dry start conundrum
06-13-2007, 06:25 AM
#16
my car is parked on my driveway but is at a slight angle up and to the left so the front is higher than the back...would there be any issues here with oil and starting? I drive it atm only about once every week.
thanks
Lee
thanks
Lee
06-13-2007, 09:56 AM
#17
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Shouldn't be an issue, Lee. At initial start (before the oil pressure is up) the engine is lubricated by oil left on the bearings. After a couple cranks the pump starts feeding the bearings. The oil pressure pump is fed out of the oil tank regardless of attitude so how you park won't affect this.
That's one of the benefits of a dry sump, in fact - the car can be doing all sorts of high-G maneuvers and the oil can't slosh away from the pump intake like it can in a conventional wet sump.
That's one of the benefits of a dry sump, in fact - the car can be doing all sorts of high-G maneuvers and the oil can't slosh away from the pump intake like it can in a conventional wet sump.
06-14-2007, 09:46 AM
#18
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I'd like to hear additional thoughts re Mike's dry start technique. Do most listers perform a similar ritual after starting a car that has sat for several weeks? How much actual benefit does a DME-less start give? It seems very simple. Is it as effective as advertised?
Jack
Jack
06-14-2007, 11:21 AM
#19
Race Director
honestly, I think you guys are wasting your time doing this. The infintesimal wear that is occuring on a dry start is pretty academic considering most people don't keep cars past 150k miles. Even at that point, the bearings should still be in good shape.
I wouldn't worry about it, at all.
I wouldn't worry about it, at all.
06-16-2007, 09:57 AM
#20
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Interesting point. However, although I've only got 30 K miles on the odo I'm planning (currently) on keeping both cars indefinitely. What about if we plan on keeping the cars past 150 K ??
Any other thoughts?
Thanks
Jack
Any other thoughts?
Thanks
Jack
06-16-2007, 10:23 AM
#21
Race Director
I wouldn't worry about it.
With the dry sump eliminating just about any chance of oil starvation under load, I would not be at all concerned with the tiny bit of start up bearing wear.
With the dry sump eliminating just about any chance of oil starvation under load, I would not be at all concerned with the tiny bit of start up bearing wear.
06-16-2007, 03:57 PM
#23
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Jack,
Im ashamed to say that Im not a 993 owner (or even a porsche for that matter). But my experience with many different engines is that as long as you use a good synthetic oil with regular changes, you keep the oil at the appropriate level, and you wait until the car is warm before you get on it, bearings will be the least of your concerns.
Im ashamed to say that Im not a 993 owner (or even a porsche for that matter). But my experience with many different engines is that as long as you use a good synthetic oil with regular changes, you keep the oil at the appropriate level, and you wait until the car is warm before you get on it, bearings will be the least of your concerns.
06-16-2007, 04:20 PM
#24
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Originally Posted by Peter R.
IMO dry or wet sumps do not make a difference when running dry bearings is concerned. T
Granted, those are big 1-gagillion CC engines with more pistons than most starting grids but.. it was something I'd never seen done before. Not that I'm worried about it but.. what some sort of pre-oiling high-pressure pump be of any value, to combat dry-start damage?
