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Registered
Join Date: Feb 2003
Location: chicago
Posts: 1,077
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valve spring retainers
Hi all, Are the new stock retainers ok with higher rate valve springs? I don't want or need titanium retainers, is there an upgraded non-ti retainer available? is it also a good idea to replace the keepers?
thanks!
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BMW 128i 73 rsr clone - sold 68 912 project to become 911r (almost done!) |
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01-26-2011, 09:51 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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I wouldn't use the '78-on retainers with stiffer valve springs.
The 3.0 & later ones are sintered, not machined and that means they can fracture if you ever miss a shift. The 2.7 and earlier ones are machined steel and will not break. If you are going to run the engine to 7K (or beyond), I'd be using Ti ones to raise the threshold of valve float. Its simply good insurance. The keepers should be closely inspected, but they are very durable.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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01-26-2011, 10:10 AM
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Registered
Join Date: Mar 2004
Location: So. Ca.
Posts: 521
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Keepers are fine but make sure that the step height from inner to outer spring is the same in your application if you are combining a bunch of parts this could be an issue.
regards |
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01-27-2011, 06:41 AM
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Join Date: Dec 2002
Location: Long Beach, CA
Posts: 1,262
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Is there a way to tell the sintered retainers from the forged ones visually?
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08-10-2014, 06:39 AM
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