RE: Another cam bites the dust

[dwalters@xxxxxxxxxxxx]

Bill M wrote:
> 
> I spoke to a friend of mine lest night, and just a couple of starts
> after changing to diesel oil, he has wiped his cam. The motor is a 400
> punched and stroked to a 451? i think, and it does have a ~.600" cam
> w/ solid lifters...non-roller. He had the Valvoline VR Racing oil in
> it and changed it to the diesel oil because he couldn't find the VR.
> He has not driven the car since the change, just started it 2-3 times
> since changing the oil. After the new oil, it started sounding funny.
> He checked valve lash and one was really loose. He's going to switch
> over to a roller setup so he doesn't have to screw with this oil mess
> anymore.
> 
> He called the cam manufacturer and they said they continue to have
> issues w/ the new oils, and the zinc in the diesel oils is going to be
> reduced even more soon. Time to stock up in the VR when you can find
> it I guess!
> 
> -- 
> Bill M
> 65 Coronet 500 'vert http://1962to1965mopar.ornocar.com/mmo62008.html
> 73 Dart Sport, 00 Cherokee, 01 Dakota

I advocate the use of EDM lifters in all solid cam applications, as well 
as a ZDDP additive when "good" oil can't be found. Spring pressures also 
enter into the decision to go with a roller set up. Roller lifters may 
not wipe a lobe, but they do break. I'm running a very fast (near roller 
specs) ramp Comp solid cam with EDM lifters, 350# open pressure, and 
Brad Penn Racing oil.  

For oils, I recommend Brad Penn Racing and VR-1. 

Dave Walters
Aurora, Co.


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