[Solid67]

I posted this as a response in another thread but figured it needed to be its own thread.

I want to know why fuel pump replacement is such a problem for any of the B58 powered vehicles (except for the new iteration)? I really don't get it considering for the majority of other performance cars, its literally a drop in solution. Like how hard is it to replace the LPFP or HPFP with a Walboro 450 or 525 pump? Doesn't it seem crazy that after 3-4 years of this motor being out that a proper fueling solution/system has not been discovered? Seems kind of ridiculous to be honest. We are still talking about methanol and port injection, but can't get a @#$% replacement pump?

I would like to hear from tuners, vendors, manufactures and basically anyone that has knowledge on this topic that why is it taking so long to literally just replace a pump with something that flows more because I know the B58 stock injectors and fuel lines are not an issue, at least I haven't seen anyone talking about them being a problem.

[baldeagleman]

I'd like to know this as well because a lot of the high HP cars here are running meth which I probably would never consider doing to my daily. I want to see something running high HP on pump gas.

[PURE340i]

Mission Performance is working on a internal upgrade on the stock high pressure fuel pump so this might be a great solution. As far as the low pressure side, I don't know anyone that's made or modded the oem unit to a bigger pump like a Walbro.

[nikman011]

Originally Posted by PURE340i

Mission Performance is working on a internal upgrade on the stock high pressure fuel pump so this might be a great solution. As far as the low pressure side, I don't know anyone that's made or modded the oem unit to a bigger pump like a Walbro.

I think Alex said they set it aside, not sure why, do you know if he fired it back up?

MissionPerformance

[rahlow]

Originally Posted by nikman011

I think Alex said they set it aside, not sure why, do you know if he fired it back up?

MissionPerformance

Probably couldn't figure it out. BMW has the upper hand against tuners on this 1. I also am surprised no 1 has figured this and it's been a while now.

[CntryClub007]

You might get more activity over on N54Tech TBH. Lots more motor activity over there.

BigBoost has been doing quite a bit of stuff, but I don't know what the fueling setup looks like.

I thought I saw something on Instagram from Twisted Tuning too.



From my understanding as well, with an MHD BEF, the fuel pump glitch (lack of ability to supply dilemma) has gone away now that the DME is cracked. Under stock flash, the fuel pump was software limited, now it is not.

[Nugget]

LPFP is easy, HPFP not so much. There still isn't a proper HPFP upgrade for the N54 and that's been out for 13 years.

Looking at our HPFP, it looks very similar to the N55 ones. So I would expect something like the XDI HPFPs shouldn't be too hard to adapt to a B58.
I know some N55 people have bolted on B58 HPFP as it is supposed to be slightly better.

Then you need the tuners to support it, I know MHD and BM3 have built in support for XDI pumps on N55s.

[baldeagleman]

Originally Posted by CntryClub007

You might get more activity over on N54Tech TBH. Lots more motor activity over there.

BigBoost has been doing quite a bit of stuff, but I don't know what the fueling setup looks like.

I thought I saw something on Instagram from Twisted Tuning too.



From my understanding as well, with an MHD BEF, the fuel pump glitch (lack of ability to supply dilemma) has gone away now that the DME is cracked. Under stock flash, the fuel pump was software limited, now it is not.

So without the software limiter can you do something like pure stage 2 with just JB4 + MHD BEF and no meth?

[Fuel-It!]

The issue isn't the low pressure pump it's the high pressure pump. We have a great solution coming soon in the form of B58 CPI.

[Solid67]

Any idea if the HPFP from the B58 TU1 can be swapped in? Maybe the entire fuel system?

[Nugget]

Originally Posted by Fuel-It!

The issue isn't the low pressure pump it's the high pressure pump. We have a great solution coming soon in the form of B58 CPI.

Is there a safety concern injecting fuel into a charge pipe right above a hot turbo?

[PURE340i]

Originally Posted by Nugget

Is there a safety concern injecting fuel into a charge pipe right above a hot turbo?

It will be injected near the throttle body like meth.

[Fuel-It!]

Originally Posted by Nugget

Is there a safety concern injecting fuel into a charge pipe right above a hot turbo?

There is always the potential for backfire with any WMI or CPI solution so that has to be managed as part of the design and control system.

[kern417]

The problem is cost. Few people want to spend the money on a HPFP compared to easier, cheaper options like meth and port injection, so even fewer tuners seriously consider developing an aftermarket solution. We have 600whp+ B58 cars with stock HPFP. There are just other ways around it that are universal and more widely accepted.

It also used to be common that HPFP could be rebuilt to flow more. Now most if not all manufacturers make sealed units that can't be modified, so that means more R&D to develop a pump from scratch which means more expensive units.

A walboro pump will never replace a hpfp. So not sure what that meant.

[F3085258]

Originally Posted by Fuel-It!

The issue isn't the low pressure pump it's the high pressure pump. We have a great solution coming soon in the form of B58 CPI.

When do you expect to release the CPI?

Any teaser on price??

[Fuel-It!]

Originally Posted by F3085258

When do you expect to release the CPI?

Any teaser on price??

We're working out the final details now. Hope to make a thread next week!

[PURE340i]

Originally Posted by baldeagleman

So without the software limiter can you do something like pure stage 2 with just JB4 + MHD BEF and no meth?

You can, but you won't boost much maybe enough where the stock turbo maxes out so it would sorta be pointless. Meth or the new CPI kit will be the best option. I have the Pure Stage 1 with meth and I'm only boosting 22 psi with my fuel trims half way maxed with the MHD BEF + JB4.

[///M248]

Originally Posted by Fuel-It!

We're working out the final details now. Hope to make a thread next week!

Any updates with this release? Looking forward to the details.

[Cringe]

Originally Posted by ///M248

Any updates with this release? Looking forward to the details.

They released it already. You can check out the details on their website.

https://www.fuel-it.com/b58-charge-pipe-injection-cpi-kit/

[E90ROXS]

Originally Posted by Cringe

They released it already. You can check out the details on their website.

https://www.fuel-it.com/b58-charge-p...ction-cpi-kit/

So you need a tune for this? I'm currently running bm3.

[Solid67]

Originally Posted by E90ROXS

So you need a tune for this? I'm currently running bm3.

Yeah if you want to get the most out of the setup, a custom tune would be advised. Additionally, you will need a controller such as a JB4 or the Split Second controller since the DME cannot control additional injectors. I would highly suggest the JB4 since it can control the injectors, but also gives you full boost control and other safety features not capable by other controllers or the DME.

[kern417]

Just wanted to add that port injection, whether it's in the charge pipe or in the actual intake ports, will pretty much have unlimited headroom. At that time, you can simply swap in a walbro inline pump(s) and daisy chain injectors as needed, as long as space allows it. A larger HPFP will still hit a limit with the OEM injectors. They can only flow so much. But for port injection, you can swap as many 1000+ cc injectors as you want to make more fuel. And they are cheap, universal components.

So again, using these are not as ideal and clean as upgrading the stock system. But most tuners know that it's too easy to run into another wall going that route, and it gets way more expensive quickly without the room to upgrade easily. Aux fueling just makes more sense.