76s30 Posted June 23, 2007 Share Posted June 23, 2007 ok it seems logical to me and I've seen a comparison done on the same engine with and with out and picked up 20 hp with the dry sump. but it was sbc and I believe they only took it to 6k. So just how much is a l6 lossing to windage at what rpm, wouldn't the L series crank have more conter weights slinging through the oil? Why I ask this, I have 3 stage barnes setup with a 1.5 gallon butler tank I got way cheap a few years back. I thought I might use it some day, well I still haven't now I'm tring to make excueses to use it. Any insite is much appreceated. Quote Link to comment Share on other sites More sharing options...
gjc5500 Posted June 23, 2007 Share Posted June 23, 2007 In theory it does. in reality, you wont get much more out of your car. It will wind up a little faster as wit5h knifeedging. Quote Link to comment Share on other sites More sharing options...
tannji Posted June 23, 2007 Share Posted June 23, 2007 It seems to me that while you should see gains, the same gains or better should be seen from a properly designed windage tray and crank-scraper. I am considering a dry sump as well... but am very interested to see what some of the more experienced members have to say, especially as to the necessity of combining scrapers and windage trays with the dry sump. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted June 23, 2007 Share Posted June 23, 2007 If I recall the gain from a crank scraper was small enough to be negligable. The true benefits to dry sumping a motor are not having to worry about losing oil pressure and being able to lower the motor in the chassis, in my opinion. Quote Link to comment Share on other sites More sharing options...
johnc Posted June 23, 2007 Share Posted June 23, 2007 In addition to what Jon mentioned above, you can position the oil tank anywhere in the chassis to improve weight distribution, significantly increase oil capacity (but that does increase weight), and run external oiling lines on the block to help ensure adequate pressure and volume at RPMs over 8,000. Its a little difficult to find a pan (ARE is the most common), the pumps interfere with alternator mounting, and (if 4 stage) the passenger side engine mount needs to be modified. Quote Link to comment Share on other sites More sharing options...
Guest david mckenzie Posted June 23, 2007 Share Posted June 23, 2007 ok it seems logical to me and I've seen a comparison done on the same engine with and with out and picked up 20 hp with the dry sump. but it was sbc and I believe they only took it to 6k. So just how much is a l6 lossing to windage at what rpm, wouldn't the L series crank have more conter weights slinging through the oil?Why I ask this, I have 3 stage barnes setup with a 1.5 gallon butler tank I got way cheap a few years back. I thought I might use it some day, well I still haven't now I'm tring to make excueses to use it. Any insite is much appreceated. The potential increase in horsepower is normally gained by the negative crankcase pressure created by the multiple scavenging stages in the dry sump pump. When you run negative crank case pressure, you may use lighter tension rings, this decreases paracidic drag created by the piston rings and increases horse power. There are also other benefits that are posted in the other threads. The one negative is your oil pump is now driven by a cog belt. Quote Link to comment Share on other sites More sharing options...
76s30 Posted June 24, 2007 Author Share Posted June 24, 2007 The potential increase in horsepower is normally gained by the negative crankcase pressure created by the multiple scavenging stages in the dry sump pump. When you run negative crank case pressure, you may use lighter tension rings, this decreases paracidic drag created by the piston rings and increases horse power. There are also other benefits that are posted in the other threads. The one negative is your oil pump is now driven by a cog belt. This I already knew we used to run vacum pumps though with a wet sump. the comparison was done on the same unopened engine. IT was on the Power block on spike I forget what show. but all they did was slap on the dry sump pan, pump and fed it back into the stock oil filter location. The engine was on a dyno, never removed and consectutive tests where done. They picked up 20 hp on the top end. Normally on a ford this would not be done the stock oil passages would be blocked and AN- lines run to the respective sub gallies; ie head had seperate lines running to it from the lower end, solid lifters were also utialized in our builds. Most high rpm ford builds involve some kind of oil restricter to limit flow to the head. But it was done on a 350 chevy which I know next to nothing about. Quote Link to comment Share on other sites More sharing options...
mtcookson Posted June 24, 2007 Share Posted June 24, 2007 I don't have anything to add but if you end up not wanting to use it I'll gladly buy it off of you. Need one for my VH45 project. Quote Link to comment Share on other sites More sharing options...
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