260DET Posted February 26, 2007 Share Posted February 26, 2007 Thinking about using one of these engine oil accumulators on the project car's VG30DET engine. Have fitted a (better) DETT oil pickup and sump and done a couple of little mods to the sump itself but am still concerned that the engine may momentarily drop oil pressure on the race track. An accumulator will also add a bit more oil capacity too. See details here http://store.summitracing.com/egnsearch.asp?N=400105+300033+115&autoview=sku So what is the experience with these, the cheapest one seems OK for what I need. Do they make a difference in actual use? Quote Link to comment Share on other sites More sharing options...
jt1 Posted February 26, 2007 Share Posted February 26, 2007 Quite a few people around here use them in track cars. They seem to be a good intermediate step between a wet sump and a dry sump. Canton is another popular brand, but I've only heard good things about the Moroso. John Quote Link to comment Share on other sites More sharing options...
260DET Posted February 27, 2007 Author Share Posted February 27, 2007 Thanks John, think the 1 quart Accusump model will suit my application, see here http://www.cantonracingproducts.com/accusump_purchase/accusumps.html But to work immediately it seems it should be plumbed into the block oil gallery after the filter, otherwise there is nothing stopping the released oil from running back towards the oil pump. Quote Link to comment Share on other sites More sharing options...
jt1 Posted February 27, 2007 Share Posted February 27, 2007 I think the best install is to plumb the accusump into the oil cooler lines, and use a check valve so there isn't any backflow. Some of the sandwich plates may have a checkvalve, but I'm not familiar with them. As the engine comes up to temp, always cycle the accusump a couple of times to get hot oil in it. John Quote Link to comment Share on other sites More sharing options...
260DET Posted March 1, 2007 Author Share Posted March 1, 2007 One concern, when idling the (turbo) engine down prior to switching off, won't the accumulated oil go back into the system due to the usual relatively low oil pressure of a hot idling engine? If the accumulator is run at a low release pressure to combat that then its effectiveness will suffer should a momentary pressure drop occur on the track. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 1, 2007 Share Posted March 1, 2007 The accumulator has a valve on it. You rev it up, then close the valve. That locks in the oil at high pressure. Then before you start the next time you open the valve, that sends oil into the system before you ever turn the key. I don't have one by the way, but I'm tempted to buy one... Quote Link to comment Share on other sites More sharing options...
260DET Posted March 1, 2007 Author Share Posted March 1, 2007 Manually controlled valve eh Jon, rather than an ignition controlled one. Quote Link to comment Share on other sites More sharing options...
jt1 Posted March 1, 2007 Share Posted March 1, 2007 When the accumulator releases the oil is determined by how much air pressure you put in it, the valve is to store some oil at higher pressure to prelube at startup if you desire. At least in my experience, the release pressure will be below idle engine oil pressure. For instance, let's say the engine has 60psi hot at high rpm, and 30 psi at hot idle. You would probably put 25psi in the empty accumulator, and it would keep your oil psi no less than 25psi as long as the reserve held out. The min pressure is when the accumulator is empty, it builds up to whatever the engine pressure is when full. John Quote Link to comment Share on other sites More sharing options...
260DET Posted March 2, 2007 Author Share Posted March 2, 2007 Good, better get one then. Quote Link to comment Share on other sites More sharing options...
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