Tim Bancroft Posted June 2, 2013 Share Posted June 2, 2013 Found this whilst trawling the net:http://www.wbclassics.com/tech/tr6/engine/triumph-tr6-cast-piston-comparisonI think it was written in 2005? Quote Link to comment Share on other sites More sharing options...
junkuser Posted June 2, 2013 Share Posted June 2, 2013 Good old REPCO.Sad they could not compete with the large turnover companies in other parts of the World.Sir Jack had a good run from components made by them. Quote Link to comment Share on other sites More sharing options...
Hogie Posted June 2, 2013 Share Posted June 2, 2013 I've had County pistons in my 4A for the last 15 years (140,000miles) with no problems.I wonder how they took the hardness readings. The Rockwell tester uses quite a high impact force (Rockwell C uses 150lbs) to feel the subsurface hardness.There are superficial testers that 'replicate' Rockwell but use 1 or 2Kg so only testing the top few thou. Anything can affect the readings.Roger Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted June 2, 2013 Share Posted June 2, 2013 Counties in my PI rebuild. Dimensionally good and spot-on for weight. Still early to comment on longevity....Nick Quote Link to comment Share on other sites More sharing options...
StagNL Posted June 2, 2013 Share Posted June 2, 2013 I have County flat top pistons in my Stag engine. There was a spread in weight of around 5-10 grams but that I narrowed down to 0.5 over the whole set.Otherwise they are very good in regards to finish. Quote Link to comment Share on other sites More sharing options...
99176 Posted June 3, 2013 Share Posted June 3, 2013 Always used County items.Wrist pins are a trifle weighty, but no other issues. Quote Link to comment Share on other sites More sharing options...
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