Any HR guys spinning to atleast 7500 RPM
05-10-2011, 08:27 PM
#21
The lifters are what get you money wise. Any decent solid roller lifter will be $500, with some going well over a grand. You have to read up on them too, because some of them are race only and won't have the proper oiling to live on the street.
These are good for LT1 guys:
http://www.summitracing.com/parts/CCA-888-16/
.300" taller so the link bar clears the valley, and they have the extra oiling groove for street use and low-rpm use.
These are good for LT1 guys:
http://www.summitracing.com/parts/CCA-888-16/
.300" taller so the link bar clears the valley, and they have the extra oiling groove for street use and low-rpm use.
05-11-2011, 02:20 PM
#30
and just to set everyone straight, EVERY solid roller lifter will eventually fail or be beaten out of spec. It's just a question of when, and it doesn't matter if you're running a crane ultra-pro, isky red zone, or whatever the latest private label fancy names are, all of them can fail in a moments notice. Tight lash cams help, as well as non-offset pushrod cups help, spring pressure doesn't seem to matter much as long as you're controlling the valve and you have a stiff pushrod.
05-11-2011, 03:14 PM
#31
and just to set everyone straight, EVERY solid roller lifter will eventually fail or be beaten out of spec. It's just a question of when, and it doesn't matter if you're running a crane ultra-pro, isky red zone, or whatever the latest private label fancy names are, all of them can fail in a moments notice. Tight lash cams help, as well as non-offset pushrod cups help, spring pressure doesn't seem to matter much as long as you're controlling the valve and you have a stiff pushrod.
05-11-2011, 10:11 PM
#32
An advantage with a hydraulic setup is you don't have the shock on the roller as you do with a lash-type valvetrain. An important thing to remember is the lash take-up ramp on the solid lobe is very specific to the lobe profile/family. If you have a recommended lash range I wouldn't go any looser or you WILL pound the rollers/bearings out of it. Tight lash solid rollers can be easier on the lifters, but you end up with valve action more like a hydraulic style with a longer seat to seat. It's always a balance, the mild street roller stuff looks like a flat tappet profile compared to a newer radical HR profile.
05-12-2011, 07:13 PM
#33
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I ran a good size solid roller about five years ago and it didn't last on the street which is why I went back to HR. I ran the car for one summer and a lifter came apart and when we pulled the motor apart the lifter or what was left of it was jammed in the lifter bore.
05-12-2011, 09:08 PM
#34
An advantage with a hydraulic setup is you don't have the shock on the roller as you do with a lash-type valvetrain. An important thing to remember is the lash take-up ramp on the solid lobe is very specific to the lobe profile/family. If you have a recommended lash range I wouldn't go any looser or you WILL pound the rollers/bearings out of it. Tight lash solid rollers can be easier on the lifters, but you end up with valve action more like a hydraulic style with a longer seat to seat. It's always a balance, the mild street roller stuff looks like a flat tappet profile compared to a newer radical HR profile.
05-13-2011, 05:57 PM
#36
I just don't like pin-oiled lifters becoming the latest and greatest regurgitated bullshit you see on the lt1 forums. Or morel lifters being touted as the end all be all for solid roller longevity problems. There's what, 6 solid roller LT1s on the forums right now, and 2 are street driven? C'mon.......
