Fuel filter

[kmswi]

I'd like to eliminate the filter inline on top of eng and install one between the tank and mech fuel pump, is that practical? I had a friend who had an engine fire and want to not have that happen to me. (76 gmc c10 long box 2wd,sbc.350 trans.)

[Bandit130]

With an engine fire the filter on top of engine may or may not be an issue unless it leaks. You might be able to install filter in rubber hose from tank sending unit to metal line. May have to drop tank to do that. Or you may have space from metal line to pump. Mine has rubber hose there and appears there is room for filter.

[kmswi]

I need to replace the metal lines from tank to fuel pump anyway, maybe install a filter with threaded ends? Any opinions on filter sizes,restriction specs.?

[geezer#99]

Why not replace the filter in the carb?

Which carb?

[Justins76]

With mechanical pumps, its better to have the filter after the pump.

[Pontiac1976]

The best place I found is down in front of the mechanical pumps the in line side going to the pump by the frame near the cross frame that the proportioning valve bolts to. I use a Fram G2 (plastic clear) stock 5/16" or the Fram G3 (plastic clear) 3/8" If you up graded your line. This way you can see the fuel it will not melt down there because it's get air flow the rad and the fan and when your driving

[kmswi]

Any recommendations as to size,restriction in the frame before the mech pump?

[Dead Parrot]

Since you are replacing the metal lines from tank to pump, might look at getting one of the in line filters for a fuel injection system.

On my 75, I use a Fram G3 type between the frame line and fuel pump.

[sweetk30]

Originally Posted by Justins76

With mechanical pumps, its better to have the filter after the pump.

makes since . . but gm didnt do this . my gmc7000 with a 366 and carb and mech fuel pump has the filter on the suction side out of the tank way before the pump .

but i wouldnt be to worried of a gas fire under the hood IF all the correct stuff was used and nothing was cheep and sketchy . this is were most fires start is cutting corners on parts and hose not rated for specific fuel kinds or psi ranges .

[Pontiac1976]

I run the G3 on the Pontiac for year drove all the way down the GA raced there 11 rounds. 10min run hit the highway speeds ( it was hot that year.) 170 temps highway 200 temp drove to NY race track long island race there, headed north east Canada 1993 back never had any trouble with the G3 fuel filter car. Or the Truck with the 454 fuel filter G2 mount in the same place. The 454 used to heat soak up to 230 temp. I fried a few eggs on the valve cover to show the heat in BBC. back in the day. But never had a fuel filter problems other then the dirt that got stopped by the filter.

[Pontiac1976]

Just a side not fuel filter should not be any where top 3/4 of the motor that where the heat the highest ( heat rises). Some problems the fuel get hot, in the filter can lead to vapor lock. Melt the plastic filter, boil the gas, the cheap glass fuel filter will break once getting to hot one too many times.

[Axle]

WIX 33033. 3/8" inlet & outlet, all metal construction.

Alex.

[kmswi]

any with threaded inlet/outlet?

[Justins76]

Originally Posted by kmswi

any with threaded inlet/outlet?

ACDELCO GF652. M16 o-ring connection.

[Gregski]

i run two filters one before the fuel pump and one right before the carb, extra insurance, I have a Holley 4160, I believe cleaning the fuel right before it enters the carb is the best spot to do it as it can pick up debris in the fuel pump or in the hard line leading to the carb

[D13]

Mechanical fuel pumps do not like restrictions before them, they push better than they suck. The opuropse of the filter is to protect the carb / injectors, including from debris of a pump failure. It should always be after the pump. It's ok to protect the pump with a low restriction high flow filter, although this is pretty much a waste on most mechanical pumps. They will happliy pump fine sand with no real issues.

As an example, the big failure on 6.2 diesel electric lift pumps is large tank debris ingested by the pump, either just small enough to pass the sock or due to sock failure. The cure is a 60 micron filter right before the pump, and retaining the sub-20 micron filter to protect the expensive injection pump. That way the lift pump is protected but doesn't have to suck fuel very far, and the injection pump and injectors are protected with little pressure drop.