<VV> LIFTER NOISE

[BobHelt at aol.com]

I have one minor light tapping on one bank after my long trip  last
> weekend--vairs adjust like small blocks--1/4 turn past  quiet?



In a message dated 4/4/2007 9:11:48 PM US Mountain Standard Time,  
westerncanadacorsa at shaw.ca writes:

Isn't  the KIND of lifter important information as well?  Is he using a  stock
lifter, or a SBC, or a Souce Deep  Dimple?




Well, please let me add my opinions to the pile. First the 1/4 turn. That's  
great,  but I want to be picky here  (ggg).     Let's go 1/4 turn in from ZERO 
 LASH.   "Quiet" might not occur until the piston is bottomed on a  collapsed 
lifter.
 
Now the range of adjustment ... 
 
I haven't been able to check EVERY type of lifter now being sold, but of  the 
five (plus stock) lifters i have checked, they ALL have about 0.130" piston  
travel. That's a minimum. Some have a little more. Doing some calculations, it 
 turns out that one turn of the rocker adjustment nut produces a piston 
travel of  0.0625".
 
Thus, 1/4 turn is collapsing the piston only about 16 thou.  And  the total 
piston travel allows about two full turns of the nut.
 
So, from an adjustment point of view, use any lifter you want because they  
all have about the same range.
 
Regards,
Bob Helt



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