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Sam
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« on: March 12, 2010, 12:02:31 am » |
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Guys as you may remember I had some issues with my cb 7 degree valve locks pulling through the reatiners at only a 180lb seat pressure. Anyways I have the parts to put my engine back together
I'm going with the VW 650 valve springs and going to run the CB supergrip valves, I got titanium retainers, but are those an improvement over the chromolly ones? Is there some say 8 degree locks that won't pull through? Anyone else have similar problems, what did you do?
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embarrassing V8 guys since 2002
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JVance
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« Reply #1 on: March 12, 2010, 02:35:48 am » |
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Maybe you just received a bad batch?
I've been running Crower keepers and Ti retainers at about the same seat pressure (and 420 lbs over the nose) with CB's RaceMaster valves without any issues. The 7 degree keepers are generally fine, and mismatching a keeper with a different angle will not help you.
Be sure to run keepers that are matched to the retainer. It's not just the angle, but the diameter, too. Buy the retainers and keepers from the same company; don't take a chance with a generic or unknown Ti retainer and somebody else's keepers.
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Thanks Rocky Jennings, DRD, and Pauter -Stripped66
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Sam
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« Reply #2 on: March 12, 2010, 10:54:49 am » |
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I've got all stuff from CB, but it failed last time, a $400 bill for me to fix it, now i'm putting better springs in and i suspect the problem will get worse. Why is noone else having these sorts of problems? What do yall drag racers do? My engine probably had 20 or so hours on it do these parts fatigue that quick?
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embarrassing V8 guys since 2002
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JVance
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« Reply #3 on: March 12, 2010, 11:38:28 am » |
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Again, maybe you received a bad batch, or even the wrong keepers? Why didn't you address the issue with CB? I don't use their springs, retainers, or keepers so I can't comment on the quality/fit of their stuff.
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Thanks Rocky Jennings, DRD, and Pauter -Stripped66
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Sam
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« Reply #4 on: March 12, 2010, 12:31:17 pm » |
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Every one i talked to said they had never heard of it, didn't talk to Pat though, maybe i'll call and see if i can get his opinion.
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embarrassing V8 guys since 2002
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Ohio Tom (DdK)
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« Reply #5 on: March 13, 2010, 12:01:16 am » |
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Did I reply to your problem before?
I had a customer's motor in here not long ago. It had CB heads that the owner had installed with single valve springs. He had valve float so bad that the retainers were tagging the top of the valve guides. This caused the keepers to pull thru and crack.
We replaced the valves, keepers and retainers.
I also clearanced the guides and installed dual springs.
Also, I belt sand the keepers so that they don't touch when installed on the valve. This locks everything up solid.
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Ohio Tom Simpson. Home of the Killa' Bee.
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Sam
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« Reply #6 on: March 14, 2010, 10:00:09 pm » |
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WOW, I don't believe mine were floating, my piston/valve clearance is so tight i would have marks. The only piston that was marked was the one that the keeper pulled completly through. You may have seen the pics, it had the lash cap stuck in the retainer still!
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embarrassing V8 guys since 2002
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