S50B32 fuel pump question…

[jaistanley]

The fuel pump is dying in my 318is occasionally leaving me stranded and requiring a good smacking before it'll play ball. I wasn't worried by this though as I am soon fitting (to something, if it kills me) an S50B32 anyway and imagine I will require an up-rated fuel pump of some sort.

My question is: What fuel pumps are suitable and will fit the tank?

Ian/buster/bigpimpin/330is, which pump did you use? I'm thinking go and find an e36 3.0/3.2 M3 breaking and take both the radiator (I need) and the fuel pump. Will this fit?. The one from the ZRoadster was buried in the car (after I'd chucked all the redundant bits in before towing away). When I found it I realised it is in a different orientation due to the up-right fitting of the tank so left it there.

Many thanks in advance.

Jai

[glenn]

the 3.0 fuel pump will be no good for you mate,
you need the one off the 3.2.
the 3.2 is a 5bar unit, the 3.0 is lower

[e30_Turbo]

There is always the Walboro 255 and the one Toby fittted, good for 5bar all day and the most common fuel pump upgrade I've come across, straight fit too IIRC.

http://cgi.ebay.co.uk/WALBRO-H-R-C-Upra ... dZViewItem

Might get one myself at that price!

HTH, Mark.

[fuzzy]

i might as well get one of they walbro pumps before i fit my new tank

[buster]

i used the 5 bar one from the Evo.
I payed the same for mine but mine was used,so i suppose those walbro ones look like a good bargain.

[jaistanley]

So is that henko one a straight swap??

If so i'll get one now.

Jai

[ian332isport]

I used the Evo pump on my car. It's not that hard to fit.

The problem I found when looking at non genuine pumps is that they don't often quote flow rate at a particular pressure. They may be able to flow a certain amount at 4 bar, but not at 6 bar. It's the pressure value that's important, as the engine doesn't care about flow rates as long as it can maintain 5 bar in the fuel rail (pump needs to provide over 5 bar to support this properly).

If you use the correct Evo pump, you are 100% sure it's up to the job.

Ian.

[jmc330i]

Is it just the Evo fuel pump thats 5 bar?

As I understand it, Im ok with the E30 325i pump on my 3.0ltr conversion.

[buster]

Is it just the Evo fuel pump thats 5 bar?

As I understand it, Im ok with the E30 325i pump on my 3.0ltr conversion.

the 3 ltr is ok on the 325 pump ,its only the evo that needs the 5 bar pump so your ok .

[jmc330i]

I thought so, cheers

[jaistanley]

How much should I pay for a second hand Me Evo pump then? I was thinking of offering a guy breaking one £30 plus postage. Sound right? (well if it's too low I'm sure he'll tell me).

If it's going to be the same price as the new Henko I might take the gamble though I am a little aprehensive. As Ian says, at least you DEFINATELY know the Evo one is up to the job.

I'm right in thinking I can fit this now am I? My 318is pump is dying a death and need to replace it in the short term. My pressure regulator will take care of the fuel pressure and it'll all work OK right?

I only ask in case the pupm has too much guts for the FPR and the car over-fuels.

Jai

[buster]

I payed £50 for mine,Fab sell em for £60 i think.

[bigpimpin]

Oh, I've still got the 325 pump, looks like I'll have to get me an evo one then. I dont suppose lack of pressure will do anything bad in the meantime though?

I drove her up to the MOT station today, I was a little scared to be honest! should be totally legal tomorrow....ready for a REAL shakedown !

[ian332isport]

I dont suppose lack of pressure will do anything bad in the meantime though?

With normal driving, you won't do any damage on the standard pump. I would advise changing the pump before giving it a serious thrashing though, or you run the risk of running weak under hard load which could do some damage.

Cheers,

Ian.

[jmc330i]

I drove her up to the MOT station today, I was a little scared to be honest! should be totally legal tomorrow....ready for a REAL shakedown !

[bigpimpin]

Indeed, twas a proud moment!

But I need a clutch master cylinder as I was having to pump it a bit when changing gears!

Fuel Pump is coming, do I need any other parts to fit this pump?
Is it pretty obvious when everything is in front of you?

[ian332isport]

Fuel Pump is coming, do I need any other parts to fit this pump?
Is it pretty obvious when everything is in front of you?

Andy (Buster) did his recently and took a photo. I'm sure I had a copy, but I'm buggered if I can find it

You will find the Evo pump comes mounted in a plastic frame with the level sender etc. You need to remove all of this so you have just the pump. This pump is a little longer and a little fatter than the standard E30 pump, but it can be fitted to the E30 pump frame without much work. You can't use the original plastic push fitting that joins the pump to the outlet pipe, as the Evo pump is too long. You need to use a short length of fuel hose and a couple of hose clips to join them together.

The foot of the support frame will also need a little trimming to get the pump to sit correctly, but it's fairly obvious when it's in front of you.

Get the picture from Andy and all should be clear.

Cheers,

Ian.

[buster]

heres two pics i took of mine but i later striped it again to add some rubber to insulate the noise.

[bigpimpin]

Nice one, it should arrive on Thursday.

I've just taken the back seats out, I presume the pump in underneath one ot those blanking plates?

[ian332isport]

I presume the pump in underneath one ot those blanking plates?:

Yes, the one on the drivers side.

You need to remove the level sender before the pump can be removed. Pull off the electrical connections and then undo the 4 small nuts on the top flange. You can then lift out the cylindrical level sender (have a jam jar handy to put it in - it drips petrol for a while).

Once this is out, use a pair of crossed screwdrivers to rotate the rest of the pump flange and you can then lift it out. You need to rotate the assembly as you lift it to get it out of the hole.

Cheers,

Ian.

[jaistanley]

The usual mine of info Ian... Many thanks.

I've been offered a pump from a second hand Evo for £65 which seems a little steep, I think I'd rather go for the Henko one mentioned earlier but am aprehensive about its ability to deliver a suitable flow rate at 5 bar.

Hmmm.. Descisions.

Bigpimpin: Awesome mate.

Jai

[bigpimpin]

I got one from BMW Spares, £58 delivered.

[bigpimpin]

Took her out for a longer blast last night and I can't wait to get that pump in tonight!

It starts to splutter a bit, but lift of for a few seconds and it goes fine again. I hope this is just the lack of fuel!

Car feels nice and tight on the road anyway, just want to give her full throttle to see what I've got !

What RPM does the evo motor red line at? I was purring around under 4K revs but it didn't feel a huge amount quicker than the 325i sport!

[GermanGorilla]

Hi,

I would suggest you keep south of around 7000 rpm, until you
have everything settled and running correctly.

7750 is about max, if you want to preserve your engine, if not,
then they will rev upto around 8-8250 beofre the rev limiter starts
kicking in, if its not been de-limited.

Most of the power on the standard engine comes from
about 5250 up to 7500, where it starts to tail off.

After a couple of good thrashes, check the Vanos for any oil seepage
or leaks, if you see any then recitfy, otherwise you could well be on
your third engine before you know it.

Regards,

The Gorilla.

[jaistanley]

Flipping 'eck.. They that fragile??

So the factory limiter is that high? It's well worth fitting uprated rod bolts then? (are the rods OK for these revs?)

Jai

[GermanGorilla]

Hi,

Its not the Rods that are a problem, its the Stretch Bolts.

Once the bolts get stretched, it all gets loose and then lets go.
High rpm induces stretched bolts.

Thus the rods in appearing through the block sidewall, get the blame.

People seem to forget, that these engines are very near the top
of their game, getting say 50 BHP more from these engines is
around 10 k plus.

A BMW dealer in Germany has over 415 BHP from his, but it cost north
of 35,000 euro.

I would not say they are fragile, but they require respect and constant
maintenance.

Regards,

The Gorilla.

[bigpimpin]

Thanks Gorilla, I dont plan to EVER put another engine in it so will keep below those limits.

Hopefully I'll be hitting over 5250rpm tonight when I change the pump