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Fuel pressure, Fuel GPH 7.3 Idi
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Anyone have any idea what the fuel flow rate should be on a 1994 idi 7.3... Need to choose a secondary fuel pump and filter for svo. What GPH should I look for? Should the Fuel filter be rated for the same GPH as the pump?

Doug
7.3 soon to run svo
 
Registered: February 25, 2008Reply With QuoteReport This Post
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quote:
Anyone have any idea what the fuel flow rate should be on a 1994 idi 7.3


hi, i have a 91 with a 7.3 IDI did you ever get your answer?


80's NA VWs & NA and turbo Benzes, '91 E350 7.3 IDI NA
various bicycles with trailers and gearing low enough to ride up a cliff ;-)
 
Location: Pacific Southwest, USA | Registered: April 28, 2006Reply With QuoteReport This Post
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I never did get a response, however I have checked out what other pumps people are using and it seems that 50 GPH is doable. I am sorry to have such un-technical advise.


Doug
 
Registered: February 25, 2008Reply With QuoteReport This Post
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I use a Holley red pump with no trouble at all on my single tank blend setup. I've found a lot of guys over at www.thedieselstop.com have switched to the holley pumps, even those running straight diesel. I don't know the GPH but I can tell you that it never starves for fuel as indicated by my vacuum/pressure gauge.


1986 F350 Crew Cab 2wd SRW, Granny low T-19, 6.9 diesel. Banks sidewinder turbo and chopped Peterbilt 8" stack coming soon. Also waiting on my Advance Adapters Ranger III overdrive unit. Running various WMO blends.
 
Location: Akron, Ohio | Registered: July 19, 2008Reply With QuoteReport This Post
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According to this Electric Fuel Pump Discussion, the stock '93 mechanical fuel pump (should be the same 89-94) is:

Maximum Free Flow Rate (gph): 30
Maximum Pressure Range (psi): 5.75
Minimum Free Flow Rate (gph): 30
Minimum Pressure Range (psi): 4.5
 
Location: Milwaukee, WI | Registered: July 22, 2008Reply With QuoteReport This Post
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Well I have since switched to a replacement pump for a Hummer H1 after having trouble with the Holley pumps. One was old and it just wore out, I got a second one as a quick fix and it lasted 3 months on heavy WVO blends. I put the Hummer pump in there and it's been working great. I needed some special fittings to plumb it in though. I like it because it's originally a diesel lift pump.


1986 F350 Crew Cab 2wd SRW, Granny low T-19, 6.9 diesel. Banks sidewinder turbo and chopped Peterbilt 8" stack coming soon. Also waiting on my Advance Adapters Ranger III overdrive unit. Running various WMO blends.
 
Location: Akron, Ohio | Registered: July 19, 2008Reply With QuoteReport This Post



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Always monitor IP inlet pressure and never let it go below 4 psi . Starving a Stanadyne DB2 IP will kill it fast . The best electric lift pumps for WVO so far are the FASS and Raptor models.


1994 F250 IDI 7.3 NA E4OD

Remember that the forum search/"find" feature does not include the archives . Search the forum archives here-

http://www.biodieseldiscussion.com/forums/search.php
 
Registered: November 08, 2004Reply With QuoteReport This Post
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I know this thread is a little old but I really need some help converting my 94 ford f350 7.3 idi N/A


My ford from the tank to the injectors is as follows: Coolant heated fuel pick-up > TIH coolant heated fuel line > 12v heated fuel sedimenter > 12v heated fuel filter > Coolant Heat exchanger > Supply valve (removed origonal 6 port and replaced with two 3-way [one for supply, one for return], also allowing me to reduce purge times by moving switchover closer to lift pump), from the return valve I am looping the veggie line back into the supply before the filter). Also i've added a pressure guage and temp sensor in the supply line as well as a temp sensor on the coolant line. to help with when to switch over and when purging is complete. I have dual tanks in the ford so I created a whole new fuel system from the veggie, leaving the stock filter only for diesel.

Upon starting the actual conversion and reading your posts, I realized I was not going to be able to reroute the stock filter and utilize the stock lift pump.

I have decided to leave the stock system alone and install a fass 95 gph fuel pump to pull the veggie. My question is can I mount this pump under the hood? or will i need to mount on the rail? As i know it is hard for a pump to pull vs. push fuel. My fuel filter has a priming pump on it that cant be mounted on the pressure side. So if i mount the pump on the rail by the tank I will need to mount the sedimentor and filter back there too.

Also I will need to add a 3rd valve to port the return fuel from the stock lift pump to the return line so i do not deadhead the lift pump or blow out an o-ring in the stock filter, when i switch on the fass fuel pump and switch the supply valve to veg.

Any thoughts / comments / suggestions?


Lastly, can I utilitze the stock switch in your truck (Im assuming you had dual tanks) I would like to do so for the supply valve so that I can still utilize the dash fuel gauge sending units in each tank, which are linked to the stock switch. Then adding a second switch for the return valve.

Thanks so much! I've been working on this design for like 6 months and am so close! Then i encountered to stock filter lift pump issue...
Any help would be great!!!
 
Registered: October 31, 2011Reply With QuoteReport This Post
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