To: | <ddahlgren@snet.net>, "Glenn Ridlen" <gridlen@yahoo.com> |
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Subject: | RE: Dry sump |
From: | "Russel Mack" <rtmack@concentric.net> |
Date: | Sun, 26 Jan 2003 20:50:10 -0600 |
O.K. Dave... got any numbers for the required flowrates? What I'm getting at is, I think most of us may be running a lot more than we really NEED. This is a SPRINT. A NASCAR qualifying lap. We should be able to go almost to NHRA extremes. George Bryce only runs only "...one and a half quarts of less than 0-weight synthetic oil" in Angelle Savoie's 305hp dragster. And don't forget what Grib said about the NASCAR guys turning down the pump pressure (and thus the flowrate) for qualifying. So what flowrates do our various engines need-- at what speeds-- and why? Can we reduce that flow demand by cooling the oil better? What is the optimum delta Temp? Russ, #1226B -----Original Message----- From: Dave Dahlgren [mailto:ddahlgren@snet.net] Sent: Sunday, January 26, 2003 5:37 AM To: Glenn Ridlen Cc: DrMayf; Russel Mack; rgribble; land-speed@autox.team.net Subject: Re: Dry sump Just carries heat off the bearings ??? Yikes Batman I thought that was what we were trying to do..In order to run the correct pressure you need the correct amount of flow in gallons per minute. The flow is controlled by the bearing clearances vs. pump size and drive speed. The pressure is controlled by the pump bypass. The only way to reduce flow is to either make the pressure less or tighten clearances. This seems simple at first and in a perfect world easy to do. just make them 1/2 what they were and reduce the flow by 50%.. Unfortunately parts distort under load and rod housing bores are not round anymore. Bearings are made eccentric for this reason. as far as the cooling goes how long do you think your engine will run if low on water or very low on oil at 8000 rpm?? Dave Glenn Ridlen wrote: > > Mayf > Don't think I would put a fuse in that circuit but......think about it.....volume only needs to be enough to lubricate at max RPM....any more just carries heat off the bearings...hmmmmm...wonder how much 12v dc (or 24v) power req'd. > Glenn /// unsubscribe/change address requests to majordomo@autox.team.net or try /// http://www.team.net/mailman/listinfo /// Archives at http://www.team.net/archive/land-speed /// what is needed. It isn't that difficult, folks. |
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