N55 Wastegate DC% logs

RFGuy_KCCO · 07-11-2010, 02:26 PM

Quote:

Originally Posted by shiv@vishnu

Yep. Totally stock tune. The spike perfectly normal given the closing of the actual throttle blade (not available for logging at the time).

Shiv

I thought the N55 had no throttle blade, since it has Valvetronic. Is that incorrect?

shockin330i · 07-11-2010, 02:28 PM

Quote:

Originally Posted by shiv@vishnu

Quick Update:

Very productive weekend so far. Just got logging/viewing access to all the CAN channels necessary for v4 tuning logic:

-Actual dbw throttle
-Oil temp
-DME boost target
-DME actual boost before throttle blade
-Air intake temp

The CAN logic is a bit different from that of the n54 so this job was harder than expected. The scaling is also different on many of the channels which came as a surprise. But so far, I'd say we are 80% of the way to have a fully functional v4 tune for the n55. With autotuning to follow a few weeks after (firmware update only).

Shiv

I'm saving up!! I already got use to the stock power and I can't have all these tuned camaros and mustangs beating me on the tracks...

OpenFlash · 07-11-2010, 02:31 PM

Quote:

Originally Posted by BMWDude49120

I thought the N55 had no throttle blade, since it has Valvetronic. Is that incorrect?

It does indeed have a throttle blade. I've confirmed it with my own eyes. My guess is that is is required in turbocharged valvetronic applications.

Shiv

RFGuy_KCCO · 07-11-2010, 02:41 PM

Quote:

Originally Posted by shiv@vishnu

It does indeed have a throttle blade. I've confirmed it with my own eyes. My guess is that is is required in turbocharged valvetronic applications.

Shiv

Very interesting. Thanks for clearing that up for me!

335iSSA · 07-11-2010, 03:15 PM

Quote:

Originally Posted by shiv@vishnu

It does indeed have a throttle blade. I've confirmed it with my own eyes. My guess is that is is required in turbocharged valvetronic applications.

Shiv

Quote:

Originally Posted by BMWDude49120

Very interesting. Thanks for clearing that up for me!

I read somewhere that the throttle blade was there as a back-up in case the valvetronic system malfunctioned.

scottp999 · 07-11-2010, 05:35 PM

Outstanding progress Shiv. N55 owners are going to be happy soon.

D.B.S · 07-11-2010, 06:42 PM

This is good news... Now if we could only get someone to transplant a larger Twin Scroll, and have it tuned by the V4, we would have some serious power... Maybe not N54 levels of power, but something nice...

shockin330i · 07-11-2010, 09:00 PM

Quote:

Originally Posted by Army335xi

This is good news... Now if we could only get someone to transplant a larger Twin Scroll, and have it tuned by the V4, we would have some serious power... Maybe not N54 levels of power, but something nice...

I volunteer my engine for this...

D.B.S · 07-11-2010, 09:50 PM

Quote:

Originally Posted by garmboyz_nat

N55 used Borg Warner turbo, it could be K03, K04 or K24 I'm not sure.
http://www.turbos.bwauto.com/product...sGasoline.aspx

^^
Need to find out which one they used exactly, then we can cross select a more powerful twin scroll... As long as it fits in the space constraints that are present with the current turbo.

Quote:

Originally Posted by shockin330i

I volunteer my engine for this...

^^
There goes your new warranty (not that anyone who tunes/mods cares about warranty)

Once the above has been done, and a suitable turbo is selected, it's a matter of installation of said turbo, and also having Shiv Create a custom tune that will support said turbo.

BUT that may take a while, as Shiv is just creating a tune that supports the stock system, but it'll be a step in the right direction.

shockin330i · 07-11-2010, 09:59 PM

Quote:

Originally Posted by Army335xi

^^
Need to find out which one they used exactly, then we can cross select a more powerful twin scroll... As long as it fits in the space constraints that are present with the current turbo.

^^
There goes your new warranty (not that anyone who tunes/mods cares about warranty)

Once the above has been done, and a suitable turbo is selected, it's a matter of installation of said turbo, and also having Shiv Create a custom tune that will support said turbo.

BUT that may take a while, as Shiv is just creating a tune that supports the stock system, but it'll be a step in the right direction.

Well i think it would be easier to replace this single turbo than the twins on the n54.. then again i could be way wrong...

mwahlert · 07-11-2010, 10:21 PM

Quote:

Originally Posted by shiv@vishnu

It does indeed have a throttle blade. I've confirmed it with my own eyes. My guess is that is is required in turbocharged valvetronic applications.

Shiv

i've read in some bmw technical documentation that their is a throttle blade included in all valvetronic engines. it is used for idle and various other operating conditions when valvetronic is not capable of sufficiently controlling air flow.

OpenFlash · 07-11-2010, 10:24 PM

Quote:

Originally Posted by mwahlert

i've read in some bmw technical documentation that their is a throttle blade included in all valvetronic engines. it is used for idle and various other operating conditions when valvetronic is not capable of sufficiently controlling air flow.

That would make good sense. Pretty darn cool.

mra · 07-11-2010, 11:41 PM

Looks like it's a custom borgwarner turbo made for BMW - http://www.turbos.bwauto.com/press/n...=272&year=2010. Shiv, can you comment?

D.B.S · 07-12-2010, 07:25 AM

Quote:

Originally Posted by mra

Looks like it's a custom borgwarner turbo made for BMW - http://www.turbos.bwauto.com/press/n...=272&year=2010. Shiv, can you comment?

Note, they don't mention what type of custom job it is... Has anyone taken a look at the turbo yet? Taken measurements?

supracg · 07-12-2010, 07:34 AM

Quote:

Originally Posted by mra

Looks like it's a custom borgwarner turbo made for BMW - http://www.turbos.bwauto.com/press/n...=272&year=2010. Shiv, can you comment?

+1 how easy would it be to slap on a bigger turbo? Or would it need a new flange etc.?

07-11-2010, 05:35 PM	#28
scottp999 Brigadier General 133 Rep 4,764 Posts Drives: 4runner SR5 Join Date: Mar 2007 Location: MD iTrader: (2) Garage List 2007 BMW 335 [9.00]	Outstanding progress Shiv. N55 owners are going to be happy soon.
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07-11-2010, 06:42 PM	#29
D.B.S Lieutenant Colonel 30 Rep 1,748 Posts Drives: '11 X5 35i / '13 S5 Join Date: Jun 2009 Location: Deployed to Kuwait iTrader: (2)	This is good news... Now if we could only get someone to transplant a larger Twin Scroll, and have it tuned by the V4, we would have some serious power... Maybe not N54 levels of power, but something nice... __________________ BMW X5 35i: Boopie Exhaust & Intercooler, K&N Drop in Filter, JB3 (3+ psi) 2013 Dodge Challenger R/T: CAI, Catch Can, Custom Exhaust, Headers, 87MM Throttle Body, Diablo Custom 93 OCT Tune
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07-11-2010, 11:41 PM	#35
mra Private 0 Rep 85 Posts Drives: 135i Join Date: Jan 2010 Location: Australia iTrader: (0)	Looks like it's a custom borgwarner turbo made for BMW - http://www.turbos.bwauto.com/press/n...=272&year=2010. Shiv, can you comment? Last edited by mra; 07-12-2010 at 02:39 AM..
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