dropzone
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« on: July 06, 2009, 08:29:42 AM » |
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OK guys and gals Ive been thinking about something for the past couple of weeks. It has to do with oiling a Briggs opposed. The Briggs uses vacuum from the engine to operate the fuel pump. A golf cart uses the same type of fuel system except it uses a external fuel pump, my thought is to use the same fuel pump the golfcart uses except it will be pumping oil to the top of the engine. I'm gonna Tee off the oil drain with a hard line to the fuel pump then to the top of the engine where it will drain off over the cam and down on to the crank and rods. For the vacuum source to operate the pump I'll just tee off the existing vacuum line that operates the fuel pump. Have any of you tried this? Like I said its just in the thought process as of now. I'm using a horizontal block also.
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Chris
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« Reply #1 on: July 06, 2009, 12:46:37 PM » |
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Are you having oiling problems?
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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dropzone
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« Reply #2 on: July 06, 2009, 03:20:27 PM » |
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Not that I know of now, but I had to rebuild it not long after I put it in my cart. After I removed the Governor it started knocking. It basically spun a rod bearing. Yes I know they dint actually have rod bearings. But you get the point. I did some investigation at (haymow) and found out that the rod on the flywheel side had the oil hole turned the wrong way from OEM. The repair manual says to install the rod on the PTO side with the oil hole facing the cam and rod flywheel side with oil hole facing away from the cam. Well that might be OK for a bone stock engine with the governor. This all got me to thinking (which by the way can be dangerous) about the oiling on the horizontal engine it only has a slinger bolted to the bottom of the rod on the PTO side. It just seamed to me that there should be a better way to get oil to the crank and rods. I'm sure the crank shaft weights sling oil also but if oil was being shot down on the cam and crank it would help the engine live longer.The oil would also be getting cooled helping to cool the engine in the process and that would help the engine live longer too. I'm just trying to prevent another rod failure.
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Kaptain krunch
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« Reply #3 on: July 06, 2009, 03:28:49 PM » |
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I dont know how well those external diaphragm fuel pumps (if thats the kind your thinking of) would work with oil. They have thin plastic internals, that with hot oil might melt. personally i would leave the engine, but thats just me.
EDIT;
I was just thinking, and what about an oil injection pump from a snowmobile? i have one from a triple, so if you combine all three hoses to one, it would flow an ok amount of oil.
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Chris
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« Reply #4 on: July 06, 2009, 06:19:42 PM » |
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I see what your saying. So I guess it's safe to assume it's not a "pressure lube" system, just the slinger.
I agree with Krunch, not sure what kinda pump would hold up to extremely hot oil, also wouldn't be a bad idea to ad a filter - but then you need a pump capable of pulling the oil through the filter....
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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dropzone
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« Reply #5 on: July 06, 2009, 07:24:27 PM » |
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No its not a pressure lube. The pump I have is cast alum case and the diaphragm inside the pump is rubber with steel springs. But your right the pump may not hold up to the heat. I thought about that and I'm thinking if I install a oil cooler before the pump It may cool the oil enough that it may work it wouldn't need to be a big cooler. Ive seen them in pickup trucks there a small power steering cooler. Your right about the filter I think a automotive style filter relocator would work. Briggs made an opposed I think that had a filter and it wasn't a pressure lube system It just circulated the oil Thur the filter. Ive also thought about using a 12 volt fuel pump but it may run the battery down faster than the Briggs alt can charge. Like I said its just an idea rolling around in the space between my ears.
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Kaptain krunch
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« Reply #6 on: July 06, 2009, 07:32:51 PM » |
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Sounds like way more effort than its worth, i would just find a sled or bike engine.
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dropzone
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« Reply #7 on: July 06, 2009, 09:50:44 PM » |
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Normaly that is what I would do but money is kinda tight. I already have the stuff to do it except for the cooler and I can get one of them for cheep at a junk yard. I wnat to keep this thing going as long as I can. Anyway I enjoy tinkering with this kinda stuff.
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Chris
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« Reply #8 on: July 07, 2009, 07:49:00 AM » |
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Briggs made an opposed I think that had a filter and it wasn't a pressure lube system It just circulated the oil Thur the filter.
That's why I put pressure lube in quotes  |
Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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dropzone
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« Reply #9 on: July 07, 2009, 06:08:14 PM » |
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Thanks guys I did some research and ask some questions at a golf cart sight and they say the fuel pump off a golf cart wont move the oil. Oh well I'm gonna leave it the way it is. Ive got another complete 18 hp opposed for a back up. I'm gonna be looking thou for a pressure lube latter on when the funds are available
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