> Thanks for the conformation Marc.  Data is a lot more reliable when it is
> repeatable.
> I'll pass along another anomoly  I've noticed.  Maybe someone else has
seen
> this one as well and knows an answer.  I have replaced my pressure cap
> several times with a Stant 16 PSI cap.  It seems to hold 16 psi when new
but
> in very little time (10 - 20 hours of use?) the holding pressure is down
to
> around 10 psi where it stays.  Anyone else see this?  I'm going to order a
> 20 psi cap from CR Racing & see if it does any better.
>
> Tracy
>
Tracy, I have been using a 24 psi CR Racing cap for over 100 hours, it
quickly settled down to releasing at 21 psi (based on my coolant pressure
gauge reading) and has remained at that to the current time.

Ed Anderson