[Eric@AMS]

Looks like by as early as next week we might be testing these I will keep you posted

Eric

[Donald-335i]

wow this is gonna be insane

[GreenPlease]

Have you considered re-locating some of the miscellaneous BMW crap on the hot side of the engine bay and run a top-mount setup?

I'm going to have to pop my hood and dream of the possibilities after reading this.

I keep hearing that an M5 fuel pump would work

I would think that an M5's fuel pump couldn't provide the pressures necessary for the N54's direct injection fuel system seeing that the S85 uses port fuel injection.

Looks like by as early as next week we might be testing these

What did you guys figure out for fueling?

[Eric@AMS]

Right now we are going to see how far we can push the factory fuel system. Then we are installing AEM's new trick water/methanol injection system.

CP-E is still working with the factory pump to try and source the cause for failure and thus improve it. Considering as of this morning I went through another pump (now on three) this is of top priority to us as well.

Eric

[GreenPlease]

Wow, three pumps. Sheesh. Something with a heavier duty cycle is clearly needed. Maybe steal a HPFP from the 335d?

[Eric@AMS]

That is a thought but we don't know if that pump is any better just yet.

Eric

[jpsimon]

It's ridiculous how hit or miss the pump situation is... i'm at 31k very hard driven miles and haven't had any issues. Yet you've gone through 3.

how did BMW get this so very wrong

[dlbrooks18]

Originally Posted by Eric@AMS

Looks like by as early as next week we might be testing these I will keep you posted

Eric

thanks for the update!

[GreenPlease]

The HPFP from the 335d has to operate a fuel rail under much greater pressure (~2400psi vs 1600psi). I'd imagine that it is more robust accordingly.

[Eric@AMS]

We just need to see if dimensions and mounting are the same. It's worth a look though.

Eric

[ianthegreat]

Originally Posted by jpsimon

It's ridiculous how hit or miss the pump situation is... i'm at 31k very hard driven miles and haven't had any issues. Yet you've gone through 3.

how did BMW get this so very wrong

+1 26k and first pump

[lacartus]

AMS: looking forward to your update

335d pump: keep in mind that the pump is designed for diesel fuel, it may not have seals compatible with gas and alcohol (10% at most pumps in PA). If anyone has the specs on the pump, you'll want to look for fluoroelastomer seals (e.g., Viton) versus silicone or nitrile (even hydrogenated).

On a side note, I get 90% of my gas from a station that does not sell alcohol-blended gas -- besides offering more energy (e.g., mileage) for the same money, I think it puts less stress on the HPFP seals (swelling at high load). No HPFP issues yet (~20k hard miles).

[GreenPlease]

^
Good point.

[Zeph]

wish I could get no-ethynol gas here but EVERY station has the 10% crap posted on the pumps. I use Shell V-Power and my pump failed out at around 10k miles.

I am almost considering just using Sunoco GTX (98 octane, no ethynol "not oxygenated") all the time since my car is not a daily driver. I use, on average, maybe 10 gallons every 2 weeks. I could just add a 5 gallon drum every week lol which costs about $50 a week for 5 gallons of gas.

Sigh, I hate corn huggers.

[TurboSid]

Originally Posted by lacartus

AMS: looking forward to your update

335d pump: keep in mind that the pump is designed for diesel fuel, it may not have seals compatible with gas and alcohol (10% at most pumps in PA). If anyone has the specs on the pump, you'll want to look for fluoroelastomer seals (e.g., Viton) versus silicone or nitrile (even hydrogenated).

On a side note, I get 90% of my gas from a station that does not sell alcohol-blended gas -- besides offering more energy (e.g., mileage) for the same money, I think it puts less stress on the HPFP seals (swelling at high load). No HPFP issues yet (~20k hard miles).

brand of gas that you get?

[lacartus]

Originally Posted by TurboSid

brand of gas that you get?

I try to use the Phillips 66, but the Citgo is easier to get to...otherwise I get Shell or Texaco, but they both have "up to 10% ethanol".

[GreenPlease]

Updates?

[stealth-twntrbo]

updates...??

[stressdoc]

OT. I use BP/Amoco which at my location is the only 93 Oct fuel and it has no ethanol. Result: 30k with no HPFP problems. Qualifiers: (1) no tune, and (2) dealer replaced it as a precautionary measure even though it was working fine. My car fell into the high frequency of HPFP failure build date range.

[klipseracer]

I'm dying over here to here some news. I keep checking the last page but its always someone talking about pizza or something XD

[Eric@AMS]

^ hahahah I am dying too. Trust me the second I get them here everyone is going to know.

Eric

[klipseracer]

Yeah, I know. But I just couldn't contain myself any longer... Phew.. Now thats over with I feel better. I've SERIOUSLY considered upgrading to a 335i since the first year however with all the fuel delivery issues I've been waiting for all the kinks to get worked out. Hopefully I'll get to see what the power capabilities of the slush box are with this kit you may be providing. Keep in mind, many of us myself included are not interested in running injection of any kind. In arizona, the best fuel you can easily aquire is 91oct. So for me, i'd have to be making the power while running 91 oct from the pump while driving in 90-100* weather. I've followed this thread from the beginning and what you're doing here, Eric, looks very good. Now since you've built the hype, lets see the pics!

-Tyler

EDIT: If you blow the step tranny out while tuning correctly, you will indirectly do the whole community a huge favor determining that limit XD