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  #41  
Old 02-16-2015, 09:36 AM
scarter770 scarter770 is offline
 
Join Date: Mar 2011
Location: fort worth,Texas
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Hi Jay

I have the IO540
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  #42  
Old 02-16-2015, 10:01 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
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Quote:
Originally Posted by Mel View Post
Interesting that #2 & #3 exhaust have such different lifts when they both operate off of the same cam lobe. What and I missing?
Wear.

Cam lobes can and do wear during break in, especially if the lifter base was not properly ground or an inadequate lube used. The break in process for cam/lifter interface is very challenging in the first 30 minutes. The wrong oil is enough to wreak havoc. We have been having this problem in the auto world with non-roller lifters since they mandated the ZDDP out of the oil 10 years ago.

Larry

EDIT: sorry, I mis-read your question. That is an odd finding. no explanation here. Could be a measurement error. If it is the same lobe, I don't believe it is possible to get different readings, if the reading is taken from the lifter base or push rod if spring is removed from plunger.

Last edited by lr172 : 02-16-2015 at 10:06 AM.
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