Gas Filter Mounting Location

[Clois Harlan]

I am moving my Fram Fuel Filter to the front of my engine and was wondering where everyone else mounts their Filter and Fuel pressure regulator?

Clois

[Ron61]

Clois,

I don't have any pictures to post but I have mine mounted in front and on top where it is real easy to get to. I use a clear in-line fuel fuilter and a Holly regulator so I like them up where they are easy to get to and see. I see several of the others have their regulators mounted where I have mine and the filter down on the side where the mechanical fuel pump would go.

Ron

[Mr.Fixit]

I like having the filter before the pump and the regulator as close to the carb as possible.

[Guinness]

I mounted a fuel pressure isolator on the fire wall, underneath the oil puke tank. The dash mounted fuel pressure gauge connects to the back of the isolator. This keeps fuel out of the cockpit. The filter and electric pump are mounted in the trunk.
Jeff

[Clois Harlan]

I have seen several of the racing guys at Run and Gun as well as last week in Texas with their cartridge type filters mounted up front of their engines. Do you guys think this is not effecient? It seems to me that it would be effecient and easy to replace filters.
Additionally, it would allow the fuel feed to be less effected by syntrifical force (spelling) by hard accelerations.

Clois

[mikiec]

Call me crazy...

I have a filter just outside of the tank, before the electric pump, I have a filter after the pump and one just before the carb.

Mike

[KobraKarl]

Does any one know where to get the oribinal style canister with the the side fittings that mounted just forward of the # 5 cylinder?

[Clois Harlan]

After careful consideration of everyones input I think I will also mount my primary 10 micron fram fuel filter in front of my electric fuel pump (located forward of my fuel cell in the rear of my car). I will carry my fuel via 1/2" steel tubing up my frame rails to a place adjacent to my #5 cylinder where I will come off with 1/2" braided stainless aircraft hose, snake it to the top of my engine to my fuel regulator, into a line filter and into my carb.

If anyone sees a potential problem with these please chime in now.

Thanks,

Clois

[Tom Wells]

Hello Clois,

Not sure what you mean by "in front of my
electric fuel pump".

If you meant gastank -> filter -> pump then it might be a good idea to go with a 100 micron filter instead of the 10 micron.

If you meant gastank -> pump -> filter you should be OK.

Reason for this is that with EFI (admittedly a different situation ) the 10 micron filter can increase the likelihood of cavitation at the pump inlet due to pressure drop across the filter. Might not be a factor with a carb setup but thought I'd raise the point just in case. The 100 micron filter operates at a lesser pressure drop, and the 10 micron should give nice protection between the pump and the engine.

Offered with good intention ,

Tom

[Clois Harlan]

Tom,

Thanks for raising that point. To be on the safe side I will locate gastank-gastank -> pump -> filter. I presently have my regulator located on my firewall and I am going to relocate that to a bracket on top of my engine near my right valve cover.

Reason for these changes: I have noticed at some of the road courses I run I ocassionally get a little fuel starvation in some high speed turns.

Thanks, it is always good to get some other ideas.

Clois

[Tom Wells]

Hi Clois,

I'm going to violate my rule and cover more than one subject below

First, here's my filter arrangement (I went with Aeromotive's recommendations):

100 micron filter -> pump -> 10 micron filter

This way, the 100 micron filter protects the pump from "tank trash" and the 10 micron filter protects the injectors/carbs. The pressure drop across a high-capacity 100 micron filter should be little enough not to lower the pump intake pressure too much.

Second, "fuel starvation in turns"

can be caused by at least two things: fuel sloshing away from the fuel tank pickup, or fuel sloshing away from the jets in the fuel bowls on the carb. As you would expect, the solutions to these are different depending on the hardware

On a carbureted engine, the fuel bowl problem is the most likely cause. An EFI'd engine would probably suffer from the fuel tank slosh problem.

This difference is because the fuel bowls in the carb(s) act as a reservoir, where the (usually) only reservoir in an EFI system is the tank itself.

If you have carbs and you experience this sloshing effect, there are adjustments and small mods you can make to the carbs to help minimize the effect. "Dog whistles", bowl vent extensions and float level adjustments come to mind.

Third and last, I put my pressure regulator on the firewall where it is away from the major engine heat and vibration. I've never liked the engine as a place to mount that item

Hope this helps,

Tom

[Mr.Fixit]

I recommend against putting anything between the regulator and the carb/fuel rail. You don't want a possible pressure dropping restriction after pressure regulation.