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.
AZZA
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.
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.
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.
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..
__________________ F6: the fastest factory 4 door falcon in the world!
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?
__________________
The cop said "Do you know why I pulled you over". I said " Well, that all depends on how long you have been following me!"
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Re: Solid Cam Or Roller Solid
Linear Mode
