Quote:
Originally Posted by dragracerray
Alan what is a PAT gage?
Ray
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Ray,
The original "PAT" gauge that I speak of was developed by Traco Engineering, a couple of decades back, when they were working with GM in the development of the LS based engine racing program. GM required assistance because they could not get the LS engines to "seal up" and stay sealed up. It turns out that the bores on the LS engines of the time were never truly round. Even in the production engines, when no problem was present. It "appeared" that they were round. On machines, and with gauges, they "measured" round. Well, it turns out a regular "Sunnen style" dial bore gauge doesn't actually measure roundness with any real accuracy. So the "PAT" gauge was developed. The new CNC hones followed shortly thereafter.