73BBVette

There wasnt much left to the fuel system on my 73 when I got it. Piecing it back together, the only fuel filter is the small inlet filter in the carb. (qjet). Other than the pick-up screen in the tank, was there anything else? I've seen some canister type filters spliced in the fuel line up by the engine on some of the older big blocks. Was wonder if I should put one in, if so, what's a good one to use. I have this older frame rail filter from a mid 90's suburban. The size is about right but I dont think the fittings will work. Suggestions?

Alan 71

Hi 73,
No, originally there were just the 2 you mention. The sock on the sender in the tank and the filter built into the q-jet.
Is there a situation that's making you feel you need something else?
Regards,
Alan

71 Green 454

The Qjet fuel filter is all you need, but if you want to fabricate an inline filter, here is an article by Lars on how to build one.
I'm in the process of fabricating an inline fuel filter on my '71 BB. I'm using a new steel fuel line, a Summit fuel filter and fittings. These are AN fittings and require a 37 degree flare on the fuel line.

Lars instructions:
https://www.google.com/url?sa=i&url=...r4kDegUIARC2AQ

My plan:



Should look like this:

73BBVette

Thanks 71, I'll check Summit's web site for that. That looks like a clean install too from the picture above. Alan, no situation as I haven't fired the engine yet. But looking at a lot of under hood pictures, I see a lot of them installed, even factory AC filters. Just wondering if it was needed or not. Considering that there wasn't any thing else originally on the car, maybe I'll rethink this a while.....

Easy Mike

FWIW: The 68s and 69s used an in-line filter similar to what you have. It mounted on the rear of the AIR pump. The set up required a fuel return line.

ddawson

Do you have a return line? If so you can order the correct fuel lines and GF 432 filter.

73BBVette

No, no return line.

71 f/w driver

I did the same as 71 Green, using Russells 6 AN fittings and filter purchased from Summit. No interference behind A/C front mounting bracket and head. filter is 40 micron(?). I have this mounted to a holley 4175 carb. I do plan going back to QJ rochester but will leave the fuel line. my .02 cents.
Mike

Alan 71

Hi 71,
The return line would be a pipe running off the bottom of the fuel pump.
Have you checked to see if there's one there?
Regards,
Alan

This is the typical return line.

73BBVette

A return line from the fuel pump back to the fuel tank? Yes, I have that plumbed already.


I thought he was asking about a line that would attach to the filter, like the second one on the top.
https://www.google.com/search?q=1973...lhxwDf-oVtM%3A

JLmiller

I add one back buy the gas tank. It was easy to splice into the rubber line.

lars

There is no good reason to install an in-line filter if you have a street car with the in-carb Q-Jet filter. If you want an in-line filter for the looks, be sure to remove the in-carb filter - running 2 filters will cause fuel flow problems, so just run one or the other. Especially bad is running a fliter on the suction side of a mechanical diaphragm pump, such as back by the tank. That will induce vapor lock issues and fuel starvation at high rpm - only use a filter on the pressure side of the pump.

The in-carb filter actually flows pretty good, and the paper element is the same element that a lot of the aftermarket in-line filters use inside their aluminum housings - you would be replacing the in-carb filter for exactly the same filter in an in-line housing, with a bunch of work to make it work. Not sure there's much of a point to that...

Lars

73BBVette

Thanks for the information guys. I'm just going to leave it as is. No need to try fix what wasn't broken.