I have found the CURE! for SR cam valve adjustments!
12-29-2009, 03:36 PM
#1
I have found the CURE! for SR cam valve adjustments! no more hassel with constant valve adjustments!
cool idea, idk if itll work with SR though.
http://www.youtube.com/watch?v=GXIdOTkJhEY
cool idea, idk if itll work with SR though.
http://www.youtube.com/watch?v=GXIdOTkJhEY
12-29-2009, 04:02 PM
#2
Interesting concept, less drag on the valvetrain too (no spring pressure to overcome).
You'd need more room for the cam since you need the track.
EDIT Looks like it's been discussed : https://ls1tech.com/forums/advanced-...alvetrain.html
Additional info:
http://www.freepatentsonline.com/6945206.html
http://www.decuirenginetechnologies....glessvalve.php
You'd need more room for the cam since you need the track.
EDIT Looks like it's been discussed : https://ls1tech.com/forums/advanced-...alvetrain.html
Additional info:
http://www.freepatentsonline.com/6945206.html
http://www.decuirenginetechnologies....glessvalve.php
Last edited by James Montigny; 12-29-2009 at 04:11 PM.
12-30-2009, 08:33 AM
#6
Launching!
Dunno what the deal is with that. Polylocks have come a long way to making this a thing of the past. I had a nice Comp solid flat tappet cam in a big block vette a few yrs ago and I never adjusted the valves. I would check them over the winter layup but I never ever had to adjust them. This was ARP polylocks, not some cheap chinese knockoff.
12-30-2009, 08:51 AM
#7
That setup would do nothing to eliminate valve adjustment. Its sole puropse is to pull the valve shut since there is no spring.
A solid roller will always require some type of lash so it can compensate for thermal expansion or the valve may not be allowed to close completely. As stated above, if you want to eliminate lash, use a hydraulic cam.
Keep in mind, a good valvetrain will barely move unless there is some sort of wear or deflection of certain parts. A good shaft mount rocker system will likely go for thousands of miles without adjustment. Valve seat wear, stretching valve stems under extreme use & cam/rocker/roller wear are what changes lash. I've seem some drag engines go a full season without the lash moving & also some serious street engines with 8-10,000 miles that were still OK.
The above video is a unique approach, but seems to have is own set of issues... From what I can see, it would take an accurate adjustment to be sure the valve is being pulled shut completely (and with enough force), to properly seal the cylinder.
A solid roller will always require some type of lash so it can compensate for thermal expansion or the valve may not be allowed to close completely. As stated above, if you want to eliminate lash, use a hydraulic cam.
Keep in mind, a good valvetrain will barely move unless there is some sort of wear or deflection of certain parts. A good shaft mount rocker system will likely go for thousands of miles without adjustment. Valve seat wear, stretching valve stems under extreme use & cam/rocker/roller wear are what changes lash. I've seem some drag engines go a full season without the lash moving & also some serious street engines with 8-10,000 miles that were still OK.
The above video is a unique approach, but seems to have is own set of issues... From what I can see, it would take an accurate adjustment to be sure the valve is being pulled shut completely (and with enough force), to properly seal the cylinder.
Last edited by Lonnies Performance; 12-30-2009 at 08:59 AM.
