Like my buddy Jeff says........"They all fail, just a matter of when"......than being said, I had success with GS Ultra Pro, and the Morels. I ran a .842 lifter. Alot is going to have to do with the weight of the components, and how pissed off the lobe is. Good Luck fella...
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Originally posted by lun40119 View PostLike my buddy Jeff says........"They all fail, just a matter of when"......than being said, I had success with GS Ultra Pro, and the Morels. I ran a .842 lifter. Alot is going to have to do with the weight of the components, and how pissed off the lobe is. Good Luck fella...
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My cam this year was the same as last year. Lift is .866/.848, spring pressure is 130 seat, 580ish open. First DW I ran a GS Ultra Pro, no issues.......second year, I had Morels in it. On the last day about 70 miles south of Tulsa number 7 intake lifter failed. 2 possible scenarios, not for sure which came first. Either it had a soft needle, or the hard surface on the cam failed. Ill be switching to a larger keyed Jesel lifter this year with a tool steel core.
Here is the valve trace of my intake lobe at 8000rpm.......so I know the valvetrain is under control, so I don't blame spring pressure, or lack of valvetrain control......the red line is the valve trace at speed, the dark line is the valve baseline. The line in the middle is the "delta".....it showes deflection/loft.
Last edited by lun40119; April 21, 2013, 01:43 PM.Team Clueless
1st Place SB/NA DW12
2nd Place SB/NA DW11
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Originally posted by lun40119 View PostMy cam this year was the same as last year. Lift is .866/.848, spring pressure is 130 seat, 580ish open. First DW I ran a GS Ultra Pro, no issues.......second year, I had Morels in it. On the last day about 70 miles south of Tulsa number 7 intake lifter failed. 2 possible scenarios, not for sure which came first. Either it had a soft needle, or the hard surface on the cam failed. Ill be switching to a larger keyed Jesel lifter this year with a tool steel core.
Here is the valve trace of my intake lobe at 8000rpm.......so I know the valvetrain is under control, so I don't blame spring pressure, or lack of valvetrain control......the red line is the valve trace at speed, the dark line is the valve baseline. The line in the middle is the "delta".....it showes deflection/loft.
valve with only 130# at seat and 580# on the nose... I have
250# on seat and just over 600# at .640 lift and it might be
on the lite side at 6500 rpm(it goes into a cycle like a valve float)
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Originally posted by MR P-BODY View PostWOW... I would have never thought you could control the
valve with only 130# at seat and 580# on the nose... I have
250# on seat and just over 600# at .640 lift and it might be
on the lite side at 6500 rpm(it goes into a cycle like a valve float)
You are probably hearing valve bounce.Last edited by lun40119; April 22, 2013, 05:43 AM.Team Clueless
1st Place SB/NA DW12
2nd Place SB/NA DW11
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Originally posted by lun40119 View PostLight parts.......
You are probably hearing valve bounce.
SS valves which are heavier but I'm still running way more
pressure than you... yes the dyno operator and myself thought
it was most likely a spring issue at 6500 rpm... we didnt try to
pull past it to see if it was a certain frequency ... I'm looking into
a different set of springs
I still find it amassing you run less spring pressures than even a hyd cam
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Originally posted by MR P-BODY View PostSo I will assume you are running tit valves... I'm running
SS valves which are heavier but I'm still running way more
pressure than you... yes the dyno operator and myself thought
it was most likely a spring issue at 6500 rpm... we didnt try to
pull past it to see if it was a certain frequency ... I'm looking into
a different set of springs
I still find it amassing you run less spring pressures than even a hyd cam
What you are hearing on the dyno is probably valve bounce, you can see it on this graph.....
Last edited by lun40119; April 22, 2013, 07:46 AM.Team Clueless
1st Place SB/NA DW12
2nd Place SB/NA DW11
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Yep......loft isn't bad, as long as the system lands smoothly....it is all cause and effect....excessive deflection, equals excessive loft. In a perfect world, there would be no deflection.Team Clueless
1st Place SB/NA DW12
2nd Place SB/NA DW11
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Originally posted by lun40119 View PostYep......loft isn't bad, as long as the system lands smoothly....it is all cause and effect....excessive deflection, equals excessive loft. In a perfect world, there would be no deflection.
maybe I should look into ti valves to lighten up my junk.. but the last time I
bought ti valves they were $140 each(that was about a year ago)
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