E90Post
 


ECS BMW
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Need Advice!!



Reply
 
Thread Tools Search this Thread
      07-04-2007, 12:56 AM   #1
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Need Advice!!

Ok now please dont flame me on this. This is regarding forced induction and this is the only forum that people respond to threads faster in. So anyways on my A3 2.0T i have an ECU on it right now. But what happens is that it will go from 0-130 extremely fast without any hesitation. But from 130 on it crawls. My question is what do you think can help the top end, intake? exhaust? downpipe?

Feedback Appreciated

SoCalRS4
Appreciate 0
      07-04-2007, 12:58 AM   #2
wj4
Major General
United_States
119

 
Drives: E90 manual 335i
Join Date: Nov 2006
Location: Burbank, CA


Posts: 7,723
iTrader: (8)

Send a message via AIM to wj4
You have ECU...as in a reflash or piggback? I'd imagine that a better map up top would cure the problem, retuning it.
Appreciate 0
      07-04-2007, 01:01 AM   #3
sambonator
Samtaro!
United_States
42

 
sambonator's Avatar
 
Drives: a car
Join Date: May 2007
Location: Milky Way Galaxy


Posts: 2,542
iTrader: (6)

Better aerodynamics would help a lot at those speeds. Lowering the car would probably do the most for you in the aero department. If you have any wings, remove them.
Appreciate 0
      07-04-2007, 01:02 AM   #4
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
i have an ECU reflash by APR
Appreciate 0
      07-04-2007, 01:02 AM   #5
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Quote:
Originally Posted by sambonator View Post
Better aerodynamics would help a lot at those speeds. Lowering the car would probably do the most for you in the aero department. If you have any wings, remove them.
.. nah its a very aero dynamic car.
Appreciate 0
      07-04-2007, 02:13 AM   #6
IMJUSS2NASTY
Banned
10

 
Drives: BMW 335I MONTEGO BLUE
Join Date: Dec 2006
Location: NYC


Posts: 580
iTrader: (0)

Turbo's stopped spooling at a certain rpm. You have to get a tune that keeps the turbo spooling till redline. Alot of Evo's do that.
Appreciate 0
      07-04-2007, 03:47 AM   #7
seven_227
Lieutenant
United Arab Emirates
23

 
seven_227's Avatar
 
Drives: AW e92 335i
Join Date: May 2007
Location: Dubai


Posts: 590
iTrader: (0)

A free flowing direct and wider exhaust ill solve your problem if you are running stock exhaust. larger downpipes will even give it more power.
Appreciate 0
      07-04-2007, 03:49 AM   #8
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
yea i think the stock exhaust is way to restrictive
Appreciate 0
      07-04-2007, 03:51 AM   #9
seven_227
Lieutenant
United Arab Emirates
23

 
seven_227's Avatar
 
Drives: AW e92 335i
Join Date: May 2007
Location: Dubai


Posts: 590
iTrader: (0)

yup most turbo cars die at the top end due to the restrictive stock exhaust.
Appreciate 0
      07-04-2007, 03:52 AM   #10
chbrules
MSVConrad++
United_States
12

 
Drives: E90 2006 325i | E92 2007 335i
Join Date: Dec 2006
Location: Peaches


Posts: 777
iTrader: (0)

The A3 is so-so in aerodynamics. Pulling a .33 coefficient.
__________________
-Me
Appreciate 0
      07-04-2007, 04:28 AM   #11
bnj
Banned
13

 
Drives: e92 335i
Join Date: Nov 2006
Location: Helsinki


Posts: 1,137
iTrader: (0)

Is it quattro?
The drag increases exponentially, no wonder the acceleration slows down at high speeds. Full exhaust adds in the power dept.
Appreciate 0
      07-04-2007, 04:31 AM   #12
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Quote:
Originally Posted by chbrules View Post
The A3 is so-so in aerodynamics. Pulling a .33 coefficient.
well i wasn't comparing to a fuckin 335
Appreciate 0
      07-04-2007, 04:31 AM   #13
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Quote:
Originally Posted by bnj View Post
Is it quattro?
The drag increases exponentially, no wonder the acceleration slows down at high speeds. Full exhaust adds in the power dept.
no its FWD
Appreciate 0
      07-04-2007, 10:50 AM   #14
musc
⬇Cobbzilla lol
United_States
16

 
musc's Avatar
 
Drives: 335is DCT
Join Date: Dec 2006
Location: SE USA


Posts: 1,301
iTrader: (6)

Garage List
2004 E46 M3  [5.00]
Quote:
Originally Posted by SoCalRS4 View Post
Ok now please dont flame me on this. This is regarding forced induction and this is the only forum that people respond to threads faster in. So anyways on my A3 2.0T i have an ECU on it right now. But what happens is that it will go from 0-130 extremely fast without any hesitation. But from 130 on it crawls. My question is what do you think can help the top end, intake? exhaust? downpipe?

Feedback Appreciated

SoCalRS4
Downpipe would probably help along with some less restrictive exhaust.
__________________
E46 M3 | SMGII | OEM CSL 19s | D/A Race Software | OEM CSL Header | Dixis TI | Streamline Drop in filter | (sold)
E92 335is | DCT | JB4 | E60 Flash | BMS DCI | DPs | BMS CP | BMS OCC | ETS 5" | Stage 2 LPFP |
451/500 DJ at 104 (WR RWHP for DCT, no meth)(Current tune: Cobb V3 BQ/Wedge flash)
Appreciate 0
      07-04-2007, 11:59 AM   #15
M&M
Captain
South Africa
14

 
M&M's Avatar
 
Drives: E92 M3 Competition Pack
Join Date: Mar 2007
Location: Johannesburg, South Africa


Posts: 661
iTrader: (0)

I have the same problem. Golf V Gti. The problem is the power dies at high revs due to the K03 not being able to hold boost. A dowpipe will help a little in that area.

But the best solution is a good induction. I fitted the ATP to mine & not only did in crease the power everywhere, but the power peak shifted about 300-400rpm later.
Appreciate 0
      07-04-2007, 12:07 PM   #16
achien
AC
Canada
28

 
Drives: E90 Post Members Crazy
Join Date: May 2007
Location: Toronto, Canada


Posts: 2,378
iTrader: (0)

Quote:
Originally Posted by SoCalRS4 View Post
Ok now please dont flame me on this. This is regarding forced induction and this is the only forum that people respond to threads faster in. So anyways on my A3 2.0T i have an ECU on it right now. But what happens is that it will go from 0-130 extremely fast without any hesitation. But from 130 on it crawls. My question is what do you think can help the top end, intake? exhaust? downpipe?

Feedback Appreciated

SoCalRS4
Upgrade the engine, a lot of cars starts crawling after 130 (or less) because that is the difference between having higher hp.

Just curious, what do you dyno on your A3 2.0T with the ECU?
__________________
Your Supreme Leader
Appreciate 0
      07-04-2007, 02:44 PM   #17
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
220whp 303wtq
Appreciate 0
      07-04-2007, 02:44 PM   #18
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
Quote:
Originally Posted by M&M View Post
I have the same problem. Golf V Gti. The problem is the power dies at high revs due to the K03 not being able to hold boost. A dowpipe will help a little in that area.

But the best solution is a good induction. I fitted the ATP to mine & not only did in crease the power everywhere, but the power peak shifted about 300-400rpm later.
stupid questions but what does ATP stand for (a test pipe)?
Appreciate 0
      07-04-2007, 03:09 PM   #19
achien
AC
Canada
28

 
Drives: E90 Post Members Crazy
Join Date: May 2007
Location: Toronto, Canada


Posts: 2,378
iTrader: (0)

Quote:
Originally Posted by SoCalRS4 View Post
220whp 303wtq
That's it, you need to get at least 250whp+ (like the 335i) to accelerate comfortably above 130, the ability to pull out at top speed is the difference between the M3 and 335i (more hps).

The 303wtq will only help you during initial acceleration had hill-climb.
__________________
Your Supreme Leader
Appreciate 0
      07-04-2007, 03:10 PM   #20
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
wtf..... my 330 would pull just fine up there and it had 192whp. and what you said about the m3 is bullshit. the stock vs stock m3 has 333hp and 335 has 300. So at top speed m3 will pull harder because at top end thats hp.
Appreciate 0
      07-04-2007, 03:15 PM   #21
M&M
Captain
South Africa
14

 
M&M's Avatar
 
Drives: E92 M3 Competition Pack
Join Date: Mar 2007
Location: Johannesburg, South Africa


Posts: 661
iTrader: (0)

Quote:
Originally Posted by SoCalRS4 View Post
stupid questions but what does ATP stand for (a test pipe)?
www.atpturbo.com

I got some dyno's of before & after runs with the ATP CAI. Need to dig them up. I also have an ECU flash & DP.
Appreciate 0
      07-04-2007, 03:24 PM   #22
RaptorKTM
Colonel
United_States
69

 
RaptorKTM's Avatar
 
Drives: 1 M Coupe
Join Date: Apr 2006
Location: San Diego


Posts: 2,367
iTrader: (1)

Garage List
2011 BMW 1 M  [0.00]
hmm interesting.. thanks for the help. but im going to try turbo-back exhaust and intake and see what happens
Appreciate 0
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 09:33 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