How to adjust the fuel delivery on 7.8L turbo diesel?
#1
How to adjust the fuel delivery on 7.8L turbo diesel?
This is my first diesel. I read through my manual but I did not see any mention of adjusting the fuel volume.
Are the injectors on a 87 7.8L electronically or mechanically triggered?
Why? I want to investigate a propane/diesel blend. My understanding is that propane injected diesels work well and reduce cost.
From what I have read on the kits on the market is that the use a typical car type intake fogger and offset the reduced diesel fuel. Diesel is still required for the ignition and lubrication but reducing the volume to 30-50% and using propane to make up the difference.
I have converted my toyota camry, dodge ram 1500, 17hp riding mower, 12hp generator to run on propane since the cost is approximately 50% of the cost of gasoline. I also qualify for 50% state tax credit for conversion costs. I already have many extra propane parts, tanks, hoses, valves, etc that are not being put to good use.
Are the injectors on a 87 7.8L electronically or mechanically triggered?
Why? I want to investigate a propane/diesel blend. My understanding is that propane injected diesels work well and reduce cost.
From what I have read on the kits on the market is that the use a typical car type intake fogger and offset the reduced diesel fuel. Diesel is still required for the ignition and lubrication but reducing the volume to 30-50% and using propane to make up the difference.
I have converted my toyota camry, dodge ram 1500, 17hp riding mower, 12hp generator to run on propane since the cost is approximately 50% of the cost of gasoline. I also qualify for 50% state tax credit for conversion costs. I already have many extra propane parts, tanks, hoses, valves, etc that are not being put to good use.
#2
Not any electronics on Injectors in 87 on a 7.8L.
look at his page.
Low buck diesel power - Home
The person that has that page is memeber here nevrnufhp
look at his page.
Low buck diesel power - Home
The person that has that page is memeber here nevrnufhp
#3
Thanks for the info. So it appears that it is possible to reduce the injector pressure and offset diesel with LPG but the fuel adjustment is a manual process. With that being said, if you were on the road and run out of LPG, you cannot simply hit a button to return to 100% diesel. Starting to sound like a potential PITA. Typically this truck would never go outside of the range of the LPG capacity but that one time I do, I could have a long day on the side of the road.
#4
Thanks for the info. So it appears that it is possible to reduce the injector pressure and offset diesel with LPG but the fuel adjustment is a manual process. With that being said, if you were on the road and run out of LPG, you cannot simply hit a button to return to 100% diesel. Starting to sound like a potential PITA. Typically this truck would never go outside of the range of the LPG capacity but that one time I do, I could have a long day on the side of the road.
For cheaper pennies per mile I'd look into Waste Veg Oil or Waste Engine Oil as fuels before I'd go with propane.
#5
I'll throw another curve ball at you. on some injection pumps (I have no idea about the 7.8's pump)the fuel flowing though it is the ONLY thing that cools and lubes the pump.So if you cut back on the fuel volume you have just also cut its lube and coolant as well.
For cheaper pennies per mile I'd look into Waste Veg Oil or Waste Engine Oil as fuels before I'd go with propane.
For cheaper pennies per mile I'd look into Waste Veg Oil or Waste Engine Oil as fuels before I'd go with propane.
I have read where LPG runs more efficiently in a higher compression diesel vs a traditional gasoline car.
#6
I'll throw another curve ball at you. on some injection pumps (I have no idea about the 7.8's pump)the fuel flowing though it is the ONLY thing that cools and lubes the pump.So if you cut back on the fuel volume you have just also cut its lube and coolant as well.
For cheaper pennies per mile I'd look into Waste Veg Oil or Waste Engine Oil as fuels before I'd go with propane.
For cheaper pennies per mile I'd look into Waste Veg Oil or Waste Engine Oil as fuels before I'd go with propane.
Now that I thought about this.... if you reduce your pressure, would the pump not pump the same amount of fuel then return the excess to the tank? Thus having the same amount of fuel for cooling?
#7
At least That is the way I remember it being explained to me 15 years a go when I watched my 89's 7.3 injectors get tested.
Whether or not the return fuel line cools the pump would depend on the route it takes by or though the pump.
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#8
I should mentioned this. If I remember correctly mechanical injectors inject when the pressure reaches a preset amount. Yo turn the power up and down I believe you need to change the volume of fuel not the fuel pressure.
At least That is the way I remember it being explained to me 15 years a go when I watched my 89's 7.3 injectors get tested.
Whether or not the return fuel line cools the pump would depend on the route it takes by or though the pump.
At least That is the way I remember it being explained to me 15 years a go when I watched my 89's 7.3 injectors get tested.
Whether or not the return fuel line cools the pump would depend on the route it takes by or though the pump.
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