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E82 / E88 1 Series (2008 - 2013)
BMWs throw back to the iconic 2002, with a renewed form and function. The smallest car in BMW's line up but still packs a punch. Available in coupe or convertible, powered by either an inline 6 in the 128 or the twin turbo rocket sled 135.

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  #1  
Old 05-31-2013, 10:54 AM
tcesar888 tcesar888 is offline
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Location: Kaneohe, Hawaii
 
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Mein Auto: 2000 Z3M Roadster
Poor Thottle Response on 135is (Manual)

Hi Folks!

I test drove a 2013 135is (Manual) yesterday and I'm thinking of picking it up. Everythings was super, however the thottle responce seemed seemed mushy/slow. Just not "snappy/sharp"...

At a stop; I was pumping the throttle (not to the floor) to just get a feel for the action, and well, I wanted to hear the cool exhaust. But there seem to be a delay of sorts. Is this normal? Does the car need to "learn" my driving habits? Does it go away after break-in? Is there a specific software update? Or maybe I need to keep the RPMs up?

Anyway, I have searching online and reading various feedback.

Any thoughts before I buy?

Thanks in advance!
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  #2  
Old 05-31-2013, 12:35 PM
PatrickSR PatrickSR is offline
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Mein Auto: 2013 135is CB/Coral Red
I have the 7 speed DCT and there is a noticeable turbo lag when you first press on the throttle but once you continue to give it throttle it takes off like a rocket. Might be same thing you are feeling with the manual transmission. I have only 800 miles on mine so still learning its quirks.
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  #3  
Old 05-31-2013, 12:40 PM
tcesar888 tcesar888 is offline
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Location: Kaneohe, Hawaii
 
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Quote:
Originally Posted by PatrickSR View Post
I have the 7 speed DCT and there is a noticeable turbo lag when you first press on the throttle but once you continue to give it throttle it takes off like a rocket. Might be same thing you are feeling with the manual transmission. I have only 800 miles on mine so still learning its quirks.
Thanks for the info and confirmation. Maybe I just need to get a better feel for it. I'm familiar driving my Z3M, and its pretty snappy (no delay).

Maybe a simple intake system would help?

Thanks!
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  #4  
Old 05-31-2013, 01:48 PM
mr_bean mr_bean is offline
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Two things are causing this.
1. Turbo lag. Even though great strides have been made in reducing turbo lag in modern cars, it's still noticeable (and annoying).
2. Electronic throttle. Since the accelerator pedal is not directly connected to the throttle body, there is purposeful delay in throttle response to better control emissions. This was pretty damn annoying when I first got my 128. Installing a sprint booster or similar device should help.
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  #5  
Old 05-31-2013, 02:00 PM
tcesar888 tcesar888 is offline
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Location: Kaneohe, Hawaii
 
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Mein Auto: 2000 Z3M Roadster
Quote:
Originally Posted by mr_bean View Post
Two things are causing this.
1. Turbo lag. Even though great strides have been made in reducing turbo lag in modern cars, it's still noticeable (and annoying).
2. Electronic throttle. Since the accelerator pedal is not directly connected to the throttle body, there is purposeful delay in throttle response to better control emissions. This was pretty damn annoying when I first got my 128. Installing a sprint booster or similar device should help.
Great information. I was looking at those devices that improve response. Did you buy one? Is there one that most owners buy? It looks like a plug and play deal...?

BTW, I just recieved a call from the dealer. I may be driving a 135is home tonight! Whoohoo.....

Mahalo!
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  #6  
Old 06-01-2013, 04:45 AM
mr_bean mr_bean is offline
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Quote:
Originally Posted by tcesar888 View Post
Great information. I was looking at those devices that improve response. Did you buy one? Is there one that most owners buy? It looks like a plug and play deal...?

BTW, I just recieved a call from the dealer. I may be driving a 135is home tonight! Whoohoo.....

Mahalo!
No, I didn't buy one. I couldn't justify spending $300+ on a little black box that contains about $10 worth of electronics.
I have thought about building my own though.
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  #7  
Old 06-11-2013, 07:28 AM
JimMetcalf JimMetcalf is offline
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Mein Auto: 135i coupe
! suggest the Dinan stage one! I have it on my 135i w/manual 6 speed. This car is very fast! Many BMW dealers offer the Dinan tuning. It adds 60 HP and a VERY noticable boost from 1200-+ rpm!
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  #8  
Old 07-22-2013, 09:14 PM
gateli gateli is offline
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Dinan stage one

how much does it cost you to get it install the Dinan stage one?

hows the fuel economy wise?

Thank you
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  #9  
Old 07-23-2013, 06:14 AM
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bear-avhistory bear-avhistory is online now
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Best all round is the JB4. Has built in options to greatly reduce turbo lag plus adds a lot of power.
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  #10  
Old 07-23-2013, 08:19 AM
No12 No12 is offline
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You don't even have the car yet. I would say live with it a while after you get it, then decide. I wouldn't rush into anything initially.

Just a thought.
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  #11  
Old 07-24-2013, 10:52 AM
jygesq jygesq is offline
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Manual tranny cars should not have that lag, try to drive an other car with same engine & tranny. Lag is common on automatic cars but not MT cars. If you are not happy now why buy a car with defect or concern you will try to fix later.
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  #12  
Old 07-29-2013, 11:15 AM
BestCS BestCS is offline
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Quote:
Originally Posted by jygesq View Post
Manual tranny cars should not have that lag, try to drive an other car with same engine & tranny. Lag is common on automatic cars but not MT cars. If you are not happy now why buy a car with defect or concern you will try to fix later.
The lag is caused by the turbo motor not the transmission. My DCT (a manual which is computer controlled) has a slight stumble off idle.

I believe this is a common characteristic of the 4 & 6 cylinder BMW turbos. I also notice in reviews of turbos from other mfgs, the testers mention a slight turbo lag off idle.
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  #13  
Old 08-07-2013, 10:09 AM
bmw325 bmw325 is online now
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Hmm...maybe the traditional 6AT is the best transmission for this engine then. I have a 335i with the BMW performance chip (same setup as the 135is), and don't notice any lag. I came from a manual e46 325i so i was sensitive to any hint of turbo lag. I know that the dealy while the clutches engage with the optional DCT itrans n the 135i/is can feel laggy but you said you test drove a manual. See if you can find another example to drive...
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