Huge throttle response improvement - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)

E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

Reply
 
Thread Tools Display Modes
  #1  
Old 08-22-2019, 04:10 PM
Onrocksxj Onrocksxj is offline
Registered User
 
Join Date: Jul 2019
Posts: 10
Mein Auto:
2005 Z4 2.5i, automatic. I was reading this forum and I came across a performance mod called a Sprint Booster so I bought one. From what I understand, on a stock car, if you press the gas pedal to the floor and quickly release it, there is a lag time between the pedal and the throttle body so it never opens all the way before you released the pedal. With a Sprint Booster, when you press the gas, the throttle body opens "in that instant". What a difference it made in my car!!!. These 2.5i engines have some hidden getup! The ECU's interface between the gas pedal and the throttle body was really holding it back. I can't imagine what a 3.0i does with this. I fell in love with my Z4 again.

Last edited by Onrocksxj; 08-23-2019 at 05:42 AM.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 08-22-2019, 04:25 PM
Onrocksxj Onrocksxj is offline
Registered User
 
Join Date: Jul 2019
Posts: 10
Mein Auto:
I didn't mention how the interface between the engine and the transmission is more dynamic now that there's real time throttle response. More fun to drive. The 5 speed auto flows through the gears smoothly. That's all BMW!

Last edited by Onrocksxj; 08-23-2019 at 05:34 AM.
Reply With Quote
  #3  
Old 08-23-2019, 10:19 AM
RKM52 RKM52 is offline
Registered User
Location: Palm Desert, CA
 
Join Date: Aug 2017
Posts: 20
Mein Auto: 2005 Z4 3.0i
Sounds like the results that I get when using the sport button. 3.0i
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 08-24-2019, 07:27 AM
dc_wright's Avatar
dc_wright dc_wright is offline
bimmerfest Supporting Member
Location: Orlando, Florida
 
Join Date: Nov 2007
Posts: 12,578
Send a message via ICQ to dc_wright
Mein Auto: '06 Z4 3.0si, '11 128CiC
Quote:
Originally Posted by RKM52 View Post
Sounds like the results that I get when using the sport button. 3.0i
This is exactly what the sport button does. The Sprint Booster is an aftermarket sport button.
__________________
2006 Z4 3.0si Sport Package (But I'll still hang with my "homies" in the E36 forum)
Reply With Quote
  #5  
Old 08-26-2019, 03:25 PM
Onrocksxj Onrocksxj is offline
Registered User
 
Join Date: Jul 2019
Posts: 10
Mein Auto:
I love that button! I'm sure the quicker response of the throttle is harder on the drive line and that's why there's a built in lag in the pedal. I don't plan on ever turning off now that I've experienced the difference. I'm sure a 3.0i is naturally stronger without the fun button.
Reply With Quote
  #6  
Old 11-10-2019, 01:47 PM
DextertdAmstaff DextertdAmstaff is offline
Registered User
 
Join Date: Nov 2019
Posts: 4
Mein Auto:
That's actually pretty cool, and I wasn't aware of that option until going on this forum.

I own a 2008 Bmw Z4 3.0i Roadster, but mine doesn't come with the sport button. It has the option to shift gears with the padels or with the center shifter.. I did read in the manual that if you depress the accelerator to the floor it will give the car full boost? is that the same thing?

If not, where did you purchase the sprint booster?

Cheers from Chicago!
Reply With Quote
  #7  
Old 11-10-2019, 10:54 PM
Andyz4 Andyz4 is offline
Officially Welcomed to the 'Fest
Location: Orlando, FL
 
Join Date: Mar 2018
Posts: 286
Mein Auto: 2006 Z4 3.0si
If your car has an automatic you engage Sport by moving the gear selector from D to the left.
__________________
[SIGPIC]
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 11:50 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.