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Autojumble / Re: BSA A10
« on: May 10, 2006, 08:07:55 PM »
Hi, yes, it's me again.
I'd like to add that thick oil causes high resistance to flow which causes the oil to pump out of the oil pressure release valve, reducing flow to bearings. thin oil causes the oil to flow easier through the bearings which, although causing a reduction in the oil pressure, increases flow through the bearings because it is not escaping ot of the pressure release valve, which has the net effect of cooling and lubricating the journals hence giving them an easier time.
An oil pump is available with increased pumping capacity. this, combined with thinner oil is, I think, a good idea.
Close tolerances of one-and-a-half to two-and-a-half thou max. used in conjunction with a new high flow oil pump and SAE15/40 or even SAE10/30 semi synthetic oil would, I believe, deliver better bearing life and better economy.
I realise this opinion might cause some controversy, especially among the "old hands" at this game.
A.
I'd like to add that thick oil causes high resistance to flow which causes the oil to pump out of the oil pressure release valve, reducing flow to bearings. thin oil causes the oil to flow easier through the bearings which, although causing a reduction in the oil pressure, increases flow through the bearings because it is not escaping ot of the pressure release valve, which has the net effect of cooling and lubricating the journals hence giving them an easier time.
An oil pump is available with increased pumping capacity. this, combined with thinner oil is, I think, a good idea.
Close tolerances of one-and-a-half to two-and-a-half thou max. used in conjunction with a new high flow oil pump and SAE15/40 or even SAE10/30 semi synthetic oil would, I believe, deliver better bearing life and better economy.
I realise this opinion might cause some controversy, especially among the "old hands" at this game.
A.