Electric Fuel Pump noisy at idle

PostPost by: Verve » Mon May 03, 2010 1:20 pm

Good One Alan : ) !

That "Huco" sounds the business to me ..... no need for Regulators , low pressure designed for our Carb`s in the Engine Bay , no trailing a long live feed to the boot , not over expensive ... and I would always put an in line fuel filter at the tank end , regardless of how the fuel is pumped anyway.... and finally it`s German Reliability ; ) !

So next daft question .... where best in the engine bay ... somewhere in the space made , by moving the risky coil out of the way of the carb`s maybe (my coil is mounted safely on the rad` side bracket ) ... It wouldn`t be seen there and again wiring can be subtly hidden too ??

Thanks for the info` ... it`s just what I was hoping for : ).

Verve.

PS: I`m fine thanx Super John ... I`m learning every day ; ) .
Sprint Drophead , Esprit V8 , 1978 Caterham Big Valve .
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PostPost by: Lincoln62 » Mon May 03, 2010 11:47 pm

I bought my pump from a Weber specialist and he told me it was suitable for both push and pull applications so could be mounted in the engine bay. I put it in the boot because it's out of sight.

I have seen electric pumps mounted on a bracket in the same spot as the mechanical one but the vibration from the engine would be a worry for me.

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PostPost by: milestricks » Fri May 06, 2011 1:17 am

For me whats causing this noisy idle is the defect on your fuel pumps. you should replace it asap to avoid the other circumstances that may appear in your cars performance. better early than late.
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PostPost by: bast0n » Mon May 09, 2011 10:28 am

Hullo all you electric pump fiends!!

Simple question

Why do you need an electric pump with all the wiring, filters,crash switches et all?

I have run mine as an almost daily driver for 25 years on the engine driven pump and never had a problem. Also, pressurised fuel flying about if you should have a leak..........OH DEAR!

There must be a reason for you all spending all this money - what is it?

Don't grow up too quickly...............

D
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PostPost by: robertverhey » Mon May 09, 2011 10:40 am

I'm no particular devotee of the clattering electric fuel pump BUT

Fitted one in the boot after a problematic holiday in Tassie (a hot summer that was!) where my Lotus Cortina suffered chronic fuel starvation due to vaporisation. The electric pump pumps the fuel to the front, where the mechanical pump takes over the last bit. Solved it completely. So they can be useful in hot climates.

Also, the original pump is a right bugger to get at under those webers. Whereas I can have the electric pump out in 30 seconds, and no skinned knuckles or swearing.
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PostPost by: Steve G » Mon May 09, 2011 12:12 pm

bast0n wrote:Hullo all you electric pump fiends!!

Simple question

Why do you need an electric pump with all the wiring, filters,crash switches et all?

I have run mine as an almost daily driver for 25 years on the engine driven pump and never had a problem. Also, pressurised fuel flying about if you should have a leak..........OH DEAR!

There must be a reason for you all spending all this money - what is it?

Don't grow up too quickly...............

D


Pros;

1. An electric fuel pump can produce almost instant fuel pressure. A mechanical pump slowly builds pressure as the engine is cranked for starting. So an electric pump can mean more reliable and expedient starting.

2. Most electric fuel pumps are a rotary type. This produces a smoother flow of fuel (less pressure pulsations) than a reciprocating, mechanical pump.

3. Since most electric pumps are located away from the engine, they help prevent vapour lock. An electric fuel pump pressurises all of the fuel line near the engine (or environmental) heat. This helps avoid vapour lock because pressure makes it more difficult for bubbles to form in the fuel.

4. The electric fuel pump is much easier to inspect, maintain and replace than a mechanical one and, depending on manufacturer/installation, more reliable, so will require less maintenance and be replaced less often.

Cons;

1. Having high pressure fuel pumped into the carbs after a crash or malfunction that would normally kill the mechanical pump.

2. An electric pump is noisy if not installed correctly (I only hear mine before I start the engine as it is no match for the non airboxed twin webers and virtually straight through exhaust).

3. They are expensive.

4. They are non original so not the purist's choice.
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PostPost by: bast0n » Mon May 09, 2011 10:07 pm

So they can be useful in hot climates.

Also, the original pump is a right bugger to get at under those webers. Whereas I can have the electric pump out in 30 seconds, and no skinned knuckles or swearing.


Well, yes to all of the above, but I regularly go to Italy and hit plus 35c in traffic and go over the highest Alpine passes and have never had vapourisation problems, and yes it is a bugger to get at but if it does not fail in 25 years who cares.................. :D

Don't grow old too quickly............

D
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