Return vs. return less fuel rail

[65standard]

My 6.0 has the old style fuel rail with the return line. Is it better to use the returnless fuel rail and corvette filter/regulator or my original setup. I have access to the later style if needed.

I just finished up my frame and I ready to start my LSx swap.

I got my new spectra GM11C gas tank and it doesn't have the baffle. It is the same as my original tank (GM11B). So I'm a lilttle bummed out.

[mongocanfly]

I capped my return line on the fuel rail of my 6.0 and am running the vette filter/reg..no issues and works great.

[65standard]

What did you do with the vacuum diaphragm and vacuum line?

[Robznob11]

If it's in place go return. Less wear on pump bullheading less heating the fuel. Better down the road if you want more hp. All big fuel systems use a return.

[65standard]

Originally Posted by Robznob11

If it's in place go return. Less wear on pump bullheading less heating the fuel. Better down the road if you want more hp. All big fuel systems use a return.

It would be easier just to stay with the return system I have and just use a fuel filter designed for it.

[Robznob11]

Originally Posted by 65standard

It would be easier just to stay with the return system I have and just use a fuel filter designed for it.

And better for the system,parts and performance

[foamypirate]

Originally Posted by 65standard

I got my new spectra GM11C gas tank and it doesn't have the baffle. It is the same as my original tank (GM11B). So I'm a lilttle bummed out.

It was probably boxed incorrectly. The GM11C and GM1C should definitely have baffles in them. I would return and ask for a new one.

Here are mine that I recently ordered, showing the baffle.

[65standard]

Originally Posted by foamypirate

It was probably boxed incorrectly. The GM11C and GM1C should definitely have baffles in them. I would return and ask for a new one....

That is what I was thinking too. The new tank isn't stamped with the part number like my GM11B tank is. It only gas a small sticker on it with GM11A on it. Have no idea what GM11A tank is for.

[foamypirate]

Originally Posted by 65standard

That is what I was thinking too. The new tank isn't stamped with the part number like my GM11B tank is. It only gas a small sticker on it with GM11A on it. Have no idea what GM11A tank is for.

I looked it up, it's an 80' and earlier Squarebody tank, looks to have a smaller filler neck.

[ls1nova71]

I would use the return if you have it. A $10 fuel filter is way better when it comes time to change it than a $60 filter that can have a bad regulator straight out of the box. Also vacuum referenced fuel pressure versus a set pressure, so you have to tune for it. I'll never understand peoples infatuation with the returnless rail.....

[Hart_Rod]

Originally Posted by ls1nova71

I would use the return if you have it. A $10 fuel filter is way better when it comes time to change it than a $60 filter that can have a bad regulator straight out of the box. Also vacuum referenced fuel pressure versus a set pressure, so you have to tune for it. I'll never understand peoples infatuation with the returnless rail.....

It's easy..............................................!

[foamypirate]

Originally Posted by ls1nova71

I would use the return if you have it. A $10 fuel filter is way better when it comes time to change it than a $60 filter that can have a bad regulator straight out of the box. Also vacuum referenced fuel pressure versus a set pressure, so you have to tune for it. I'll never understand peoples infatuation with the returnless rail.....

I used it because that's how my LQ9 came. $60 is way too much to pay for the filter, I got mine for $30, WIX brand.

[65standard]

For the record, my replacement GM11C gas tank came in today. This one has the pan inside the tank and the correct 1 5/8" filler neck.

[foamypirate]

Originally Posted by 65standard

For the record, my replacement GM11C gas tank came in today. This one has the pan inside the tank and the correct 1 5/8" filler neck.

Right on!