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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > Hybrid Turbo options and comparisons



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      10-15-2016, 09:37 PM   #441
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reply to _TB_

Volume control valve increases flow to the pump with reduced duty cycle. So, we are talking about minumum allowed duty cycle at high load. If the LPFP supplies more fuel (higher pressure) to the VCV, the duty cycle will increase for the same rail pressure. We are just putting headroom into the control.

"We have all the information in the file" does not make sense to me. I certainly have not seen the EKP map(s) - just know they are there. Who is remapping the EKP that you are aware of?
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      10-16-2016, 02:13 AM   #442
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Quote:
Originally Posted by DWR View Post
@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.
90 is approx 900 mm3/rev

Other numbers are for lpfp integrated or not, dimensions, etc...
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      10-16-2016, 02:16 AM   #443
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Quote:
Originally Posted by _TB_ View Post
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..
The CP3 is flow regulated
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      10-16-2016, 02:22 AM   #444
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The flow valve is already fully opened when I talk about hpfp limits...

If the lpfp is big enough, upping the regulated low fuel pressure will help a little for sure, but no chance to achieve that with ecu tune only...
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      10-16-2016, 04:46 AM   #445
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Quote:
Originally Posted by zackz View Post
The CP3 is flow regulated
Yes, this is what I wrote.
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      11-23-2016, 02:44 PM   #446
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Quote:
Originally Posted by zackz View Post
Currently 2~3 for approx 480 hp, but work in progress, so not the final numbers...
Any update on your car or tune?
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      11-23-2016, 03:48 PM   #447
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Quote:
Originally Posted by 335dsleeper View Post
Any update on your car or tune?
Car goes well, but we are currently trying to bring more fuel (hpfp upgrade)...
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      12-30-2016, 02:27 PM   #448
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Hi Guys,

the car is becoming extremely torquey and powerfull, but we are currently fighting against K26 hot side back pressure, which is restricting the performances in the high end area.

It seems that the 286 hp K26 hotside doesn't flow as well as the 272 hp version, even with a custom turbine...

However, the car is at this stage producing from 900 n.m up to 970 n.m of torque between 2000 and 3400 rpm, without smoke

We are now doing few more physical mods to unleash the last potential...

Stay tuned
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      12-30-2016, 03:32 PM   #449
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Quote:
Originally Posted by zackz View Post
However, the car is at this stage producing from 900 n.m up to 970 n.m of torque between 2000 and 3400 rpm, without smoke
H.O.L.Y crap 900+ Nm..

Does it make around 460BHp with the limited flow topend?

When you remap it - what do you do to the HPpump flow map?
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      12-30-2016, 04:14 PM   #450
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It s my car, amazing torque!
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      12-30-2016, 04:44 PM   #451
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Quote:
Originally Posted by _TB_ View Post
H.O.L.Y crap 900+ Nm..

Does it make around 460BHp with the limited flow topend?

When you remap it - what do you do to the HPpump flow map?
We've got around 1000 n.m on the road (better intake temps with the cold weather), and 475-480 hp, but at an engine speed as low as 3400-3500 rpm....

About the remap I don't give any information I'm sorry, but the remap is nothing without the good engine upgrades.
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      12-31-2016, 12:19 AM   #452
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Quote:
Originally Posted by zackz View Post
Hi Guys,

the car is becoming extremely torquey and powerfull, but we are currently fighting against K26 hot side back pressure, which is restricting the performances in the high end area.

It seems that the 286 hp K26 hotside doesn't flow as well as the 272 hp version, even with a custom turbine...
Based on pics I've seen, that does not surprise me. One of the reasons I have recommended to others in the States to look at european cores for hybrids.
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      12-31-2016, 01:07 AM   #453
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Quote:
Originally Posted by DWR View Post
Based on pics I've seen, that does not surprise me. One of the reasons I have recommended to others in the States to look at european cores for hybrids.
Can we determine some part numbers here for the "proper" LP Turbos that are associated with a better flowing versions?
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      12-31-2016, 01:08 AM   #454
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Here is what I have for all the M57 versions. Based on this it is the E60/61 Pre-LCI 535d with LP turbo
11657794572 that is better flowing. Correct? If so, then for US/CA one will not be able to retrofit, unless if it only the hot side, but even then the whole turbine switchover is different and that is part of the hot side. Any comments?

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Last edited by Yozh; 12-31-2016 at 01:19 AM..
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      12-31-2016, 03:28 AM   #455
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There are errors in that diagram. The E90/91 325d does _not_ use 2.5L engine - it is the same 3.0L engine as in the 330d
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      12-31-2016, 11:32 AM   #456
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A certain someone will be getting back a hybrid LP turbo from a land far away. Maybe the details will be revealed.
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      01-21-2017, 02:16 AM   #457
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E90 335D
Hybrid turbos by fb/turbo.lodz
Stock inj system

www.youtube.com/watch?v=LNLzplsRgX0
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      01-21-2017, 09:17 AM   #458
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Quote:
Originally Posted by TC-performance View Post
E90 335D
Hybrid turbos by fb/turbo.lodz
Stock inj system

www.youtube.com/watch?v=LNLzplsRgX0
What correction factor is used to get crank HP?
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      01-22-2017, 06:06 AM   #459
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.
1,3ms duration/1800bar rail/3,5bar boost
Gives ~480hp from crank
Unlimited torq ~950nm, or a bit more.

That is the max of stock fuel system with R90 cr pump.
More duration cause that the rail pressure collapses.
I have done these over a year, after I figured out, how the turbo mod should be done ...

Making the program is surely not rocket science
It just that you understand the basics.
Lamda controlled program is quite easy in fact
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      01-22-2017, 06:15 AM   #460
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tuikku is back in the house!
__________________
2011 335d 11.68 @ 125.71 mph 1/4 mile NHRA certified track
Ram Cummins with lots-o-mods
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      01-22-2017, 10:58 AM   #461
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.
Thanks

550d gives ~470hp from crank with 3,5bar boost, and ~480hp/3,6bar.
Lamda 1,1
All pollution equipments on and working.
Have not tried higher boosts.
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      01-24-2017, 10:30 AM   #462
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Welcome back, tuikku!

Haha, I thought you had given up on BMWs.
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