Malpassi filter King Alternatives and thoughts

[Exminiman]

Just about to change seals, diaphragm etc....on small Filter King, surprisingly, cost is about half of a new one!

Just wondering what others use, I need to keep PSI to around 3-4 and the Filter Kings do seem a bit agricultural in the way they work.

Also, considering splitting the filter and regulator functions to save a bit of space.

Appreciate anyone's thoughts or experiences ?

[Oneball]

I’ve got a filter king in the Mini and a separate Holley in line filter and Holley return style regulator in the Vette. It may be a super duper one that’ll flow 120gph but it’s still a spring, a screw and diaphragm like the Filter King. As long as they’re a reputable make and flow what you need I don’t think theres much to be gained from changing.

[Peter Laidler]

If you are using the standard SU pump with SU carbs then the Filter King is no more than a filter. The pump controls the pressure OUT and the fuel bowl valves control the rate of flow IN quite effectively

We've been here before so got my steel helmet on awaiting the incoming flak

[Exminiman]

If you are using the standard SU pump with SU carbs then the Filter King is no more than a filter. The pump controls the pressure OUT and the fuel bowl valves control the rate of flow IN quite effectively

We've been here before so got my steel helmet on awaiting the incoming flak

Its ok Peter , not using an SU pump, so need to regulate it down for the Weber.

[Exminiman]

I’ve got a filter king in the Mini and a separate Holley in line filter and Holley return style regulator in the Vette. It may be a super duper one that’ll flow 120gph but it’s still a spring, a screw and diaphragm like the Filter King. As long as they’re a reputable make and flow what you need I don’t think theres much to be gained from changing.

You are probably right, just thought I would ask the question out of interest as much as anything.

If you want to, you can spend a load of money on a regulator, but for what ?

[Exminiman]

Carrying this on a bit. Looking at pictures of Brian Johnson`s S currently for sale on FB by Swiftune.

Fuel Pressure regulator is in the boot rather than under the bonnet.

While this is obviously easier to fit, surly you want the regulator as close to the carbs as possible - so you know the pressure at the carbs, rather than 10 feet back in the boot ?

An awlful lot can happen to the fuel pipe in 10 feet, especially if its flexible, what if the pipe is kinked, what if ......

Not sure if this Mini was actually built by Swift or not
...

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Brian Johnsons Mini.jpg

[surfblue63]

While this is obviously easier to fit, surly you want the regulator as close to the carbs as possible - so you know the pressure at the carbs, rather than 10 feet back in the boot ?

An awlful lot can happen to the fuel pipe in 10 feet, especially if its flexible, what if the pipe is kinked, what if ......

It is only a problem if you do not have enough flow. The pressure will build up when the float regulates the flow into the carb. You could always test the pressure at the outlet and adjust the regulator to allow for any pressure loss in the six foot of pipe.
As for a kink in the pipe, I think that would cause flow problems irrespective of whether it was before or after the regulator.

[Polarsilver]

a car came to me with the the fuel line ( internal ) front to back in Flex Pipe .. wondered why i could smell Fuel after the car was shut up for a while .. changed that Rubber Pipe to Bundy & that fuel smell issue went away .. with a pressure regulation near the pump i do not see an issue with pressure loss up to the carbs ..yes its all about Flow and flow is relative to bore size of the pipe & if you have Kinks in the Pipe change the Pipe .

[Exminiman]

Thanks for the comments

My thought was really that if you regulate the pressure down to say 3 pounds at the back (from the 6 pounds coming out of the pump) you have quite a lot of pipe (more opportunity) for that 3 pounds to be degraded by a kink, dodgy pipe, what ever.

Where as if most of the pipe is at the 6 pounds and just the last bit at 3 pounds, then there is less opportunity for the pressure at the carb to be degraded.....or effected

Take the point that regardless of where the regulator goes you would set the regulator pressure based on the pressure at the carb.

Maybe (probably) over thinking it.


But dont most cars have the regulator under the bonnet ?