Fuel filter location [Archive] - Chevelle Tech

: Fuel filter location


Chris_69_SS
Jul 5th, 07, 2:21 PM
Can I run my Aeromotive filter between the tank and my Carter 172? This would be instead of the usual between the pump & carb.

Any advantages/disadvantages? To me it should not make a diff. but just want to be sure.

Thanks,

CDN SS
Jul 5th, 07, 3:33 PM
Can I run my Aeromotive filter between the tank and my Carter 172? This would be instead of the usual between the pump & carb.

Any advantages/disadvantages? To me it should not make a diff. but just want to be sure.

Thanks,

Thats how mine set up no problem so far ... 1/2" id tank pickup with no sock so I use large Aeromotive filter right at tank with replaceable paper cartridge , mech pump .......no filter at carb ..........check my tank filter once a season so far no problem

540Hotrod
Jul 5th, 07, 4:33 PM
If you're going to put it on suction side make sure it's not restrictive.....like the 100micron range. Generally you just want something to catch rocks on suction side. Pumps push a lot better than they pull and restriction is bad on that side of pump for sure.

CDN SS
Jul 5th, 07, 7:53 PM
If you're going to put it on suction side make sure it's not restrictive.....like the 100micron range. Generally you just want something to catch rocks on suction side. Pumps push a lot better than they pull and restriction is bad on that side of pump for sure.


Good point ...I use the 100 micron cartridge

jbird
Jul 5th, 07, 10:59 PM
If you're going to put it on suction side make sure it's not restrictive.....like the 100micron range. Generally you just want something to catch rocks on suction side. Pumps push a lot better than they pull and restriction is bad on that side of pump for sure.

Absolutely. I've been chasing a fuel delivery problem. Finally remembered my filter was 25 micron,(went back to the reciept). No good if on the suction side!!! Now have a 75 micron.

Skeeveman
Jul 6th, 07, 12:06 AM
I'm using two Russell 40 micron filters, one at the tank, and one right before the pump. Haven't had any problems, maybe the volume of the -8 an makes up for the restriction?

540Hotrod
Jul 6th, 07, 12:20 AM
I don't run anything in front of my electric pump. I'm just careful where I fill up. I'd rather do that than cavitate the pump. There's nothing going into the tank that didn't come through the filters on the pumps at the station. And even if they never change them...that's good for you...the more restricted they become....the better they filter! That old sock in the tank didn't filter much at all.

We recently returned from a 2000 mile roadtrip with a bunch of old Vette's. All did well except for this one stock 454" '74 Vette. It kept dying...and then would restart. By the time we all would get pulled over and get back to him..it would fire up. At first he thought it was ignition issues. I quizzed and quizzed about how it acted....but never got a good story. Finally about 1500 miles into the trip I had had about enough of all the pulling over. He had mentioned he had added a filter in line coming out of the tank as a precaution. I had mentioned several times we ought to pull it off but he somehow thought he was doing good. Finally I insisted on pulling and layed under car getting gas all over me to remove it. The filter appeared clean and blowing through it looked good.

Long story short...the sucker ran the next 500 miles (and is still running fine) without a hiccup. He even did some WOT runs and it finally ran! I'm assuming the pump is weak...and he has a new one to install now....but it just illustrates how any restriction at all on suction side is bad. If you pull a vacuum on the inlet line.....if it's even remotely close to vapor locking..it surely is going to do it with lowered pressures. The new fuels we have today weren't designed for our carb junk. It's made to do good under 50 psi of pressure in an EFI system. It's much more likely to flash and boil than the old days.

I'll admit I've run a filter on a car with a seriously contaminated tank...but as soon as tank was replaced/cleaned...I took it off.

Again, no restriction is good.


JIM

Chris_69_SS
Jul 6th, 07, 11:45 AM
If you're going to put it on suction side make sure it's not restrictive.....like the 100micron range. Generally you just want something to catch rocks on suction side. Pumps push a lot better than they pull and restriction is bad on that side of pump for sure.

Yep, mine is 100 micron. Checked the Aeromotive web site and the recommend a 100 micron filter between tank & pump & 10 micron between pump & carb.

Thanks everyone.