johnnyjaws

on a 70 cutlass s 350 on the fuel pump does it have a 2 outlet or 3 theres a auto parts store buy me closeing after 50yrs and everything is 50% off that's in stock. he asked me if it had a 2 hose or 3 on it I didn't know because I haven't taken delivery yet any one know

tru-blue 442

If an a/c car 2 lines I beleive.
If no a/c 1 line.

rcorrigan5

I'm not 100% sure on this but I believe the 3-"outlet" fuel pumps were for the higher compression engines (I believe with 4-bbl carbs) whereas the 2-"outlet" fuel pumps were for the lower compression engines.

On the 3-"outlet" fuel pumps, one is the feed line from the gas tank, one is the fuel outlet to the fuel pump, and one is the outlet return line to the gas tank.

The 2-"outlet" pumps have a feed line from the tank to the pump and the an outlet to the carb.

That might not be true for all applications (for instance, a '68 4-4-2 turnpike cruiser?) but it might apply in a general sense.

Randy C.

MDchanic

Why not ask the seller to look?

- Eric

billmerbach

This may be dumb but does it matter the number of outlets? Cause can't you always run a filter with a returnine if needed?

MDchanic

No, not really.

But you can plug the return.

- Eric

joe_padavano

All you have to do is look under the hood and count the number of rubber lines from the frame to the pump. Fuel return was used mainly on cars with high underhood temps - A/C and high performance models.

hilbily

My fuel pump has two 3/8" fittings, one from tank,the other to carb. Also one 1/4"fitting. I assume this is return to tank. Can it just be plugged, what are the chances that the fuel tank has a 1/4" fitting to accept this line? Does returning the excess fuel to tank worth it?

Octania

My fuel pump has two 3/8" fittings, one from tank,the other to carb. Also one 1/4"fitting. I assume this is return to tank.
===================
correct


Can it just be plugged,
==============
yessir

what are the chances that the fuel tank has a 1/4" fitting to accept this line?
================
Slim to none unless you see a steel line for it on the frame.
Of course you can buy the proper sending unit with the line... and drop the tank...


Does returning the excess fuel to tank worth it
===========
Clearly, no, unless yo have AC or otherwise require that feature.

joe_padavano

To clarify, the fuel return is not intended to return excess fuel to the tank. Any mechanical pump will simply not pump once the float bowl is full. The purpose of fuel return is to recirculate hot fuel from underhood back into the tank to cool. This will help prevent percolation and vapor lock, which is even more common with the cat **** that passes for gasoline today. This is why Olds used fuel return on cars that were likely to have higher underhood temps, namely A/C cars and high performance cars (well that, and apparently to generate an endless list of questions about fuel return in future online forums...). If your car is currently plumbed for fuel return, there is no reason not to keep it - it will only help drivability. If it isn't, then yes you can simply plug the return port on the pump.