Would it be o.k. to have the return fuel go back to a T piece behind the fuel pump or do i need to take back to the tank ????

Not sure but my plan is to take the return to a T piece in the filler pipe

I'm no expert here, so please feel free to listen to a real expert. I've never tried this, but did think about something similar in the pub once.

I think it will not work as expected, but I'm not quite sure. It just sounds a bit wrong for some reason, I know effectively a return is just putting fuel you don't need back into the tank, therefore putting it back into the fuel line doesnt seem any different however.

How will you prime the pump? As it will simply suck in the air it is pushing out the otherside no?

Also, if you suck in air at any time, it will just keep going around in circles until it goes into the engine, normally it would go back into the tank, rise to the top and the intake would suck in fuel.

This had a problem with carbs due to the ability to sick air into the top of the float chanmber but with injection it should eventually all go out the injectors, i will be priming the system as much as i can.

the other resaon for it to go back to the tank was to do with fresh cool fuel being delivered.

Its going to be hard to get rid of air bubbles, since they're always going to circulate through the system.

NO dont do it, back to tank via another way

As the other guys say. the fuel also heats up as well and as it expands the engine runs weaker.

Back to the tank or to a swirl pot.

O.K.

will return to the tank


Cheers all

Yes, best to go back to the tank. That way would won't get the fuel heating up.

That's not to say that people don't do the system you describe without running into problems.... but it's not best practice....

I've even seen people fit the return to a engine-bay mounted swirl pot and do it that way without problems....

.... but I wouldn't....

As said, industry standard norm is to return to the tank. Couple of reasons, it helps to keep the fuel temperature down so that the engine get a or stands a better chance of getting a more efficient burn and hence better power output.
It also helps to expunge any air bubble/air locks out of the system, therefore providing a mopre reliable fuel delivery system.

^^^ wot they say. back to tank would ensurethere are no air locks - after a run with engine turned off, the het under the bonnet may vaporise the fuel in the lines so you have vapor in the loop; not good.