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  #1  
Old 02-14-2006, 12:26 PM
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how many gpm for a w123 diesel

I am converting an 85 w123 300td to run on WVO. I am pieceing together the parts myself rather than buying a kit. Right now I am looking for a fuel filter for the WVO. I need to know how many gph approxiamtely the fuel pump needs. I realize that the engine returns unused fuel to the tank so I would like to know the total gph that would go through the IP, not just how many gph the car might use.

Thanks

Peter


Last edited by Mistel; 02-14-2006 at 05:37 PM.
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  #2  
Old 02-14-2006, 12:40 PM
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I don't know, but I can SWAG with the best of 'em

Assume conservatively 15 MPG mileage rate. Assume fastest you ever go will be 80 MPH. That means in an hour you would consume 5.33 gallons. (not bloodly likely that this will happen, but anyway). Assume fuel recirc rate is 300%, i.e. you push 3X as much fuel as you use through the system. 3 x 5.33 GPH is 16 GPH. Or 0.2666 GPM. Pretty low flow rate by most filtration standards, even if you double it.

Rgds,
Chris W.
'95 E300D
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Old 02-14-2006, 12:44 PM
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Thanks Chris

That puts it in perspective. A lot of the filters I am looking at are 60 gph so that is tons. I could even use 30 gph with no problem
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Old 02-14-2006, 12:48 PM
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I, too, am converting to run WVO - 83 300SD. Also, I'm buying off the shelf parts, trying to see how inexpensively (but safely for the engine) it can be done. For fuel filters - I've been looking at Luberfiner (sp?), made by Champion Labs. They are at Ag stores, like Tractor Supply Co. They filter to I think 5 micron, not sure tho. Problem I see is 1" NPT in/out - tough to find adapters. They also have a plastic cannister that houses the replaceable filter - I'd rather have metal because I'd like to heat it with copper coils of coolant like Fred B does.

Ebay also has some 1 micron toliet paper filters.

Champion also makes Walmart SuperTech oil filters - thought to be much better than Fram. But I can't get a straight answer out of Champion for the micron filtration - they say "oh, 20 -30 microns".
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Old 02-14-2006, 12:50 PM
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Remember those flow ratings you see on filters are for diesel. You will never be able to push that much oil through unless it is extremely hot (like over the high temp rating of the filter-hot).

Also remember the bigger filter you have, the more capacity it has. That means the further you can drive before having to change it. For that reason, I always tell people get the biggest filter that will fit in the space you have. There usually isn't much difference in element price between the biggest filters and smallest filters, either. Just the initial price difference that gets you.
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Old 02-14-2006, 12:59 PM
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dougand3

Look on this site for a free file called "Simple coolant jacket filter heater"

vegoilconversions.netfirms.com

This is what I am going to use instead of copper

I was not allowed to post a link

Peter
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Old 02-14-2006, 01:01 PM
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I converted my 1989 MB 190D over to run WVO with a home made kit,being running for 40,000KM now,Also converted a school bus which has run about 80,000 miles.
You are worried about the wrong things.MB don't need a lift pump for WVO,but the lift pump and stock diesel filter have to be modified,you need a heated fuel filter,hose on hose or hose in hose set up a seperate heat exchanger and or electric heat to thin the WVO,,,,,HEAT to thin the WVO is the most important aspect to run WVO,,,,WVO must be minimum of 140 degrees to run properly,,,,160 to 180 degrees is better,so depending were you live on this earth,heating is the biggest factor.If you need more info. I can help you out,Sites to get info and various parts to use.But you must do your home work,or you can do damage to your car.
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Old 02-14-2006, 01:05 PM
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Two sites to get you going,,,greasecar ,frybrid,Dana's plan,he has a very cost effective way to make your own kit,Let me know if you need more help?Were do you live?
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Old 02-14-2006, 01:07 PM
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Sergio

Thanks for pointing that out. I understand that already but maybe some of the other people do not.

I will be using a coolant heated fuel pick-up, HOH, coolant heated fuel filter, flat plate heat exchanger then electrically heated injector line heaters from Fattywagons. $12!

I'm in Canada so it will be setup for cold weather, my second conversion, I have a truck with a snowplow that runs WVO.
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Old 02-14-2006, 01:24 PM
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Were in Canada,I live in TORONTO,
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Old 02-14-2006, 02:20 PM
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A simple copper HIH 3 feet long (18in x18in) prior to the filter made the flow much better in the cold. I am going to move my vo filter to the tank so I don't have a filter full of cold vo to heat in the engine comp.
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  #12  
Old 02-14-2006, 04:01 PM
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Quote:
Originally Posted by Mistel
Sergio

Thanks for pointing that out. I understand that already but maybe some of the other people do not.

I will be using a coolant heated fuel pick-up, HOH, coolant heated fuel filter, flat plate heat exchanger then electrically heated injector line heaters from Fattywagons. $12!

I'm in Canada so it will be setup for cold weather, my second conversion, I have a truck with a snowplow that runs WVO.
Sounds exactly like the conversion that I am finishing, but I am using HIH. I am using a filter/water seperator from an international truck in my conversion. Looks like a racor, but for about half the cost. It will take racor elements too.
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Old 02-14-2006, 04:54 PM
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Quote:
Originally Posted by bgkast
...I am using a filter/water seperator from an international truck in my conversion. Looks like a racor, but for about half the cost. It will take racor elements too.
It probably is a Racor, produced as an OEM part for International.
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Old 02-14-2006, 05:13 PM
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According to my OM603 engine manual the MINIMUM flow specification is 10oz per minute @ cranking speed (150 RPM). I think it is safe to assume that the pump would move at least 3-4 times that amount of fluid, and maybe more, when operated at higher RPM ranges.

At 5X the specification posted for cranking speed you would get 50 oz per minute which would be about a gallon every 2.5 minutes. This would be somthing like 24 GPH?

It would be an interesting experiment to perform.

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