E90Post
 


Evolve Automotive
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > 335d - VAC Motorsports Diesel Power Module for the US cars



Reply
 
Thread Tools Search this Thread
      08-06-2011, 01:27 PM   #67
e46mpwr
Private
 
e46mpwr's Avatar
 
Drives: 2009 535i, 2010 335d
Join Date: Apr 2009
Location: Los Angeles, CA

Posts: 91
iTrader: (1)

Send a message via Yahoo to e46mpwr Send a message via Skype™ to e46mpwr
Does anyone have a cold air intake on their 335d?

Quote:
Originally Posted by 335dM View Post
Cold air intake for 335d ????
__________________
2010 335d, Circuit Sports Coilovers, VAC Motorsports Diesel Control Module.
e46mpwr is offline   United_States
0
Reply With Quote
      08-15-2011, 07:31 PM   #68
Ron1n
Speed Demon
 
Ron1n's Avatar
 
Drives: '10 335d E90
Join Date: Oct 2009
Location: The 858

Posts: 3,248
iTrader: (4)

Garage List
2010 335d  [5.00]
Quote:
Originally Posted by e46mpwr View Post
Does anyone have a cold air intake on their 335d?
No such beast available as of right now.

Regarding my VAC impressions, I'd say it's a good middle of the road option. Not the most power, not the least, and it gives good gas mileage.

Regarding hotrod's results...I need to get me some DR's, because traction with the power I'm putting down is my chief problem. I'm in the 5's and low 13's on streets.
Ron1n is offline   United_States
0
Reply With Quote
      08-16-2011, 08:24 AM   #69
Thud
Throbbing Member
 
Drives:
Join Date: Jan 2008

Posts: 1,431
iTrader: (0)

Right now my car is still stock but I'm leaning toward the VAC. Assuming their claims are accurate (i.e. only the timing of the fuel injection is changed, and no additional fuel is used) it seems it won't affect the lifespan of the DPF over the long haul. I'm not looking for ridiculous gains, since the car is fun enough even in stock form.

If I got a JBD I'd probably just leave it at 65%. Also, if the JBD is telling the computer that a different amount of fuel is being used vs. what's actually being used, then it will skew the computer readings, won't it? i.e. indicated fuel economy, distance-to-empty, etc.
__________________
2011 335d / Deep Sea Blue / Saddle brown / sport / premium

Previous cars:
2008 BMW 135i / 6MT
2002 Z06 Corvette
Thud is offline  
0
Reply With Quote
      08-16-2011, 09:27 AM   #70
cssnms
Brigadier General
 
cssnms's Avatar
 
Drives: 2011 BMW 335d
Join Date: Sep 2010
Location: Murland

Posts: 3,182
iTrader: (4)

Quote:
Originally Posted by Thud View Post
Right now my car is still stock but I'm leaning toward the VAC. Assuming their claims are accurate (i.e. only the timing of the fuel injection is changed, and no additional fuel is used) it seems it won't affect the lifespan of the DPF over the long haul. I'm not looking for ridiculous gains, since the car is fun enough even in stock form.

If I got a JBD I'd probably just leave it at 65%. Also, if the JBD is telling the computer that a different amount of fuel is being used vs. what's actually being used, then it will skew the computer readings, won't it? i.e. indicated fuel economy, distance-to-empty, etc.
They are both piggybacks and I do believe the VAC and JBD operate and make power in a very similar manner, in that they both intercept the signal from the ECU to the high pressure rail sensor, in short they are signal benders. The only way to effectively modify injection timing is by reprogramming the ecu. And yes, your theory regarding skewing the computer readings is correct, but that theory applies to both. If your ecu is being told not enough fuel is being delivered then your computer is reading that your consumption is lower. Diesels make extra power by injecting more fuel which is accomplished either through increasing injection timing or increasing fuel pump pressure; more fuel being delivered translates into more power, which more often then not yields lower mpg's. That said under certain circumstances you are likely to experience better than avg fuel economy simply because your engine doesn't have to work as hard to maintain speed since it is makeing more power lower in the rpm band, which I think will make itself more evident during highway traveling.

Last edited by cssnms; 08-16-2011 at 09:35 AM.
cssnms is offline   United_States
0
Reply With Quote
      08-16-2011, 11:11 AM   #71
Ron1n
Speed Demon
 
Ron1n's Avatar
 
Drives: '10 335d E90
Join Date: Oct 2009
Location: The 858

Posts: 3,248
iTrader: (4)

Garage List
2010 335d  [5.00]
Quote:
Originally Posted by cssnms View Post
They are both piggybacks and I do believe the VAC and JBD operate and make power in a very similar manner, in that they both intercept the signal from the ECU to the high pressure rail sensor, in short they are signal benders. The only way to effectively modify injection timing is by reprogramming the ecu. And yes, your theory regarding skewing the computer readings is correct, but that theory applies to both. If your ecu is being told not enough fuel is being delivered then your computer is reading that your consumption is lower. Diesels make extra power by injecting more fuel which is accomplished either through increasing injection timing or increasing fuel pump pressure; more fuel being delivered translates into more power, which more often then not yields lower mpg's. That said under certain circumstances you are likely to experience better than avg fuel economy simply because your engine doesn't have to work as hard to maintain speed since it is makeing more power lower in the rpm band, which I think will make itself more evident during highway traveling.
The computer learns and makes adjustments, btw. When I first got my JBD, I got some crazy readings for my MPG and my distance to empty (talking it showing I was going to get 800 miles on my tank). The more I drove, the more it stabilized.
Ron1n is offline   United_States
0
Reply With Quote
      08-16-2011, 11:57 AM   #72
cssnms
Brigadier General
 
cssnms's Avatar
 
Drives: 2011 BMW 335d
Join Date: Sep 2010
Location: Murland

Posts: 3,182
iTrader: (4)

Quote:
Originally Posted by Ron1n View Post
The computer learns and makes adjustments, btw. When I first got my JBD, I got some crazy readings for my MPG and my distance to empty (talking it showing I was going to get 800 miles on my tank). The more I drove, the more it stabilized.
True, I have noted the same thing, but I still don't find that it is as reliable/accurate as it was before I instaleld the JBD, which is simply a function of how these fuel boxes operate.
cssnms is offline   United_States
0
Reply With Quote
      08-17-2011, 12:48 PM   #73
Thud
Throbbing Member
 
Drives:
Join Date: Jan 2008

Posts: 1,431
iTrader: (0)

Quote:
Originally Posted by cssnms View Post
They are both piggybacks and I do believe the VAC and JBD operate and make power in a very similar manner, in that they both intercept the signal from the ECU to the high pressure rail sensor, in short they are signal benders. The only way to effectively modify injection timing is by reprogramming the ecu.
In that case I'm not sure how to interpret the information on the VAC info page:

Quote:
Q) With more power, how does my car not consume more fuel? Will it be as reliable?

This is a logical and completely normal question from a gasoline car perspective. Know that the diesel engine is always ingesting the same amount of air per revolution as there is no throttle plate in a diesel engine. What we do is alter how and when fuel is delivered without increasing the amount of boost or fuel.
What does that mean, exactly?
__________________
2011 335d / Deep Sea Blue / Saddle brown / sport / premium

Previous cars:
2008 BMW 135i / 6MT
2002 Z06 Corvette
Thud is offline  
0
Reply With Quote
      08-17-2011, 05:32 PM   #74
cssnms
Brigadier General
 
cssnms's Avatar
 
Drives: 2011 BMW 335d
Join Date: Sep 2010
Location: Murland

Posts: 3,182
iTrader: (4)

Interesting statement. contact them and ask for clarificaion. If the module is not increasing boost to make more power it has to increase the amount of fuel being delivered at any given rpm range; its the only way diesels make more power.
cssnms is offline   United_States
0
Reply With Quote
      08-17-2011, 10:08 PM   #75
e46mpwr
Private
 
e46mpwr's Avatar
 
Drives: 2009 535i, 2010 335d
Join Date: Apr 2009
Location: Los Angeles, CA

Posts: 91
iTrader: (1)

Send a message via Yahoo to e46mpwr Send a message via Skype™ to e46mpwr
Where are you going to get your times and how often do you go? We should meet up there sometime.

Quote:
Originally Posted by Ron1n View Post
No such beast available as of right now.

Regarding my VAC impressions, I'd say it's a good middle of the road option. Not the most power, not the least, and it gives good gas mileage.

Regarding hotrod's results...I need to get me some DR's, because traction with the power I'm putting down is my chief problem. I'm in the 5's and low 13's on streets.
__________________
2010 335d, Circuit Sports Coilovers, VAC Motorsports Diesel Control Module.
e46mpwr is offline   United_States
0
Reply With Quote
      08-18-2011, 11:06 AM   #76
Ron1n
Speed Demon
 
Ron1n's Avatar
 
Drives: '10 335d E90
Join Date: Oct 2009
Location: The 858

Posts: 3,248
iTrader: (4)

Garage List
2010 335d  [5.00]
I haven't run 'officially' in a while...they're all personal times with iPhone apps (I need me a Racelogic). And yes, almost 2 years later, we still need to meet up...rofl.
Ron1n is offline   United_States
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 11:01 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST