LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

First start after cam

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Old Aug 23, 2008 | 11:22 PM
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GMH94Z28's Avatar
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First start after cam

I finished up my cc503 cam install today and it started up fine and ran fine but there is high treble sound coming from the engine area. I can hear the sewing machine sound from the roller rockers. I am thinking that maybe they could be hitting the valve covers. I did cut some of the baffling out of them maybe not enough.
Old Aug 24, 2008 | 09:40 AM
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The sewing machine is very typical. Anything more than that and it's worth your while to at least pull the drivers rocker cover and take a look.
Old Aug 24, 2008 | 11:29 AM
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Originally Posted by GMH94Z28
I finished up my cc503 cam install today and it started up fine and ran fine but there is high treble sound coming from the engine area. I can hear the sewing machine sound from the roller rockers. I am thinking that maybe they could be hitting the valve covers. I did cut some of the baffling out of them maybe not enough.


Did you get a tune for it also, or are you running stock programming.....I ask because I am so close to ordering that cam right now its crazy
Old Aug 24, 2008 | 11:41 AM
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SS MPSTR's Avatar
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pro-mags are not quiet.
Old Aug 24, 2008 | 01:39 PM
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Not to hijack, but what other rockers are recommended that are as good as the pro-mags but not as noisey?
Old Aug 24, 2008 | 10:25 PM
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I readjusted the rr and all is quiet now. I did get a tune from ion (madtuner). It is nice and quiet now. Here is a link to a video of it.
http://gh94z28.diinoweb.com/files/ and click on the only avi file.
Old Aug 24, 2008 | 10:44 PM
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Great to hear you got em to quiet down, just don't overtighten.
Old Aug 25, 2008 | 12:15 AM
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Sounds very nice, what is your idle speed?
Old Aug 25, 2008 | 09:30 AM
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Right now it is set to 750.
Old Aug 25, 2008 | 09:54 PM
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I took some more video tonight one is at 750rpm and the other is at 800rpm. Not much of a difference. I love this cam sounds. http://gh94z28.diinoweb.com/files/ they are a little smaller so they should open faster.
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