I expected the higher cold pressure, too. What I didn't expect was higher hot
at idle, because the valve should be
fully closed (shimmed spring or not).
Bob
On 5/1/2011 6:16 PM, Robert Blair wrote:
> Result is what I would expect - 70 cold should not a problem, but dont run it
> at 4krpm till it warms a bit.
>
> A coil spring exerts a pressure proportional to the compression. So by
> compressing the spring more when seated, you require a higher pressure to
> move it of the seat. You are simply moving its operationg point up the
> pressure curve.
>
> Ideal 3k rpm hot would be 55ish, 1k idle hot would be 35ish.
>
> Robert N. Blair Yellow 65BJ8 RNBmail at yahoo.com
>
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Bob Spidell San Jose, CA bspidell at comcast.net
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