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Old 05-19-2005, 04:01   #1 (permalink)
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Solid Cam Or Roller Solid

what do u thinks guys ......?
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Old 05-19-2005, 04:42   #2 (permalink)
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Re: Solid Cam Or Roller Solid

Quote:
Originally Posted by clevo donk
what do u thinks guys ......?
If I had my time again I would go the roller for sure. More money but like everything else in this world, you only get what you pay for!
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Old 05-19-2005, 05:30   #3 (permalink)
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Re: Solid Cam Or Roller Solid

If you have the $ go a roller. Only downfall to the high spring pressures I've heard the springs go soft quickly.
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Old 05-19-2005, 06:23   #4 (permalink)
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Re: Solid Cam Or Roller Solid

Probably get a year out of springs depending on use, weekend use and street meets and rev's would vary, a pro stock racer up here use's a set per meeting. Just look at some of the flat tappet street falc's doing stout number's and the cost just does'nt add up. depend's on your goals.
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Old 05-19-2005, 06:35   #5 (permalink)
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Re: Solid Cam Or Roller Solid

On a solid cam the springs will last years or more. My old springs show this. they are still the same pressure as when they were bought 4 years or more ago. On a solid roller thats just not the case. My dyno tuner turns his motor with a solid roller over by hand periodically to stop spring sag/failure when not driving it.
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Old 05-19-2005, 14:54   #6 (permalink)
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Smile Re: Solid Cam Or Roller Solid

Depends on the grind. I used a Crane .670" lift x 278 dur. roller cam (can't remember springs, sorry) revving Chev engine to 8400?? for ages without weakening springs.
Changed to a .670" lift another brand roller (later model) with more duration and much different shaped opening and closing ramps and it hammered the springs. We revved it to 9200 though, much harder on springs. We had to reshim springs every meeting and destroyed them in no time. They were good brand springs not rubbish.

It all depends on the size and shape of cam you want to run. Small rollers are available but personally I wouldn't use one on a streeter that was going to be driven a lot.

Cheers Jock

Forgot - also used to back off rockers immediately after racing ceased so as to allow springs to be relieved of pressure.
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Old 05-19-2005, 14:57   #7 (permalink)
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Smile Re: Solid Cam Or Roller Solid

Depends on the grind. I used a Crane .670" lift x 278 dur. roller cam (can't remember springs, sorry) revving Chev engine to 8400?? for ages without weakening springs.
Changed to a .670" lift another brand roller (later model) with more duration and much different shaped opening and closing ramps and it hammered the springs. We revved it to 9200 though, much harder on springs. We had to reshim springs every meeting and destroyed them in no time. They were good brand springs not rubbish.

It all depends on the size and shape of cam you want to run. Small rollers are available but personally I wouldn't use one on a streeter that was going to be driven a lot.

Also used to back off springs after racing finished for night so springs didn't weaken over night.

Cheers Jock
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Old 05-19-2005, 18:32   #8 (permalink)
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Re: Solid Cam Or Roller Solid

Solid Rollers are fine for low mileage stuff but if the lifters aren't replaced at the designated service intervals (from memory about every 2000 k's under heavy load) then the lifter roller bearing can fail and destroy the cam.
This isnt such an issue for drag stuff but curcuit or boat racing can clock up the K's real quick.
My engine builder spends allot time replacing stuffed cams in customer engines because people try to get a "few extra miles" before lifter replacement..
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Old 05-19-2005, 20:27   #9 (permalink)
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Re: Solid Cam Or Roller Solid

Quote:
Originally Posted by jock
Depends on the grind. I used a Crane .670" lift x 278 dur. roller cam (can't remember springs, sorry) revving Chev engine to 8400?? for ages without weakening springs.
Changed to a .670" lift another brand roller (later model) with more duration and much different shaped opening and closing ramps and it hammered the springs. We revved it to 9200 though, much harder on springs. We had to reshim springs every meeting and destroyed them in no time. They were good brand springs not rubbish.

It all depends on the size and shape of cam you want to run. Small rollers are available but personally I wouldn't use one on a streeter that was going to be driven a lot.

Cheers Jock

Forgot - also used to back off rockers immediately after racing ceased so as to allow springs to be relieved of pressure.
Do these problems extend to hydraulic rollers?
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Old 05-19-2005, 22:51   #10 (permalink)
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Re: Solid Cam Or Roller Solid

I will say no, many windsors are hydraulic roller cammed from factory.
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