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On 7 Nov 2001, at 18:34, Tom Hansen wrote: > Chromoly push rods expand about half as much as stock alum. PRs. I know, I > tested them in my oven and used my 12" dial calipers. Alum @ 200F grew .016", CM > @ 200 only grew .008". Same length push rods. You're right. I was confusing this with the density ratio. The thermal expansion factors for the two are: Alum: 13 ppm/degF Steel: 6 ppm/degF - Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------------------------- Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe