.boB

I need to connect this to a Corvette fuel filter/pressure regulator. Does anyone have a parts list for the AN adapters? The Miata end is 5/16", and the GM end is 3/8".

For the 5/16" return line, I'll probably just use rubber hose and clamps, since it's a low pressure connection. The seem to work well from the factory, no need to re-engineer that.

Can I cut off the bubble end of the steel tubing and use this?



http://www.summitracing.com/parts/ear-165056erl

What about these for the fuel filter end?


http://www.summitracing.com/parts/rus-640850

SupaDupaSteve

here's what I've seen used for the fuel rail connection. I can't see why it wouldn't work on the filter? I can't remember where but I read about someone using the fitting with the plastic clip like that one you've got pictured and it leaked.
LS1/LT1 EFI Fuel Line Fitting, -6 AN Male to 3/8 Inch Female, Black - Speedway Motors, America's Oldest Speed Shop

ItsAllRigged

I just did this but used 3/8 hard line. The fittings are the same though to connect to the pump and filter. They make two different types of push-on "oem" style fittings, one has a plastic insert piece like you mentioned. The other type is all aluminum design which is the preferred piece. They make them in 5/16 and 3/8 so you dont have to cut the nipple off the end of anything.

LS1/LT1 EFI Fuel Line Fitting, -6 AN Male to 3/8 Inch Female, Black - Speedway Motors, America's Oldest Speed Shop

Theres also a push on fitting for the vette fuel filter for the return line. Someone online sells the filter and that fitting together as a kit.

Check out my build thread for some pics

Casey

I used those (or something very similar) on the sending unit:

.boB

Perfect! Those are exactly the parts I was looking for. Thanx a bunch. Time to place another order!

.boB

OK, so change of plans. My original plan was to use 10mm nylon fuel line, just like the factory does. But, as you can see, they won't connect at the fuel tank.

So, then I was going to use AN lines between the fuel pump and filter/regulator. Thanx for the part information, BTW.

It seems like the Earl's compression fitting is pretty popular with both the Miata and GM crowd. But, if you read the specs for that fitting, it's for aluminum tubing only, and only rated for 50 psi. I know a lot of people are using it with good success. But not good enough to keep my OCD happy.

So, after a bunch of research, here's my plan. I ordered a pair of Yor-Lok reducer fittings, 3/8" to 5/16", and I have a Dorman's double bead fuel line. I'll use those parts to convert the standard Miata outlets to standard 3/8" GM quick disconnect outlet. Then I can use the nylon lines and fittings that I already own. And future maintenance and repairs will be simple.

Sounds like a good theory, anyway. We'll see how it pans out.

SupaDupaSteve

Ah. I'd like to see pictures and such to see how it comes out.

.boB

Been pretty busy lately. And I had to order a couple of fittings. But I finally finished assembly.

The goal here is simple, reliable, inexpensive, and light weight. The factory did an excellent job of designing tha basic parts, and I see no need to re-invent the wheel (again).

To make the connections at the fuel tank, I used Yor-Lok fittings. Pretty much the same thing as Swag-Lok, but easier to get. I got these from McMaster-Carr for a few bux. They are 5/16" x 3/8". They can be used on pretty much any metal tubing, they're SS, and are rated at 2,000 psi.



Then I quickly made some stock style nylon lines to connect to the filter/regulator.



And then hooked the fuel pump to the regulator, which is bolted through an existing hole in the tank flange. I don;t like them flopping around, so I'll make some kind of aluminum bracket to protect them.

.boB

The main connection was pretty easy, too. I used the same Dormans steel line with proper end connectors, and bent it to shape. I fabbed a small bracket to support the tubing at the other end.




And then just plugged in the main fuel line. Easy as pie, piece of cake.


Mounting the fuel tank to the chassis was supposedly a simple bolt in affair. Close your eyes, click your heels together, and repeat after me, "There's no such thing as bolt on."

It should drop in to place. But the tank sump hits the top of the rear sub frame. The guys at FM warned me about that. So I made the stand offs from stuff I had lying around.


And so I'm done with the fuel system!

I installed the engine last week end. So I need to install the trans mount, and get started on the suspension.

tbone heller

I like your hose press. That looks almost like the one that I obtained from the Lincoln/Mercury dealer I used to work at.

.boB

It was cheap, since I already owned everything. And it worked quite well.