Quote:
Originally Posted by Catorce
I can't really divulge a huge amount until the patent papers come back (the invention is not supposed to be "out there" before the preliminary patent pending is granted), so I will talk exclusively about the Porsche squirters.
When I came up with my idea and developed my prototype, I purchased just about every type of factory squirter out there. It is no secret that they come in 6mm od and 6.6mm od sizes. It is also no secret that the orifice size of the jets is between 1.0 and 2.0mm depending on the year of the car. Lastly, within the squirter is a ball bearing and a spring; this mechanism is the check valve to prevent the squirters opening at idle and dropping the oil pressure.
I set up a test rig using pressurized water at exactly 40psi. This rig allowed me to shoot a jet of water through the squirters and show me their spray patterns. From here, I would lower the water pressure until the squrters just started to dribble out. In my testing, a factory squirter would begin to dribble with as low as 15psi of water.
Yes, I know water is not oil, but it at least provided an idea of what spring rate was used within the squirter. Also, there is the ball bearing to take into account; it is of a specific size so that the oil can pass AROUND it after spring pressure is overcome.
Lastly, I hooked up the squirters to shop air, and found that as little as 10psi of air pressure could open up the squirter.
So I am here to tell you that the "40 psi" and up number that people quote on the internet is patently WRONG. Porsche squirters are open LONG before that....which is a very good thing. They do not bleed off much oil pressure at all, and I tested the flow rates of various orifice sizes as well.
You WANT these things to open up at low pressures, just not at idle is all.
Mine use a check valve as well, but that is where the similarities end. I feel the check valve is important for street cars which idle a lot.
More to follow soon!
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Do you have an anticipated date when yours might be available? Price range?
Also, if a Porsche squirter has in fact failed in open mode, and dribbles at idle... how much effect on oil pressure is that? Your post suggests it likely isn't much.
And just as an educational point, since I love to learn, whats the damage if a squirter is stuck closed? I ask as it seems lots of folks find stuck squirters on disassembly, yet nothing bad happened? Is the issue accelerated wear? Detonation? Faster wear on the rod short end bushing? All of the above?
Thanks!
Bo