mope44 wrote:in this procedure we play on the coefficient of friction of the villebrequin which bathes in oil, for those who have already seen the villebrequin is a hot rolled metal which gives a pigskin appearance (or your wife's skin when she is pregnant) which gives a lot of resistance to the gold movement in the oil;
as I said it is very long since for arrival of the pigskin aspet with the polished aspect mirror this account in a hundred hours easy and that with the equipment that is going well, of course !!
The crankshaft does not touch the oil level except on the small mower engine, some manufacturers mount them on needle bearings, but a super polishing, or even chrome worn does not bring much gain. When running there is no direct contact, there is a thin film of oil
polishing is sometimes harmful on the cylinders. a cylinder in nitrated steel or cast iron we pass the stones to make crossed micro-scratches, a chrome cylinder its surface is like an asphalt paving full of small cracks which allows the oil to stay attached
Even the cylinders covered with nickel carbide, or ceriminil are not polished shiny it has a matt appearance.
@Flytox
Initially on a Jetta son had installed a booster pump for the oil market, and it was while returning to diesel that he realized that he was doing more km with a full tank (no scientific measure just a finding . )
I even generously enlarged the tank suction line with a 16 mm line.
On the Jetta and Golf old mechanical pump, the pump aspires to pass through a 5 micron filter if less restriction it ocasionne, a lack of fuel pressure at the pump and also this promotes air bubbles if the system is not perfect (on some cars the low pressure pump is separated it pushes the diesel in the filter it is less bad.)
What intrigued me (without air bubbles, the simple fact of having a lack of pressure on the low pressure side of diesel fuel caused a lack of power ok, but overconsumption?
Andre