The Alpina pump is no longer available. You need a Bosch 044 pump. This thead gives a bit more info

http://www.m5board.com/vbulletin/alpinaboard-com-bmw-alpina-discussion/139839-bt-fuel-pump.html

 

If you can use an 044 that is the way to go. I have used that pump before on other things and never had an issue.

 

mine goes inside the tank, am told the 044 goes outside the tank ?

 

Alpina 1331611 is the outside pump. The inside tank pump is just a helper pump. If you need the inside pump it is BMW 16141180889.

 

Hi, if you are looking to replace the in tank fuel pump you need an 040 pump, the full part number is 0 580 254 040. This is the one I bought a couple of years ago and works fine but the cradle needs to be modified as the outside diameter is slightly smaller than the original one.

 

Excuse my complete ignorance on this, but I thought there was only the pump in the tank (accessed from the trunk/boot). Where is the second pump located?

 

I thought there was only the pump in the tank (accessed from the trunk/boot).

+1. I've got a 044 but haven't fitted it yet. If it doesn't go in the tank, I want to know where it lives!

 

I am going off the Alpina parts catalog that there are two pumps. #19 shows as the inside pump and #35 shows as an alpina only part. As far as location I don't know but I would assume under the right rear.

http://www.thealpinaregister.com/downloads/completecats/e32ande34.pdf

 

Thanks for that. When I look up the #19 BMW part number (16 14 1 180 889) it just shows it as the sending unit with no pump. So I guess I am confused as to whether that is the sending unit with a pump or if that is the sending unit that the Alpina 13 31 611 pump attaches to.

Can anyone shed some light on this topic please?

 

I think you are correct on one pump. My experience is in the older 5 series e12 and e28 and they have two pumps. When I saw in the Alpina catalog what looked like a support pump it only made since that it was an external pump like the earlier cars but it looks like my logic was faulty.

 

In the catalogue part number 19 is the fuel level sender while 35 is the pump itself, i'm pretty sure there is only one pump on these cars. The fuel level sender unit looks similar in the picture but definately has no pump in it, i'd imagine its shape is designed to hold fuel steady to give a smooth reading. With regards to the cradle modification, I noticed today that the e34 m5 cradle has a smaller diameter than the original b10 bt one because the pump itself is thinner so this may be an option.

 

thanks for the help lads, ended up ring alpina in germany who told me: " Unfortunately the ALPINA fuel pump 13 31 611 is not available anymore.
> It is only possible that you use the standard BMW fuel pump. The car will run with the standard fuel pump, BUT the car should not be driven full power for a long distance, as the engine will come poor and this will cause a damage to the catalysts."
The BMW part number is 1 181 354 which is 3.5 bar pressure instead of the 3.8 bar pressure that the original worked at.
didnt go to BMW but got it off ebay, price ranged from £34.99 to £299.99 for what was al a copy of the original part.
The one I got was £45.00 from what looks like a reputable ebayer with 12 months warranty,
whats everyone think? do you get what you pay for or do suppliers just pick there own prices?
thanks again

 

I think the price you got on the pump is good and would not hesitate to use it in a regular E34. However, I would be hesitant to use it in the BT. When I dyno'd my BT a couple of years ago it flagged a slightly lean condition at wot, and I have the stock Alpina pump. This is what prompted me to get the Bosch 044 pump. If you can keep your foot out of it then the pump you bought should be ok. I, for one, can not keep my foot out of it.

My 2 cents

 

I was told on here to go for the bosch 044 and ive just googled it and it says its 5bar ! but it doesnt look the same as mine.
problem is the cars in spain and im in uk at the moment but you could be correct,am over in spain next week so will have a look and go for the 044 if it fits.cheers

 

I'm confused by this. The fuel pressure is controlled by the FPR on the fuel rail and if it's set at 3.8 BAR tha't the pressure in the fuel rail. If the fuel pump you fit cannot meet the flow demands of the BT engine to maintain 3.8 Bar at Wide Open Throttle (WOT) then you shouldn't fit it. The engine will run lean, you'll run the risk of detonation and damaging your pistons. I've done a lot of tuning work to my E30 M3 and have a deep understanding of the way fuel pressure fluctuations can change the AFR and if I remember correctly, one of the limiting factors to simply tuning the BT by upping to boost pressure was that the injectors were already too close to max duration at the 3.8 BAR pressure, so if anything, you need more flow, not less. Fit the Bosch pump which can maintain 5 BAR and have the FPR control the pressure at the fuel rail - much safer that way! Cheers, Dave.

 

thanks for that dave, now gonna get a bosch pump. appreciate yours and everyones comments, cheers