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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > cobb stage 1 turbo lag?



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      07-13-2013, 05:30 PM   #1
rondocap
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cobb stage 1 turbo lag?

I had PPk installed previously on my N54 335ki. Throttle response was great.

I now have cobb stage 1 aggressive, and although the power is greater, I noticed that the throttle lags a bit more. This is what I mean by this:

With PPK and auto, lets say you shift into 2nd or third, and floor the gas - you get almost an immediate response. With cobb,you get an initial response and then you feel the boost coming in even stronger,almost like a second round.

I know it's likely because of the increased boost. Question is: What can I do to make the throttle response better again like the PPK?

Car is stock with drop in K and N otherwise. Will the BMW PE exhaust help with throttle response?

How about an intake? I don't want to go downpipe, at most a FMIC.
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      07-13-2013, 06:10 PM   #2
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Are you using stock or linear throttle?
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      07-13-2013, 06:11 PM   #3
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Are you running stock or linear throttle? I have pretty much instantaneous boost on Stage 1 Aggressive with stock throttling. Linear wasn't as fun to drive (although the gas mileage was significantly better).

Mods are only: Cobb Stage 1 Agg, DCIs, and a Synapse Charge Pipe/BOV.
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      07-13-2013, 07:09 PM   #4
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I'm using stock throttle.
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      07-15-2013, 01:34 PM   #5
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Quote:
Originally Posted by rondocap View Post
I'm using stock throttle.
Use the Linear throttle if you do not like the lag. I find the stock throttle a little more fun but if you want it to be more evenly distributed on the power band, I'd go with the Linear.
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      07-16-2013, 08:58 PM   #6
Fun w/N54
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could be carbon build up...how many miles on car?
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      07-17-2013, 12:01 AM   #7
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Quote:
Originally Posted by rondocap View Post
I had PPk installed previously on my N54 335ki. Throttle response was great.

I now have cobb stage 1 aggressive, and although the power is greater, I noticed that the throttle lags a bit more. This is what I mean by this:

With PPK and auto, lets say you shift into 2nd or third, and floor the gas - you get almost an immediate response. With cobb,you get an initial response and then you feel the boost coming in even stronger,almost like a second round.

I know it's likely because of the increased boost. Question is: What can I do to make the throttle response better again like the PPK?

Car is stock with drop in K and N otherwise. Will the BMW PE exhaust help with throttle response?

How about an intake? I don't want to go downpipe, at most a FMIC.
I've only noticed lag once. that was after i had my IC fitted. I use ST maps.
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