E90Post
 


TireRack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Partial throttle response



Reply
 
Thread Tools Search this Thread
      01-14-2008, 07:00 PM   #1
slubu
Never Go Full Retard
 
slubu's Avatar
 
Drives: White Lightning
Join Date: Oct 2005
Location: Agrestic

Posts: 1,851
iTrader: (2)

Partial throttle response

First off, I don't have a 335 so I don't know what the stock throttle response is. I do have a 330i, and I like that power is available without having to depress the throttle completely, and it is more of a factor of getting over 3k rpms than pushing down the pedal.

With these tunes out there, are the partial throttle responses pronounced? Please tell me if this is accurate:

- JBS2 : Yes
- V2: Yes
- Dinan: No
- Attache: Before yes, now no.

Is there a benefit in not having power at partial throttle response? I can see the gas savings, but otherwise is it a matter of preference? For example, I believe Helix recently changed it to a more linear power surge which I am not sure what it means. Maybe it is less jerky?

For someone who values "feel" of the tune more than specific numbers, this seems to be an important point. Just curious what others think about this.

Thanks.
__________________
2008 335i
slubu is offline  
0
Reply With Quote
      01-14-2008, 07:34 PM   #2
Clem
Major
 
Clem's Avatar
 
Drives: 2010 E90 M3 AW/FR ESS VT2
Join Date: Nov 2006
Location: MD

Posts: 1,209
iTrader: (3)

Send a message via AIM to Clem
With so much low end power even on a stock 335, part throttle response won't be a disappointment. Well, shouldn't be.

I'm running PROcede V1.47 and have the V2 harness in hand. 1.47 is VERY strong down low and I'm sure that V2 not disappoint. Well, shouldn't.
Clem is offline  
0
Reply With Quote
      01-15-2008, 05:43 AM   #3
TurboBullett@Ambient Thermal Management
Major
 
TurboBullett@Ambient Thermal Management's Avatar
 
Drives: 2012 Abarth 500
Join Date: Jun 2007
Location: NJ

Posts: 1,164
iTrader: (3)

Quote:
Originally Posted by slubu View Post
First off, I don't have a 335 so I don't know what the stock throttle response is. I do have a 330i, and I like that power is available without having to depress the throttle completely, and it is more of a factor of getting over 3k rpms than pushing down the pedal.

With these tunes out there, are the partial throttle responses pronounced? Please tell me if this is accurate:

- JBS2 : Yes
- V2: Yes
- Dinan: No
- Attache: Before yes, now no.

Is there a benefit in not having power at partial throttle response? I can see the gas savings, but otherwise is it a matter of preference? For example, I believe Helix recently changed it to a more linear power surge which I am not sure what it means. Maybe it is less jerky?

For someone who values "feel" of the tune more than specific numbers, this seems to be an important point. Just curious what others think about this.

Thanks.
I think you misunderstood my response as far as part throttle boost is concerned... There is still improved throttle response with the helix tune. what we changed was that under cruise conditions and very low throttle inputs the boost retains a stocklike feel and stocklike boost profile. this directly translates to better gas mileage as these little turbos have a tendency to spool right up at very low throttle inputs if you let them. We tuned in a very nice transition from the low throttle inputs(low boost) to wide open throttle(high boost) and all in all the car with the Helix tune is very enjoyable to drive. Also a note that in no way do these changes affect the wide open power outputs shown in the dyno's

we want to get the updated tune on the local guys cars and I'll let them independently comment on the subject
TurboBullett@Ambient Thermal Management is offline  
0
Reply With Quote
      01-15-2008, 06:38 AM   #4
WilyB
Captain
 
WilyB's Avatar
 
Drives: E92 335
Join Date: Jan 2007
Location: USA

Posts: 671
iTrader: (0)

Garage List
Quote:
Originally Posted by Clem View Post
... and have the V2 harness in hand.
You should dyno your car with and without the harness in your hand and post the results here.
WilyB is offline  
0
Reply With Quote
      01-15-2008, 06:41 AM   #5
boostedbavarian
......................... .........................
 
boostedbavarian's Avatar
 
Drives: to many cars too fast
Join Date: Jun 2007
Location: ON THE Cresents

Posts: 9,791
iTrader: (0)

Send a message via AIM to boostedbavarian
theres plenty of torque down low for partial throtle..
__________________
boostedbavarian is offline   Germany
0
Reply With Quote
      01-15-2008, 10:51 AM   #6
slubu
Never Go Full Retard
 
slubu's Avatar
 
Drives: White Lightning
Join Date: Oct 2005
Location: Agrestic

Posts: 1,851
iTrader: (2)

Quote:
Originally Posted by boostedbavarian View Post
theres plenty of torque down low for partial throtle..
on which tune?
__________________
2008 335i
slubu is offline  
0
Reply With Quote
      01-15-2008, 10:51 AM   #7
slubu
Never Go Full Retard
 
slubu's Avatar
 
Drives: White Lightning
Join Date: Oct 2005
Location: Agrestic

Posts: 1,851
iTrader: (2)

Quote:
Originally Posted by TTurboBullett View Post
I think you misunderstood my response as far as part throttle boost is concerned... There is still improved throttle response with the helix tune. what we changed was that under cruise conditions and very low throttle inputs the boost retains a stocklike feel and stocklike boost profile. this directly translates to better gas mileage as these little turbos have a tendency to spool right up at very low throttle inputs if you let them. We tuned in a very nice transition from the low throttle inputs(low boost) to wide open throttle(high boost) and all in all the car with the Helix tune is very enjoyable to drive. Also a note that in no way do these changes affect the wide open power outputs shown in the dyno's

we want to get the updated tune on the local guys cars and I'll let them independently comment on the subject
Thanks TT, that does make sense. Look forward to those reviews!
__________________
2008 335i
slubu is offline  
0
Reply With Quote
      01-16-2008, 03:21 AM   #8
MNR0
Private First Class
 
Drives: 335i (also own an LS1)
Join Date: Oct 2007
Location: AUSTRALIA

Posts: 152
iTrader: (0)

In stock form the off-idle response is pathetic. in 1st gear at 3000rpm is when things start happening. its almost as if the car is detuned for old farts. Personally, I hate it. If somethign could be done to lift the throttle response from idle to 2000RPM significantly that would be awesome.
MNR0 is offline  
0
Reply With Quote
      01-16-2008, 11:34 AM   #9
slubu
Never Go Full Retard
 
slubu's Avatar
 
Drives: White Lightning
Join Date: Oct 2005
Location: Agrestic

Posts: 1,851
iTrader: (2)

Quote:
Originally Posted by MNR0 View Post
In stock form the off-idle response is pathetic. in 1st gear at 3000rpm is when things start happening. its almost as if the car is detuned for old farts. Personally, I hate it. If somethign could be done to lift the throttle response from idle to 2000RPM significantly that would be awesome.
See, I agree. Do any tunes do this? Shiv? Attache? I believe it is not Dinan..
__________________
2008 335i
slubu is offline  
0
Reply With Quote
      01-16-2008, 11:38 AM   #10
cn555ic
BimmerPost Supporting Vendor

 
cn555ic's Avatar
 
Drives: 917-939-4980
Join Date: Jun 2007
Location: New York

Posts: 18,266
iTrader: (5)

Send a message via Yahoo to cn555ic
Procede definately gives you a better throttle response...I drove around in valet mod for an hour, then turned on the Procede and the difference was significant...not tiny but enormous throttle difference from the very little throttle
cn555ic 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 09:32 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