[zackz]

Originally Posted by BionicYeti

Hi there,

Have you got a link to the pump or more information please.

http://www.realoem.com/bmw/enUS/part...&q=13518511826

[335dsleeper]

Originally Posted by BionicYeti

Hi there,

Have you got a link to the pump or more information please.

There are companies capable of modifying our stock pumps. 28-30% increase in fuel is advertised.

[Whitbread]

Originally Posted by nicklockard

Any data or updates on this 250ml/min (3.88 GPH) pre-compressor injector? What are your methanol percentages? Any surfactant? What are your set points? Progressive controller?

Look in my thread for more info . Not a massive difference, but a quantifiable difference none the less.

[TC-performance]

Hybrid turbos made by https://web.facebook.com/turbo.lodz/

Smoke Free !

[zackz]

Originally Posted by TC-performance

Hybrid turbos made by https://web.facebook.com/turbo.lodz/

Smoke Free !

Mods please?

Are you using a bigger turbine wheel from the 450 hp power level (for 472 and 486 hp runs)?

[007_e350]

Originally Posted by zackz

Mods please?

Are you using a bigger turbine wheel from the 450 hp power level (for 472 and 486 hp runs)?

How come there's no smoke on WOT ? Is dpf still in place haha ?

[335dsleeper]

Originally Posted by 007_e350

How come there's no smoke on WOT ? Is dpf still in place haha ?

Injection duration

[zackz]

Originally Posted by 007_e350

How come there's no smoke on WOT ? Is dpf still in place haha ?

We're building a 500 hp E91 335d, and I confirm that you can achieve 480-500 hp and 950-1000 n.m without smoke (without dpf), with the good parts, and a huuuuge work on the ecu tune

We are currently limited by the hpfp, nothing else....

[_TB_]

Originally Posted by zackz

We're building a 500 hp E91 335d, and I confirm that you can achieve 480-500 hp and 950-1000 n.m without smoke (without dpf), with the good parts, and a huuuuge work on the ecu tune

We are currently limited by the hpfp, nothing else....

What injectors do you use on it? What is your lambda target?

[zackz]

Originally Posted by _TB_

What injectors do you use on it? What is your lambda target?

Stock injectors, lambda 1.1

[_TB_]

Originally Posted by zackz

Stock injectors, lambda 1.1

Impressive, didn't know the original injectors could flow that much. Have you calculated EOI?

[zackz]

Originally Posted by _TB_

Impressive, didn't know the original injectors could flow that much. Have you calculated EOI?

Currently 2~3 for approx 480 hp, but work in progress, so not the final numbers...

[_TB_]

Originally Posted by zackz

Currently 2~3 for approx 480 hp, but work in progress, so not the final numbers...

OK, bigger injectors with less opening will probably give you a wee bit more room in the HPFP - though it is on it's very limit. Are you running 1800bars or higher?

[zackz]

Originally Posted by _TB_

OK, bigger injectors with less opening will probably give you a wee bit more room in the HPFP - though it is on it's very limit. Are you running 1800bars or higher?

Bigger injectors will not help in case of hpfp limit, we still have room about eoi's....

Stock injectors are big enough for almost 550 hp...

[thungchoui]

this my car:

[DWR]

Originally Posted by _TB_

OK, bigger injectors with less opening will probably give you a wee bit more room in the HPFP - though it is on it's very limit. Are you running 1800bars or higher?

Now we are on the right discussion. Higher pressure, more volume, shorter duration, higher power density. The remaps do some of this, but there is a plausibility limit on the volume control valve duty cycle % that triggers limp mode.

Upping the pressure from the LPFP seems to be an option to increase the required duty cycle, but you have to be careful not to over do it. EKP control module contains fuel maps that relate to the delivery of low pressure fuel to the HPFP. A piggyback solution is hard to implement because LPFP speed is in a feedback loop with the EKP. However, raising pressure on the return line has potential. It just needs to be implemented for short durations, at high load.

Of course, modifiying the HPFP to be able to deliver more volume is how all this is usually done. I believe one of our members is chipping away at that.

[DWR]

Originally Posted by thungchoui

this my car:

Are those WHP or crank numbers? I'm assuming crank because "corrected" numbers are often what is reported in Europe. Still, impressive.

[thungchoui]

Details:

[DWR]

Originally Posted by zackz

Hi guys,
...
Mods:
-R90 HP pump

@zackzo (or anyone) do you know how to decode the Bosch pump numbers?
For example, this is a "R90" pump: CR/CP3S3/R90/20-89S

CR is common rail. CP3 is the pump type. Don't know about the "S3".
R is the rotation direction. 90 is volume (ml/rev?).
No idea what the 20-89S represents.

Any cross reference between BMW numbers and Bosch?
Thanks.

[335dsleeper]

It says it on the back of the e60 euro pump. I just ordered one from the UK.

[_TB_]

Originally Posted by zackz

Bigger injectors will not help in case of hpfp limit

It depends on the issue you're seeing. My experience (with a different brand car, and the old CP1 pump. If too small injectors are used, the pressure will drop dramatically once you run long opening times. Shorter duration, but bigger flow helps on the pressure drop of the pump.

So small injectors @1800bar = 250 bar pressure drop
larger injectors @1800bar = 175 bar pressure drop

Perhaps the CP3 does not respond in the same manner as it is flow regulated and not pressure regulated?

..but I was running right at the edge of the capabilities with the CP1 pump..

EDIT: We actually got Bosch Motorsport to make a custom pump for us in the end. The lifespan of a CP1 running @1800bar is pretty short..

[_TB_]

Originally Posted by DWR

Now we are on the right discussion. Higher pressure, more volume, shorter duration, higher power density. The remaps do some of this, but there is a plausibility limit on the volume control valve duty cycle % that triggers limp mode.

If you're a serious remapper, you also look at the plausibility limits - especially the maximum allowed duty cycle - if you are running on the limit, and is well aware of the risks in doing so.

Originally Posted by DWR

Upping the pressure from the LPFP seems to be an option to increase the required duty cycle,

You mean lower right?

Originally Posted by DWR

but you have to be careful not to over do it. EKP control module contains fuel maps that relate to the delivery of low pressure fuel to the HPFP. A piggyback solution is hard to implement because LPFP speed is in a feedback loop with the EKP. However, raising pressure on the return line has potential. It just needs to be implemented for short durations, at high load.

You have all the information in the file - why not just do it in the remap? I've seen far to many bodge tunes where the remapper did not know how to it right, so had to use piggyback og other "external tools"

Originally Posted by DWR

Of course, modifiying the HPFP to be able to deliver more volume is how all this is usually done. I believe one of our members is chipping away at that.

Yes. More flow from LPFP is always a good thing..