At 04:05 PM 7/29/99 +1000, Neil Cotty wrote:
>... Was just speaking to Hans Pedersen .... I asked him why he thought I
couldn't rev her past 5500rpm before she got really thrashy and refused to
climb higher.
>
>According to him Valve springs as fitted to our cars are only really rated
for a max. of 60,000mls of use, and that doesn't take into account the
constant tension the springs are under while just sitting in the car, which
makes them slack over time.
>
>My A has done around 110,000mls. Maybe that explains it Barney - why you
can rev to the redline and I can't - ? :)
I don't think so. I've never bought a new valve spring in my life. My car
has about 300,000 miles on it, at least 120,000 miles that I know of on the
current set of valve springs (probably more). However, I do occasionally
shim a low one just to make tham all equal free height.
Barney Gaylord
1958 MGA with an attitude
http://www.ntsource.com/~barneymg
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