Tom;
Great post, parallels our experience exactly, including the contamination
problem. Our rule of thumb has always been 10 lbs. of pressure for each 1000
rpm.
Jim in Palmdale
----- Original Message -----
From: Thomas E. Bryant <saltracer@awwwsome.com>
To: Keith Turk <kturk@ala.net>; Land Speed <land-speed@autox.team.net>
Sent: Friday, April 07, 2000 8:57 AM
Subject: Re:Oiling!
> Keith,
>
> Sorry I haven't jumped in sooner with my views on your oiling problems,
> but I have been busy trying to get my computer to be more useful in my
> life. It is a business and pleasure unit that is getting too full to
> function well. After several attempts at restoring the programs,
> updating, etc., I finally went out yesterday and bought a 10.2 GB hard
> drive to add to the 2.1 GB. Now maybe I can do all the things I want
> without be concerned with overload. I guess you might say that I am
> "hopping it up", they assured me that it would also be faster.
>
> Since this might be of interest to others, I have responded to the group
> as well. Over the years I have used several configurations to meet my
> oiling needs. I can tell you some things that haven't worked! I
> originally ran a Desoto V-8, normal oil pressure was in the 60 lb range.
> We boosted the pressure by adding shims behind the relief valve in the
> pump. Of course through experiment, I found that a gear pump will put
> out lots of pressure without adequate maximum pressure control, too much
> pressure can be harmful to the engine just as too little pressure can.
> After a while we settled for 100 lbs. as a good number. All of this was
> done with a stock oil pan and really not oil pressure problems.
>
> When we switched to the Chevrolet engine, it was really difficult to get
> accustomed to oil pressure needs. After a few filter failures, we
> settled for 60 lbs of pressure with good success. The Chevy system moves
> a lot of oil at the lower pressures. This of course requires can present
> problems of oil return to the pan on long runs. I'm sure that you have
> restricted the upper oiling, adequate engine breathing is also a must to
> let the oil return to the sump. We have evolved from a stock pan, to a
> six quart pan, to a custom 8 quart pan with kickouts on the sump, to our
> present dry sump.
>
> The dry sump is the best way to go, but the 8 quart pan worked fine for
> me. the reason for the dry sump was to get lower profile ground
> clearance. We use a teflon windage tray in our present setup and also
> had one in the 8 quart system. At one time we also had a crank wiper,
> but it is lots of work getting that setup prepared and I haven't
> bothered with this system.
>
> We use a 20/50 oil, although we don't have one, I think that an oil
> heater is a good idea. I have run for several years without a dipstick,
> but I'm not sure how I feel about this issue. With alky it is easy to
> get too much alcohol into the oil by running too rich. I was on the low
> side of the learning curve and didn't realize how quickly that could
> happen, so I spun a bearing due to not being able to monitor the oil.
> With the dry sump, I can look into the tank and keep on top of it that
> way. The need for the dipstick, in my estimation, is not to make sure
> that you have enough oil, but to make sure that it is not contaminated.
>
> In my opinion the things to watch are: If you are using a high volume
> pump, keep the oil pressure moderate. Be absolutely certain that no more
> oil than is needed is getting to the engine. Plug all oil returns to the
> pan except at the ends of the lifter galley. Use adequate venting of the
> crankcase, a vacuum system would be encouraged. A good windage tray is a
> must, making sure that the oil level is below that point. Use a good
> custom oil pump pickup with proper clearance from the bottom of the pan.
> That's my quarter's worth. Good Luck! BTW I'm a little jealous that you
> left coast guys are aready racing. Of course I'm not ready anyway.
>
> Tom, Redding CA - #216 D/CC
>
> Keith Turk wrote:
> >
> > I was kinda interested in Seeing your thoughts on Oiling Problems... and
> > what your running for an oiling system...
> >
> > K
>
|