Facts or opinions about SA Rockers and guide plates
#1
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Facts or opinions about SA Rockers and guide plates
I've gotten a deal on some rockers i couldnt refuse (crane Golds extruded Race rockers SA) ...i Really was set on buying 1.7's ...but,hell i nearly stole these 1.6's
The Theory with SA rockers is that they are unstable At higher RPMS Compaired to the NSA ones ?....At first glance the look nearly the same betweeen the two versions aside from the roller tip..
on SA rockers the tip is recessed and has an alighment plate or "fingers" on both sides of the tips roller that keeps it on the valve without needing guide plates ...AS the NSA rocker do not have the "Fingers"
So heres the million dollar question...
If you use guide plates WITH "SA" rockers,Wouldn't that resolve the high rpm Unreliability issue? I would like to think so...
Thoughts,opinions,and facts welcomed
Mike
The Theory with SA rockers is that they are unstable At higher RPMS Compaired to the NSA ones ?....At first glance the look nearly the same betweeen the two versions aside from the roller tip..
on SA rockers the tip is recessed and has an alighment plate or "fingers" on both sides of the tips roller that keeps it on the valve without needing guide plates ...AS the NSA rocker do not have the "Fingers"
So heres the million dollar question...
If you use guide plates WITH "SA" rockers,Wouldn't that resolve the high rpm Unreliability issue? I would like to think so...
Thoughts,opinions,and facts welcomed
Mike
Last edited by defaultexistence; 01-15-2011 at 03:21 PM.
#4
I've gotten a deal on some rockers i couldnt refuse (crane Golds extruded Race rockers SA) ...i Really was set on buying 1.7's ...but,hell i nearly stole these 1.6's
The Theory with SA rockers is that they are unstable At higher RPMS Compaired to the NSA ones ?....At first glance the look nearly the same betweeen the two versions aside from the roller tip..
on SA rockers the tip is recessed and has an alighment plate or "fingers" on both sides of the tips roller that keeps it on the valve without needing guide plates ...AS the NSA rocker do not have the "Fingers"
So heres the million dollar question...
If you use guide plates WITH "SA" rockers,Wouldn't that resolve the high rpm Unreliability issue? I would like to think so...
Thoughts,opinions,and facts welcomed
Mike
The Theory with SA rockers is that they are unstable At higher RPMS Compaired to the NSA ones ?....At first glance the look nearly the same betweeen the two versions aside from the roller tip..
on SA rockers the tip is recessed and has an alighment plate or "fingers" on both sides of the tips roller that keeps it on the valve without needing guide plates ...AS the NSA rocker do not have the "Fingers"
So heres the million dollar question...
If you use guide plates WITH "SA" rockers,Wouldn't that resolve the high rpm Unreliability issue? I would like to think so...
Thoughts,opinions,and facts welcomed
Mike
I ran crane gold SA's with no issues, but my combo was specced properly and I only spun to 6300. If you want to spin a lot higher I would look into NSA rockers.
#5
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Just a guess here as to why not to run SA rockers with guide plate is you would have two different parts of the vlavetrain trying to "guide" the SA rocker, the valve tip and push rod guide plate. This could cause binding or forced misalignment from one to the other if the two are not setup perfectly in-line with each other. I could see this causing all sorts of problems such as worn valve guides, rocker damage and maybe others.
This is just me thinking out loud, someone correct me if I'm wrong.
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^^^^Yea ...idk..
... the SA rocker ,pushrod,and valve are in the same location with or without a guide plate...I wouldnt think a guide plate changes the normal route/alignment of the pushrod..just reinforces it..unless..IF i'm wrong... there are adjustable guide plates available If for some reason a regular guide plate would mess with the rocker tips normal location....
... the SA rocker ,pushrod,and valve are in the same location with or without a guide plate...I wouldnt think a guide plate changes the normal route/alignment of the pushrod..just reinforces it..unless..IF i'm wrong... there are adjustable guide plates available If for some reason a regular guide plate would mess with the rocker tips normal location....
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#10
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Just a guess here as to why not to run SA rockers with guide plate is you would have two different parts of the vlavetrain trying to "guide" the SA rocker, the valve tip and push rod guide plate. This could cause binding or forced misalignment from one to the other if the two are not setup perfectly in-line with each other. I could see this causing all sorts of problems such as worn valve guides, rocker damage and maybe others.
This is just me thinking out loud, someone correct me if I'm wrong.
This is just me thinking out loud, someone correct me if I'm wrong.
#11
An engines valvetrain movements are far from predictable. No matter how closely you adjust parts with the engine off, they will not stay that way at high rpms.
There is a reason it is not recommended, and I would predict accelerated wear on the roller guides and most likely damage to the valve stem.
I've had a failed lifter wreck a Proform SA rocker tip, its not a good feeling to see that under a valve cover.
There is a reason it is not recommended, and I would predict accelerated wear on the roller guides and most likely damage to the valve stem.
I've had a failed lifter wreck a Proform SA rocker tip, its not a good feeling to see that under a valve cover.