Bill.... I think Jerry came up with the exact right answer.... What I have
to tell you is that he was #2.... Dave decided the same thing yesterday
morning.... we were chatting on the phone about it.... and I explained the
exact whole pass.... and his answer was springs causing lifter issues....
shaaaaSaaammm cam issues followed by rod issues....
Moral to the story.... hmmm Run a Roller cam?.... Don't let in-experienced
folks drive the car? Never make a pass without the Data acq turned on? So
on and so forth... The only issue I have with this is one of the greatest
joys I've had running this car is sharing it.... so I doubt that is going to
change....
By the way the Rpm limit was at 6000 ..... The Hydraulic cam was good for
around 6800 according to Comp Cam's.... and the springs were backed off
between seasons.....
Keith
----- Original Message ----- > ----- Original Message -----
> From: "Jerry Davis" <jerry.davis@arcnc.com>
> To: "'Bill Pokey Bennett '" <bennevl@bellsouth.net>
> Sent: Wednesday, February 19, 2003 8:46 PM
> Subject: RE: Motor Autopsy
>
>
> > The lifters broke due to separation..massive contact loads and stresses
> > when the valve lifter launches off the nose of the cam (agressive valve
> > opening acceleration and velocity). If there were any broken valve
> springs,
> > it's pretty definate that there was separation. It's an awesome thing to
> > see. The valve spring can be over stressed and start to weaken with only
> > minimal separation. I've seen only one broken cam due to this, but I've
> seen
> > countless lifters destroyed (hydraulic lifters, not solid).
> > JD
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