Stuttering at Spa?

[shane@mbtech]

Fuck me your sharp you Shimmy.

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

[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

[shimmy]

[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.

[AlexGTT]

Sounds easier to ensure enough fuel is in tank.

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

[glendog74]

Sounds easier to ensure enough fuel is in tank.

:thumbs:

[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.

[karbonkid]

Sounds easier to ensure enough fuel is in tank.

[shimmy]

Sorry not convinced

Gonna try it with some straws and Stella tonight!

[AlexGTT]

My head is starting to hurt with all this thinking.

Good info Gorilla.:smokin:

[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.

[shimmy]

So Gorilla you are basically saying keep the OEM set up but increase the chances of continuous fuel pick up by lengthening the pick up pipe and give it two outlets, one either side of the tank

Nice and simple but surely if either of these open ends is pulling air, you will have spluttering!

[The Gorilla]

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.

[mattCSLnut]

Lots of things make me wonder.

I tend to put it down to wheel alignment rather than my shit driving!

But yes you make a good point hence why I replaced my pump, filter and regulator a while back and will soon be fitting one of these!

http://www.horsepowerfreaks.com/partdetails/HPF/Fuel/Fuel_Pump_Install_Kits/E46_M3_Walbro_In_Tank/16889

You guys owe me a drink for all this info! haha

THANX for all you info mate :thumbs: I've been having this same problem, mainly @ Brands Hatch, coming out of Clearways (180 degree right hander turn before the pit straight ) with just under half a tank of GO-GO juice and I've been getting the same misfiring in 4th & 5th + it did it again @ Bedford the other day although admittedly I was below a 1/4 of a tank of fuel. Strangely it doesn't happen @ the Ring but I guess it's because it's a flowing circuit without any 180 degree turns.
He's my appreciation :beer: token, to be cashed in near future :thumbs:

[cantfind1]

think I will do both to be honest, as i already have the oem pumps, so reduces the cost a lot.