fuel filter setup
 

Anyone think its okay to keep this dual fuel filter setup here? I bought my car back in 2011 and noticed this back then but never asked about it. Now that I'm contemplating a complete fuel system overhaul I wanted to post this out there for anyone that can chime in... Or is this something completely different and not fuel related?
https://cimg9.ibsrv.net/gimg/www.rx7...ea18cc0604.jpg

Nope, you're right. Those are the fuel filters. They're fine right there. It's where mine is. If you can, mount them a little higher up while still being easily accessible.

Jesus... are those just plastic zip-tied on there!? At least put some worm gear clamps around them if they are.

Also, there is no point to dual filters unless they're run in parallel. If they are in series all you do is increase restriction and the first one will still clog up at the same rate as it catches all the big stuff.

I'll have to jack it back up to check but I don't remember them being plastic but maybe they are. Surprisingly if they are they've held up for a while now. I dont know if they're in series or not. It does make sense to not do a dual if it is in series. The car was sold to me by someone who put in the engine and had originally bought it as a shell so some of the history is pretty spotty. I'm still redocumenting on my build thread what I've done so far though.

Yeah I'll probably work on that when I tackle the fuel pump upgrade and other things fuel related on the car.


Thanks for clarifying all that. I'll try to get better pictures tomorrow to see how they are setup and more details. That photo is about 7 years old and I was just trying to figure if I was correct in assuming that they were filters.

They may have held up, but I'd think zip ties will allow the filter body to vibrate and rub against the subframe. That could gradually eat a hole in the filter body with road/drivetrain vibrations. A real mounting bracket that holds it off the subframe is the way to go. GL.

Use the OEM bracket. See: https://www.rx7club.com/3rd-generati...cation-730863/

Hard to see, but be careful routing fuel hose near the exhaust. Also, fuel hose should be used for vibration locations. Hard fuel line is a better setup where there is no vibration

Seems... redundant.
Got problems locally with fuel quality or something?

So getting a second look at the setup, it's not zip ties, they're held on by metal straps with some kind of padding between the filters and the subframe..

https://cimg1.ibsrv.net/gimg/www.rx7...0fcf735f0a.jpg

It looks like fuel hose is pretty much run from the filter to the factory hardlines and to where it's supposed to go. It doesn't come anywhere near the exhaust.

I mentioned in the initial post that I bought the car with the filter setup this way, I didn't do this. Whoever had the car prior to me did this. It wasn't the guy I bought it from either, he just put the engine in the shell.

https://cimg7.ibsrv.net/gimg/www.rx7...f78e1c1246.jpg

The two red hard lines I circled go to the filter. The one in green still uses a stock fuel hose. The other ends of the filter go back to the fuel tank / fuel pump. So it looks like they're setup as parallel filters which doesn't make sense to me but it doesn't look like I can really get to everything without dropping the axle. The lines are wound around in a way where they don't rub anything but also makes it difficult to change the setup in any way. I mean I can probably get brackets and change the filters to new filters but as far as the lines go they might stay that way til I can drop the rear axle to work on it. I can probably post a video later to better show whats going on.