[Z06] solid lifters
Burning Brakes
Joined: Feb 2006
Posts: 782
Likes: 0
do it all the time with GenV stuff, running solid lifters tightly lashed (6-8 th. or so) on HR cam to extend rpm....not sure why you would want to do it on the LS7 though, especially since there all good aftermarket HR lifters...
Drifting
Joined: Dec 2006
Posts: 1,665
Likes: 2
From: Down on the bayou La.
I am about to, done it on plenty non-lsx motors. The seat and open pressures required to control a solid-roller are not much more than the hyd. rollers we run now. If u are still using stock valves I would not do it for the street. If the motors' duties required using heavier valvetrain and rpm was lost, the solid is the easy way out, but at the cost of valve/seat wear, and regular lash-adjustments. I will be testing 2-3 s/r cams this winter, and they will be on the "small side" of big
U would need a short-runner/large-plenum intake to take advantage of the solid (mechanical if u prefer) roller rpm capability. For me it's about getting the rpm I want AND having the valvetrain good 100s of rpms past where I need it. Much more precise valve control, and if u think the lsx has loud valvetrain......be prepared. Adjustable rockers are a must here, not an option.
U would need a short-runner/large-plenum intake to take advantage of the solid (mechanical if u prefer) roller rpm capability. For me it's about getting the rpm I want AND having the valvetrain good 100s of rpms past where I need it. Much more precise valve control, and if u think the lsx has loud valvetrain......be prepared. Adjustable rockers are a must here, not an option.
Melting Slicks
Joined: Feb 2006
Posts: 3,271
Likes: 182
From: Manassas VA
If you are going to do this and the car is street driven be sure to get the type with pressure fed roller bearings. Normal roller lifter, used in race only applications, often don't have this feature which is usually electro machined in the lifter body.
Without this feature the bearings won't do well on the street since they are only splash lubricated and running around town there is not much splash. In race only applications this is not much of a problem although a lot of drag motors with valve lifts approaching 1 inch and 1000 pound over the nose spring pressure use them to try and extend lifter bearing life.
Without this feature the bearings won't do well on the street since they are only splash lubricated and running around town there is not much splash. In race only applications this is not much of a problem although a lot of drag motors with valve lifts approaching 1 inch and 1000 pound over the nose spring pressure use them to try and extend lifter bearing life.
Burning Brakes
Joined: Feb 2006
Posts: 782
Likes: 0
I am about to, done it on plenty non-lsx motors. The seat and open pressures required to control a solid-roller are not much more than the hyd. rollers we run now. If u are still using stock valves I would not do it for the street. If the motors' duties required using heavier valvetrain and rpm was lost, the solid is the easy way out, but at the cost of valve/seat wear, and regular lash-adjustments. I will be testing 2-3 s/r cams this winter, and they will be on the "small side" of big U would need a short-runner/large-plenum intake to take advantage of the solid (mechanical if u prefer) roller rpm capability. For me it's about getting the rpm I want AND having the valvetrain good 100s of rpms past where I need it. Much more precise valve control, and if u think the lsx has loud valvetrain......be prepared. Adjustable rockers are a must here, not an option.
U would need a short-runner/large-plenum intake to take advantage of the solid (mechanical if u prefer) roller rpm capability. For me it's about getting the rpm I want AND having the valvetrain good 100s of rpms past where I need it. Much more precise valve control, and if u think the lsx has loud valvetrain......be prepared. Adjustable rockers are a must here, not an option.http://www.quicktimeperformance.com/QTEC/index.php
and then you can have the sound of the s/r with open headers....
Thread Starter
Pro
Joined: Dec 2007
Posts: 596
Likes: 2
From: Boston MA
I am about to, done it on plenty non-lsx motors. The seat and open pressures required to control a solid-roller are not much more than the hyd. rollers we run now. If u are still using stock valves I would not do it for the street. If the motors' duties required using heavier valvetrain and rpm was lost, the solid is the easy way out, but at the cost of valve/seat wear, and regular lash-adjustments. I will be testing 2-3 s/r cams this winter, and they will be on the "small side" of big U would need a short-runner/large-plenum intake to take advantage of the solid (mechanical if u prefer) roller rpm capability. For me it's about getting the rpm I want AND having the valvetrain good 100s of rpms past where I need it. Much more precise valve control, and if u think the lsx has loud valvetrain......be prepared. Adjustable rockers are a must here, not an option.
U would need a short-runner/large-plenum intake to take advantage of the solid (mechanical if u prefer) roller rpm capability. For me it's about getting the rpm I want AND having the valvetrain good 100s of rpms past where I need it. Much more precise valve control, and if u think the lsx has loud valvetrain......be prepared. Adjustable rockers are a must here, not an option.
Pro
Joined: Mar 2005
Posts: 706
Likes: 0
From: San Jose Ca
With the street solids out there that require little maintance and run tight lashes, I have wondered why GM has not used them. Maybe they won't last fo the long hall. In a 7k+ RPM motor, it's the way to go
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Drifting
Joined: Dec 2006
Posts: 1,665
Likes: 2
From: Down on the bayou La.
I have an HP tuners data-log of a members' Z06 from last fri night at the track, showing 7600 rpm and other than a KR of 1*, motor did not miss a beat. FWIW, it was a lethal cammed car. He did not mean to shift that high, but he will get it. This just goes to show the pressures (for solid) are almost there now, but I think over-all reliability/durability of the valve-job as well as production tolelances and the fact they have no adjustability from the factory.
