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#1
09-06-2022, 09:08 AM
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SR cam repair
I have an old Ultradyne solid roller that has one lobe worn down from the roller wheel locking up. The cam card is long gone, but I remember .626 lift and 270ish @ .050.
Anyway I would like to get this repaired. It’s my understanding that Bullet can accomplish this. Any opinions on this? Thanks
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
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#2
09-06-2022, 09:16 AM
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Bullet might be able to regrind it to something else. But they do not weld cams. Any pics of the failed lobe?
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#3
09-06-2022, 09:24 AM
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Send pics later.thanks
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
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#4
09-06-2022, 09:29 AM
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I would talk to Tim Goolsby directly at Ultradyne/Bullet. He has 30+ years experience there. Send him detailed pics of the damage and he will tell you some options. We have had many SR cams "repaired" by them over the years and a few that became door stops. Depends of damage, depth of hardness and profile. If they CAN NOT fix it, I may have a lightly damaged Ultradyne SR cam you can use for a regrind. The price will be right. PM me if needed.
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#5
09-06-2022, 10:00 AM
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Back in the early 70s I was running a Crower solid roller in a 65 GTO street car, I dropped a valve head and broke a rod. The errant rod nicked the one cam journal fairly deep. I sent it back to Crower, and they repaired it.
I'm not sure exactly how it was done, but it came back just like new, put it into another engine, and run the hell out of it. I still have the cam, and lifters in my stash. So Crower also had the know how to repair a solid roller cam back then, and I assume they still might have the ability to do repairs such as this. 
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Brad Yost 1973 T/A (SOLD) 2005 GTO 1984 Grand Prix 100% Pontiacs in my driveway!!! What's in your driveway? If you don't take some of the RACETRACK home with you, Ya got cheated    
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#6
09-06-2022, 10:16 AM
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Thanks guys. Ordinary I would never hesitate to just buy new, but we live in a very different world these days, trying to conserve wherever I can. I will probably just contact them, and go from there. Thanks
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
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#7
09-06-2022, 11:52 AM
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The grind number should be etched into the end of the cam.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#8
09-06-2022, 02:19 PM
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there was an outfit in LA that did cam repairs;
They would read the good cam lobes, and build up, to regrind the damaged lobes. Webcams I used them once to repair an unobtainable Quad4 camshaft years ago - after I accidentally way-over-reved the engine and a couple lifters exploded on me. I didn't realize the memcal I had recently installed had a 13,000 (or something like that) rev limit(!).
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#9
09-06-2022, 05:33 PM
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Welding and grinding in CA is probably Schneider Racing cams.
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#10
09-06-2022, 05:38 PM
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i can’t get a good picture to get the lobe to stand out. Anyway I noticed a couple other lobes buggered up, might not be cost effective. But I do have a Comp solid roller in good condition. I will have to see if Bullet will do one of their grinds on a competitors used cams.
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
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#11
09-06-2022, 06:17 PM
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I had Bullet regrind a Comp Cam to one of their specs, very happy. Think it was $200
Rich |
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#12
09-06-2022, 11:12 PM
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A few years ago I sent a UltraDyne solid roller cam that had one lobe damaged to Tim Goolsby to be reground. At the time it was $157.50 plus freight.
As mentioned here, it depends on the damage, depth of hardness and profile. ..
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#13
09-07-2022, 07:52 AM
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#14
09-07-2022, 01:33 PM
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Somewhere. I have seen pictures of Ed Iskadarien repairing or regaining a cam, they might be a,other choice...
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#15
09-07-2022, 02:07 PM
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Pic
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
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#16
09-07-2022, 02:45 PM
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Quote:
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
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#17
09-07-2022, 06:43 PM
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"Repairable" as in welding it up and regrinding, or simply grinding to a milder cam profile? Seems that starting over with a new cam blank would be less cost than labor to weld and regrind.
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Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress. |
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#18
09-07-2022, 06:54 PM
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Only problem is cam blanks are in short supply, and have been for awhile. If he needs it soon, a repair, or downsize to a smaller base circle may be more time efficient. years ago early 70s when I had Crower repair mine, it was probably 1/3 of new, and turnaround was just a few weeks.
Mine was much worse than Bill's is, so I'm certain his isn't going to be a problem to repair.
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Brad Yost 1973 T/A (SOLD) 2005 GTO 1984 Grand Prix 100% Pontiacs in my driveway!!! What's in your driveway? If you don't take some of the RACETRACK home with you, Ya got cheated
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#19
09-07-2022, 09:11 PM
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I’m in no hurry. Just trying to conserve wherever I can. I will send it to the man and see what he says.
Thanks!
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
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#20
09-07-2022, 10:28 PM
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my post may have been missed, but it bears bringing up again.;
For 'Webcams' this is (as i understood it) one of the main things they do.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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