mazdadrifter

I'm thinking about using 3/8" fuel line from the metal line right below the firewall thoughout my fuel system in the engine bay. Reasons I'm considering this



1 holds a small amount more fuel and flows more, so less chance of my car starving for it



2 thinking about using a aeromotive fuel filter (replaceable element) that flows more fuel, but it only offers an fittings or 3/8" line



3 I'm planning on running it straight to a mallory rrfpr, so the only place there will be a size difference is at the metal line under the firewall, where I plan on using two screw type hose clamps.



After the fpr, I'm thinking about running -6 an lines to my rails



Any ideas or suggestions?? Or faq's???



Also do you guys know of any aftermarket fuel pulsation dampners? I might have to remove my fpd for a an fitting if i decide to go that route (not to mention that it might catch on fire!!!)

banzaitoyota

You won't be incresing the fuel flow any by doing that

mazdadrifter

well possibly the larger diameter creating a larger amount of present fuel could help avoid any starvation on an instant increase in fuel intake, the main reason would be the compatability with fuel filter



I'm trying to figure out a way, so that I can run my fuel like reTed's diagram. Maybe I'll just use 3/8" all the way around.

1987rx7guy

to decrease starvation just get a higher flowing fuel pump and a good fuel pressure gerulator. A larger line will only decrease PSI

pengaru

I went with -6 throughout, which is 3/8", it works fine.

mazdadrifter

did you just use a 3/8" to -6 an fitting after the filter? I'm not very familiar with an, hosing, is it a bitch to cut? I'm assuming the ends are compression type??

pengaru

The hose is the same as normal rubber hose, it just has a stainless steel braid around it. I cut mine with a cut-off wheel with electrical tape wrapped around it so the SS braid doesnt get all frayed from the cutting.



The AN hose ends that you install on the hose are what turn it into AN plumbing, and yeah it's basically a compression fit. Theres a collar you have to slide onto the hose (difficult if the SS braid is all frayed etc) then you just screw the part with the AN fitting (and bent tube if it's not a straight hose end) into the hose (it threads into the collar). then you're done.



There are newer styles that don't work this way, like 1revvin7's car has, which are just slip on hoses, they slip over the hose ends for installation and thats it, probably alot easier to deal with... but might not capable of dealing with as much pressure, or axial forces (pulling/tugging, this shouldnt happen though).





I just used a hose clamp to put the -6 SS hose on the stock fuel filter, it slipped righ on, and since it's a plain old rubber hose underneathe hose clamps still work just fine... I intend to replace the stock fuel filter eventually with a AN unit and go with SS braided hose all the way back to the tank.

mazdadrifter

Thanks!!!! I'm going to be changing to this fuel filter, it will be easier to change (going to use the same bracket as stock, but put the box end up, so you can change it without even jacking the car up) will filter better with less pressure drop, so u get more flow, and in the long run it will probably end up being cheaper than 25 bucks a pop, all around just a better setup.



I'd love to run an hosing all the way back, but that's a project for another day.





"Straight-through design, 3/8 in. NPT inlet/outlet, 40 micron element, fuel filter



The Aeromotive fuel filter features an advanced flow-through design to allow 1,200 lbs./hr. of steady fuel flow with less than 0.15 psi pressure drop. It's made from 6061-T651 aluminum alloy and has a 40 micron filtering element for reliable protection."

RX7Aggie

that looks real clean. its a pain to take off the current mounting bracket, remove the screw, unclamp both lines, and do it all over again putting it back on.

1Revvin7

Agreed, that filter looks nice. Doesn't seem worth it to me right now, especially since I replaced the stock unit not too long ago..