I know these connectors are out there but I can't seem to find them with summit.

What OD is the stock fuel return hardline?

 

The hard line IIRC is 9 or 10mm, there are no AN fittings I could find in that size. You have to get a compression fitting (brass or bronze?) from a hydraulic/fitting supply house with an AN adapter. IIRC the compression fitting went to German thread and then a German thread to AN adapter. Took a few phone calls and take a sample piece of line with you. I did it from my rear hard lines to -6AN for my cell but have not done the engine compartment yet. Another option is to have a bung brazed on the line or just replace all your hard line with something other than metric! A hose barb and piece of hose works but defeats the whole purpose if you are going to the trouble/expense of running braided line.

 

it's a 5/16 OD hard line... which I did find from summit

http://store.summitracing.com/partde...0&autoview=sku

 

I'm using -6an feed and the stock return. I'm running less then 500 hp at this time (right around 450 actually) so this setup should be adequate.

 

Just slide the hose over the return line and puta hose clamp on it. Thats all I did.....

 

ok this is ghetto, but I just put the 6AN right over the stock hardline and put a screw-type hose clamp on it. still running 20psi on a 60-1 turbo with no problems...

 

Ghetto-schmetto, it works just fine Technically speaking its no different then a rubber hose/hose clamp connection and in comparison is actually better since the braiding will prevent the clamp from cutting the hose.

No bajillion adapters required

 

SAME here!

 

That's what I'm doing now and it leaks. But I'm also running close to 60PSI for fuel pressure but I guess the return line shouldn't see that much pressure.

My setup is going to be different. I use an Evap solenoid to maintain tank vacuum. I've noticed on hot days there will be a spot of gasoline under the car and it appears to be coming from that hose clamp as far as I can tell. I'm going to crank it down some more but I will feel better with the correct adapter there. In my car there is an exahust pipe under that line... so I have to be concerned about that as well.

 

I would bet this is not going to work. It's a Mazda, the line is metric not standard. I had taken a piece of line to a performance parts store that had a ton of AN fittings in stock, nothing worked.

 

I'll let you know, I just ordered one.

 

Get a -6 AN to whatever thread you want adapter, drill the threaded end out as necessary to fit the line, then braze it on.

No crazy adapters or evil hose clamps needed.

 

Good suggestion Aaron.

If it *is* leaking from that connection then something's not right. Either there's a tear in the hose or a rusty section of line or someting because it should seal fine. I've put nearly 30,000km's over the course of three years and five engines running like that and haven't dripped a drop.