BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      11-16-2012, 12:57 PM   #1
SunnyD
Major
SunnyD's Avatar
United_States
452
Rep
1,287
Posts

Drives: M4 GTS
Join Date: Dec 2006
Location: Long Beach, CA

iTrader: (0)

JB4 RPM Jumping...Clutch Slip?

Ever since I installed my JB4, the RPMs will jump for a second between half and full throttle before accelerating. I don't think it's related to wheel spin since I don't hear anything out of the ordinary.

Could this be a sign of my clutch slipping? I notice it happening in 3rd gear on. Only mods are BMS DCI and I'm running map 1.

Thanks!
__________________
'16 ///M4 GTS
'11.75 ///E90 M3 ZCP | DCT
'06 ///M5 | SMG - Gone
'98 ///M3 | 5MT - Gone
'07 ///M Coupe | 6MT - Gone
Appreciate 0
      11-16-2012, 02:33 PM   #2
Spoolin Montego
Captain
Spoolin Montego's Avatar
595
Rep
869
Posts

Drives: 16 m3/20 x5m/23 m3
Join Date: Mar 2012
Location: Orange County

iTrader: (1)

How many miles on your car? It could also you're not used to how the turbo spools with increased boost.
Appreciate 0
      11-16-2012, 02:35 PM   #3
SunnyD
Major
SunnyD's Avatar
United_States
452
Rep
1,287
Posts

Drives: M4 GTS
Join Date: Dec 2006
Location: Long Beach, CA

iTrader: (0)

Car has 39k miles. You might be right about me not being used to the turbos spooling since this is my first turbo car. Would going with catless DPs help the turbos spool faster?
__________________
'16 ///M4 GTS
'11.75 ///E90 M3 ZCP | DCT
'06 ///M5 | SMG - Gone
'98 ///M3 | 5MT - Gone
'07 ///M Coupe | 6MT - Gone
Appreciate 0
      11-16-2012, 03:25 PM   #4
alexmtl_135i
First Lieutenant
31
Rep
371
Posts

Drives: 2013 C63 Coupe P31
Join Date: Oct 2011
Location: Montreal, Canada

iTrader: (0)

If your RPMs raise then it means the turbos have already done their job at this point.

Either clutch or tires slip, but in 3rd gear that sounds a little hard to make the tires slip.
Appreciate 0
      11-16-2012, 03:28 PM   #5
Spoolin Montego
Captain
Spoolin Montego's Avatar
595
Rep
869
Posts

Drives: 16 m3/20 x5m/23 m3
Join Date: Mar 2012
Location: Orange County

iTrader: (1)

Quote:
Originally Posted by SunnyD View Post
Car has 39k miles. You might be right about me not being used to the turbos spooling since this is my first turbo car. Would going with catless DPs help the turbos spool faster?
Downpipes definitely help them spool faster. Sometimes I feel like my clutch is slipping by the way it drives, but it's not yet. I drive it pretty hard too and mine holds good at 48k. You should have a lot more miles on that clutch with just intake and tune.
Appreciate 0
      11-17-2012, 02:06 AM   #6
AJundEinser
Beast Mode
AJundEinser's Avatar
Germany
20
Rep
19
Posts

Drives: 2008 135i Dinan S2
Join Date: Oct 2012
Location: Germany

iTrader: (0)

Garage List
2008 BMW 135i  [0.00]
Quote:
Originally Posted by SunnyD View Post
Ever since I installed my JB4, the RPMs will jump for a second between half and full throttle before accelerating. I don't think it's related to wheel spin since I don't hear anything out of the ordinary.

Could this be a sign of my clutch slipping? I notice it happening in 3rd gear on. Only mods are BMS DCI and I'm running map 1.

Thanks!
If you are gripping on tires and clutch... are you feeling the pull when the RPMs slam upward??? If so, you just arent used to the turbo lag/boost. Keep checking to see about when you see it jump... remember where you are supposed to feel the boost! If it's happening at the right spot you can sleep peacefully!
__________________
2008 135i - M sport - Dinan S2, OC, AB exhaust, BMS DCI
Appreciate 0
Post 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



All times are GMT -5. The time now is 11:09 PM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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