Comp Cams Ultra Pro Magnum rocker arm review
#22
Thats is totally untrue. I had a set of Crane golds with a CC306 and they failed so I don't have much faith in those Cranes either. I went to a solid roller/shaft monut rockers, Manton pushrods and anytime I check lash it's always perfect.
#23
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The detail you supply regarding your failure is overwhelming. What I get is it's "totally untrue" in your opinion. I wonder when mine are going to blow up...
Last edited by SS RRR; 08-19-2010 at 07:44 AM.
#24
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Just curious, do the ultra pro mags click like the scorpions when you tighten down the poly lock? I kinda dig that, takes a little of the paranoia out of wondering if they are tight enough...
#30
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So maybe you aren't "properly" adjusting them as you might think.
#31
Its common for poly locks to get lose unless locked up with a final snug/bump/twist. I really liked how he pointed out all the clearance checks for the rocker arm and some of the results of not doing so - for those with roller rocker arm noise. Myself i tighten the poly nut until the p-rod just starts to drag but can see how that can be overdone if watching the poly nut instead of the p-rod. That screw thread adds a lot of mechanical advantage and it would be easy to over-tighten when just looking at the nut. Nothing wrong with just getting the up and down slack out for setting zero lash.
Thx for sharing.
BTW the video is wrong with regard to maximum power using 1/8 turn though. Oil aeration is worse with less pre-load. And yes some will set preload to fix the piston travel as low as 0.010" using feeler gauges for those in disbelief.
Thx for sharing.
BTW the video is wrong with regard to maximum power using 1/8 turn though. Oil aeration is worse with less pre-load. And yes some will set preload to fix the piston travel as low as 0.010" using feeler gauges for those in disbelief.
#32
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Originally Posted by cardo0;18754484
BTW the video is wrong with regard to maximum power using 1/8 turn though. Oil aeration is worse with less pre-load. And yes some will set preload to fix the piston travel as low as 0.010" [B
BTW the video is wrong with regard to maximum power using 1/8 turn though. Oil aeration is worse with less pre-load. And yes some will set preload to fix the piston travel as low as 0.010" [B
using feeler gauges[/B] for those in disbelief.
And that is true to an extent. It really depends on lifter pre load.
But the video is really informative and the guy is clear and basic.
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I hear ya. I doubt it's a "seat of the pants" type difference unless the motor is really pushing some power. Plus, on a street car, I'd sacrifice a few horsepower for a quiet valvetrain....
#35
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#36
Testing preload adjustments for results would need controlled conditions and recorded results. If u think every engine oil and every engines windage oil control is the same then there is no difference in preload settings in your mind and nothing can change that. U can be happy with using hearsay to set your preload by your feelings instead of facts.
#38
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If I recall correctly, the directions for my Pro Mags stated 1/2 turn preload. That's where I set them.
http://www.compcams.com/Instructions/Files/151.pdf
As far as poly locks(purchased ARP) loosing up, I torqued the allen(while holding the nut in place to maintain 1/2 turn preload) to 30 lb-ft. If you use a torque wrench, there is no guessing if you got them right.
I have not touched them in 5 years. None have loosened up.
http://www.compcams.com/Instructions/Files/151.pdf
As far as poly locks(purchased ARP) loosing up, I torqued the allen(while holding the nut in place to maintain 1/2 turn preload) to 30 lb-ft. If you use a torque wrench, there is no guessing if you got them right.
I have not touched them in 5 years. None have loosened up.
Last edited by ACE1252; 04-15-2015 at 06:36 PM.
#40
TECH Resident
If you think I'm trusting your experience over Comp Cams instructions you are an even bigger idiot than I already know. Nothing personal. You have simply shown far too much ignorance in your knowledge base for me to ever trust you. Along with no willingness to learn or admit to when you are wrong. I think you just like to troll anyone who has sense enough to know when you are full of it and point it out.
Last edited by ACE1252; 04-15-2015 at 10:40 PM.