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Cam Break in ??? Need some advice

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Cam Break in ??? Need some advice

Old 05-30-2003, 07:59 PM
  #11  
stevejohns
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did you know that the stk rockers bind when you us more than 570 lift? Guess who now has roller rockers and 400 less bux?
 
Old 05-31-2003, 01:19 AM
  #12  
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Safe bet is to use the GM EOS (engine oil supplement) Mr Daniels recommends. It has anti scuffing agents that will help keep the contact surfaces between cam and lifters from galling. If you run the outer spring only, remember not to over-rev.

The recommended procedure is to make sure timing, carb, etc are ready to go. Start engine and immediately run up to 2000 RPM, working the engine between 2000 and 3000 or so for about 20 minutes, then shut down. Check valve lash and note any signifigant changes. I like to witness mark the rocker nuts with a little dab of paint so I know if one has backed off. If there is any major change, you may have a lobe problem and it is better to find it now than to run the engine with glitter floating around.
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Old 05-31-2003, 11:47 AM
  #13  
Allan4
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Originally posted by Mbam
We keep used to keep a set of 1.55 rockers around for the not too radical engines (big block is normally 1.7), reduces lift and load for break in, easier than changing springs. But kept a set of worn out outer only springs for the big stuff. As we always did a retorque it was not that much extra work.
BAM Motorsports from The Cup Series?
 
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