew cab dually that tows a drag boat and has been treated poorly at best. Since the big block Chevy is the worst for valve train failure I figure that one speaks well of the product  . On one of the race boats with a 780 and then some lift cam that turns 9000+ we had a set of stainless Comp's and we were killing valve springs every time out and my old crafty sprint car buddy talked me into trying aluminum rockers to dampen some of the valve train vibration transference and we have had much fewer failures as a result of that change so I'd say "this" just like so many other performance related opinions are a user friendly or unfriendly deal! I think of aluminum as a metal for race parts and stainless as a food preparation metal unless it's decorator bolts  . ------------------
Whenever I feel blue I start breathing again!
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kid vishus
Gearhead Posts: 6098
From: middle of NC
Registered: Oct 2000
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posted 05-29-2002 05:22 PM
I like Crower stainless rockers. When I bought my car, it had Lunati aluminum roller rockers on the motor. It ran pretty good. I got a wild idea on week and decided to pull those and the 5/16" pushrods off and put my Crower rockers and 3/8" .065 wall pushrods on it. It picked up .05 in the 1/8. I feel thats quite a gain for a rocker arm and pushrod swap, but it did it. I feel the stainless rockers are far superior to aluminum rockers. But, that's just my opinion. 
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Butch Jennings
Gearhead Posts: 624
From: No. California
Registered: Apr 2000
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posted 05-29-2002 05:23 PM
quote:
Originally posted by Larry Jennings:
I think of aluminum as a metal for race parts and stainless as a food preparation metal unless it's decorator bolts .
LOL....is that like "Gas is for washin parts and Alcohol is for drinkin"?
------------------
Butch
460 powered 1967 Comet Cyclone
10.271 @ 130.231
Butcher's Home Page
"Friends don't let friends drive Chevys"
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Larry Jennings
Gearhead Posts: 540
From: Redwood City, Ca. USA
Registered: Apr 2000
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posted 05-29-2002 05:53 PM
Kid! There is a guy that has a system that encapsulates the pushrod in a rocker adjustment stud and puts a mini rev kit on the pushrods. I think his name is Duciur or close to that. He claims some pretty heady horsepower gains with the system and I believe it will free up some power but not an efficient dollar per horse exchange since his system is kinda pricey so I'm yet to try it. Anyway his theory is when the slack in the loose pushrod is snapped into the ball cup center on lift a shock wave is sent through the whole single valve train and some power is used to overcome the anomaly. You might have touched on the same gain by using a bigger pushrod. JMO .------------------
Whenever I feel blue I start breathing again!
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bluestreek
Gearhead Posts: 1724
From: Athens,GA
Registered: Jul 2001
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posted 05-29-2002 10:54 PM
I rebuilt a Honda 650, 2 cylinder, motorcycle engine once and it had pushrods in it that were as big as a cigar and huge steel roller rockers. I was amazed at the size and weight of everything in the valve train, but this 4 stroke engine could turn 12,000 rpms all day long!!! It had 60,000 miles on it when it spun a bearing. Don't waste your money on cheap parts, unless you just like to gamble on something not breaking.BS
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jsracingbbf
Gearhead Posts: 2751
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 05-31-2002 01:03 AM
I ran the big Lunati 3/8th Pushrods in my clevland with OLD Harland Sharp aluminum rockers for 8 years. I had over 780 passes on one motor. I run the same Roller rockers on my BBF with Comp Cams 1 piece 3/8th pushrods now. I've never had a rockerarm fail. I've chewed up a couple of pushrods but not one harland sharp has give me trouble.
Jerry
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Larry Jennings
Gearhead Posts: 540
From: Redwood City, Ca. USA
Registered: Apr 2000
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posted 05-31-2002 02:02 AM
Butcher had an old set of Sharp's on his FE and they never showed a sign of wear, they are probably out there somewhere still goin strong. I liked them so much I used Sharps on the next three FE's and those are the three sets in my shop now  . They look like the shaft hole was drilled on an angle and all the tips have slop (bout a 1/16") on one side only after around 3000 miles. Now I'm tryin to figure out what can be made from 48 old sloppy roller rockers that'd be fun or cool . ------------------
Whenever I feel blue I start breathing again!
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