N54 Dual HPFP

[JimboFresh206]

brazing is pretty common on diesel rails?

I dont see why it wouldn't work as long as it was done right.

My m30 has a dead end, dual feed rail thats braised and it was made at a diesel shop not a DI car but they didnt mention anything and its doing fine.

 

[The Convert]

silver brazing is pretty common on diesel rails?

I dont see why it wouldn't work as long as it was done right.

My m30 has a dead end, dual feed rail thats braised and it was made at a diesel shop not a DI car but they didnt mention anything and its doing fine.

Braze joints have no tensile strength, only shear.

 

[JimboFresh206]

The OEM joints appear to be a silicon bronze Tig braze.

this is common on diesels, look into the issues 24v Cummins have.

 

[JimboFresh206]

Wouldnt an s55 rail, with custom lines to meet the injectors be better? I know I can have the lines made at wofsco.

 

[Hydra Performance]

Trouble is the injector lines on the S55 rail are fixed, so not only would you need to make 6x lines for the injectors, but 6x welds/joints as well..

 

[JimboFresh206]

Ahh well that solves that lol, thanks @Hydra Performance

 

[NoQuarter]

Hey everyone. Just a quick update.

This project is still on and I am fully committed to it. Just had to get a few things done that will hold me over from not being able to use my hand much for a few months.

Bench results have been good but getting the pump to behave on the car is a challenge of course. I have some new things I want to test as soon as I can get back on it.

The support has been great. I know I am the bottleneck here and I am as excited to get this to work as anyone.

I got the pumps installed early anticipating this so now the electronics will be a low impact sort of work.

Cheers

 

[Jeffman]

Bummer about the hand, man!

 

[doublespaces]

I got the pumps installed early anticipating this so now the electronics will be a low impact sort of work.

Cheers

View attachment 22545

The install looks pretty rough

 

[NoQuarter]

I have been able to get back to some testing. Currently, I am now able to drive the pump with a simulated DME PWM signal while accounting for the CAM position sensor.

I am able to control the pressure by me manually altering the frequency/duty cycle and keep it around my desired target. It still tends to creep up or down (with no feedback control) but the creep is slow enough that I can adjust for it.

 

[NoQuarter]

Next task:
- Take my prototype CAM Feedback Controller and make it more suitable for in car testing
- Locate new components that will allow the controller to operate at the max possible amperage of the pumps

 

[Twisted Tuning]

I have yet to see any definitive proof that a single N55 pump is any different than a single S55 pump other than the fuel inlet / outlet location. I doubt the cam profile is different either, other than adding an extra lobe for the second pump. If cam profile were different, that is the easiest change to make anyway.

they are the same from what i saw on my pump. But i also made a custom cam to fit to these. I need to put in on my buddies car and see how much more flow i get. I've been being partially lazy, but mostly busy.

But how well do the s55 hpfp pumps handle being pushed at that level ?

Are they ok or at their ragged edge ?

Fine thus far, i've pushed E40-E85 through them from stock twins to upgraded twins. They seem to actually hold up fine in my experience.

That has me very curious how the oem put the bungs on. They look like the threaded end was micro tig’d into the bing, but the bing just looks like it was brazed on. I wonder if the bing welds are on the inside? No way braze joints are holding all that fuel pressure.

Trouble is the injector lines on the S55 rail are fixed, so not only would you need to make 6x lines for the injectors, but 6x welds/joints as well..

No need to even mess with the rail. Just use my adapter and line kits on the stock rail. done.

 

[rev210]

What about adapting this? https://store.katechengines.com/mobile/katech-xtreme-di-direct-injection-fuel-system-p631.aspx

 

[Jake@MHD]

they are the same from what i saw on my pump. But i also made a custom cam to fit to these. I need to put in on my buddies car and see how much more flow i get. I've been being partially lazy, but mostly busy.

What is it, 4 or 5 lobe? I'll be able to test one in a few weeks if you want to make an extra hah

Just use my adapter and line kits on the stock rail. done.

This is nice. What pressure is that line good for?

What about adapting this? https://store.katechengines.com/mobile/katech-xtreme-di-direct-injection-fuel-system-p631.aspx

LOL @ $5k. No need for that anyway, a few good reasonably priced solutions are in the works.

 

[Twisted Tuning]

What is it, 4 or 5 lobe? I'll be able to test one in a few weeks if you want to make an extra hah



This is nice. What pressure is that line good for?



LOL @ $5k. No need for that anyway, a few good reasonably priced solutions are in the works.

Current one is 4 lobe. 5 lobe is in design phase. But 5 lobe may not be any improvement due to needing a shorter stroke to keep from sharp angles that can stress and lock up.

But once I get some miles on it. I'll off a service of installing or a core program. Because it's not exactly easy to install.

Already have the 4 lobe fitted about to go into a client car.

Hose is 5800psi working pressure.

 

[NoQuarter]

I have been testing this very prototype looking harness on the car and we are getting a decent idle rail pressure and the pressure is following the engine revs and coming back down nicely.

This is with a single S55 pump

 

[EthanolTurbo]

2019: Year of N54 fueling

 

[NoQuarter]

No need to even mess with the rail. Just use my adapter and line kits on the stock rail. done.View attachment 24237

This is the adapter I am using - very nice

 

[NoQuarter]

Have had a few steps forward and few steps back., but overall good progress. Still running only one of the S55 pumps.
and... the tank has E30 in it which has not been accounted for.

Below is a log of the engine in a cold start and warming up. you can see initial high rail pressure on first start then settles down nicely

It was running well enough I decided to do a bit of a pull from 2,000 rpm to about 5k. The rail pressure responded as well as can be expected at this point

 

[Rcboosted2007]

Will it come to fruition?