Sending unit swap for EFI

[68monaco]

Good morning fellow C body people. I am going to put the Sniper Fuel injection on my Monaco. When I did this to my 66 Polara I had to drill a hole in the tank for the return line. I'm trying not to do that this time by seeing if anyone on here has any information on a 3/8 supply sending unit with the built in return. I see those were available but I think just in the A and B bodies. Would they fit?

 

[3C's & a D?]

FI pump in tank

 

[MONC440]

I’m running fuel injection on the V10 and I got my 3/8 sending unit from these guys. It is also all stainless steel so that’s a plus. I’m using the b-body sending unit and using the vent tube in the unit as the return.

eClassics 1967-1973 Plymouth Fury Fuel Sending Unit 3/8" Stainless Steel

eClassics 1968-1970 Plymouth Satellite Fuel Sending Unit 1/2" With Return Stainless Steel

 

[Jengel451]

Sniper 1 or 2? If it's the 2 you can dead head the fuel line. Use a b body holley pump/sending unit.

 

[carrman]

I’m running fuel injection on the V10 and I got my 3/8 sending unit from these guys. It is also all stainless steel so that’s a plus. I’m using the b-body sending unit and using the vent tube in the unit as the return.

eClassics 1967-1973 Plymouth Fury Fuel Sending Unit 3/8" Stainless Steel

eClassics 1968-1970 Plymouth Satellite Fuel Sending Unit 1/2" With Return Stainless Steel

How accurate is your fuel gauge now you're using the B body sender?

 

[MONC440]

How accurate is your fuel gauge now you're using the B body sender?

LOL they are supposed to be the same resistance in the sending unit. I did ohm check mine when I got it and it was correct.

That being said I have an aftermarket autometer fuel gauge that was packaged as a Mopar gauge but it reads low. When the tank is full is shows 1/2. I have not checked the resistance to the gauge yet to see if it is getting the correct resistance. I used the original wiring and ground so that might be causing it. If the resistance is correct from the tank to the gauge, I will be ordering a new gauge. I have been told the aftermarket gauges have been off as of late.

 

[Jengel451]

How accurate is your fuel gauge now you're using the B body sender?

"IF" you tweak the float arm enough, the Sender/Gauge will be dead nuts on. I had to go back in and tweak it once after initial install to get it right.

 

[carrman]

"IF" you tweak the float arm enough, the Sender/Gauge will be dead nuts on. I had to go back in and tweak it once after initial install to get it right.

Does the tank have to come down to replace the sender? I'm trying to figure out a fuel return without punching a hole in the tank.

 

[Jengel451]

Does the tank have to come down to replace the sender? I'm trying to figure out a fuel return without punching a hole in the tank.

not for the sender. if you MUST have a return line you'll be dropping the tank to put one in. I dead headed mine with zero issues.

 

[MONC440]

Does the tank have to come down to replace the sender? I'm trying to figure out a fuel return without punching a hole in the tank.

If you use the 1/2 inch sending unit I linked up at the top it has a line for return.

 

[Jengel451]

If you use the 1/2 inch sending unit I linked up at the top it has a line for return.

Ah. Without the pump. That would totally work without dropping the tank.