Stuttering at Spa?

[The Gorilla]

Hi

Shimmy- if you dual feed a pump that 'sucks'
then it should always pull fuel, so long
as one of the feeds is always constantly fed.

The reason being that as fuel is heavier than
air, the pump has to suck the lighter air
through the heavier density fuel, of the constant
supply.

That is why its important to have some hose away from
the 'T' in both directions, so that if one of the feeds is exposed
to air, then its easier for the pump to keep sucking from
the constant feed, than to suck the lighter air in 'through'
the heavier fuel.

Regards,

The Gorilla.

[AlexGTT]

My head is starting to hurt with all this thinking.

Good info Gorilla.:smokin:

[shimmy]

Sorry not convinced

Gonna try it with some straws and Stella tonight!

[karbonkid]

Sounds easier to ensure enough fuel is in tank.

[The Gorilla]

Hi,

Two Straws and Stella will get you pissed,
nothing else.

Sounds like a plan though.

Have one straw, short distance, which then has a 'T'
for two feeds from the 'T' into your Stella.

Sticking two straws straight into the ''Shimisters
Stella sucker'' will not prove the point.

Start sucking up your Stella with both feeds
well into the amber juice, and while still
sucking at an even rate just pull one feed
out, you should still be on the way to getting
well pissed, not spluttering and coughing as usual !!!


Regards,

The Gorilla.

[glendog74]

Sounds easier to ensure enough fuel is in tank.

:thumbs:

[AlexGTT]

Sounds easier to ensure enough fuel is in tank.

That's far too easy.:clown::hahaha:

[shane@mbtech]

Hi,

Two Straws and Stella will get you pissed,
nothing else.

Sounds like a plan though.

Have one straw, short distance, which then has a 'T'
for two feeds from the 'T' into your Stella.

Sticking two straws straight into the ''Shimisters
Stella sucker'' will not prove the point.

Start sucking up your Stella with both feeds
well into the amber juice, and while still
sucking at an even rate just pull one feed
out, you should still be on the way to getting
well pissed, not spluttering and coughing as usual !!!


Regards,

The Gorilla.

I know what you mean fellow ape.

Some good info and theoretically it should work, an easy try to be honest.

The drawbacks of using full tank of juice is the handling characteristics of the car, 1/4 tank is much faster than full tank. And to be fair if you guys didnt want to be quick why modify in the first place.


I only ever had it happen below 1/4 tank, so I never let it drop below from halfway between 1/4 and 1/2, seemed to cure my issues.

[shimmy]

[RolyGTIR]

Sorry not convinced

Gonna try it with some straws and Stella tonight!

Nothing like a pint of wife beater!!! :thumbs:

Might take several pints to fully test this :smt030

[shane@mbtech]

Fuck me your sharp you Shimmy.

Whats heavier? A ton of bricks or a ton of feathers?

[glendog74]

Fuck me your sharp you Shimmy.

Whats heavier? A ton of bricks or a ton of feathers?

W..w..w..what's h..heavier?

Shh..Shh...Shimmy in...O..Oc...October 2009 or Shh..Shh...Shimmy in..Oc..October 2010?

[shimmy]

Fuck me your sharp you Shimmy.

Whats heavier? A ton of bricks or a ton of feathers?

dont start that one, i did that one on the kids last week and still trying to convince them they are the same.......driving me mad :bigcry:

[shane@mbtech]

dont start that one, i did that one on the kids last week and still trying to convince them they are the same.......driving me mad :bigcry:

Ha.:hahaha:

[cantfind1]

Hi,

I have found this thread fascinating.

To address any problem you need to undestand the
cause.

The standard E46 petrol Tank pick up operates
from one side of the tank.

ie] the fuel pump is having to 'suck' the fuel
as opposed to 'push' it from one side only.

Thus when the pipe that the fuel is sucked up
to the fuel pump is not below the fuel
level, then air enters the fuel pump, fuel
pressure drops and the spluttering on
heavy cornering on 1/4 tank can and does
occur.

As the standard fuel pump is rated for 5 bar then
its only issue is fuel supply and what its pick
up is, ie] what distance away from the pump
will it still suck up fuel.

So, if you had a short length of rubber fuel hose
fitted to the bottom of the existing fuel pick
up, then a 'T' fitting, and then another length of fuel hose
to the other side of the tank, which would be no more
that about 1.0 mtr in length, you would ensure that
the fuel pump was always able to suck up fuel,
which is the cause of the problem.

Although this is all internal to the tank, access via
the existing pump set up would be quite easy, and
you have to remove this to fit the CA solution
anyway..

The CA fix just creates another part that can go
wrong, adds more weight !!!!!! and the same
results can be acheived a lot simplier and a whole
lot cheaper.

Regards,

The Gorilla.

Yes well put, however the fundamental floor in your plan is that the crap oem pump is not strong enough to suck fuel through lengths of hose around the tank hence why you install a second pump in place of the sender unit on the left hand side to push fuel to the right hand pump.

Hardly any extra weight as you are replacing the other unit with the same thing any way, it just has a pump in it which weighs grams!

The oem pump degrades over time and does not produce enough flow anyway, hence why i am going with the walbro conversion for piece of mind.

If you want to be tight the just do the walbro conversion and let it suck fuel through pipes from the left and right side of the tank.