i finally got to test the SB out at this AM meet......all i can say is WHOOOAAA but it aint for everybody......why do i say this, OK here is my reasoning:

-since its main purpose is to retard the brain (logistics) into thinkin' the RPM is rev'ing higher therefore eliminating the delay or "lag" that we all referring to, but in doing this it also keeps the gears from shifting meaning it holds each gear all the way to redline but if u have an AUTOMATIC (like i do) that means if u press on the gas pedal even so lightly granted it will pull like a monster but it will also hold its gear til the engine screams (basically redline) before it shifts to 2nd, 3rd or 4th.....

-let me explain, being that i have an automatic sometimes i really dont wanna pull away or race at each light or have the car JERK (neck snapping) like a monster say when i have my mother or a client in the car..... yes this SB will eliminate the "lag" that we all encounter but honestly if i really wanted to just a quick slam on the throttle does the same job!!

-now if u have a manual or SMG transmission then i will say the SB is the way to go & prob the best mod u can get or how i like to put it....BANG FOR YOUR BUCK!!!! being that it will eliminate the 2 second "lag" we all despise and u can "shift" at your leisure therefore u get the best of both worlds.....

hope this solves the myth or the urban legend of the so called SPRINT BOOSTER!!

**also, for "auto" this mod is a gas guzzler cuz its like you're constantly driving wit a lead foot**

thanx for sharing your thoughts. nice write up :thumbsup:

U guys are killin me!!! I said all I wanted was a system, wheels and maybe a drop....... and now im lookin at tryin 2 spend 6 grand in mods and can't help my self!!....it's worse than crack.... I always see other cars... Hear bout the mods and get the "itch"!!! :wacko:

Mod'n is inevitable here....


Gotta love e60.net :P :thumbsup: :cool:

Its a gas guzzler mod if u decide not to adjust your footwork :)

I hear you, man. I saved a bunch of money ordering my car by reading info on this forum and bimmerfest.

I don't even have my car yet and I looking at spending more than I saved already.

summer wheels - probably Miro M6 since I'll have an 535i xdrive
mtech aero kit
m5 mirrors
sports auto transmission box
paddle shifters
angleeye and fog light bulb replacements

Additional possibilities:
H&R springs
ACM
backup camera
front camera
almost forgot - sprint booster

nice congrats!

this is def. my next mod :cool:

For those who have sprint booster on auto....
Is it worth it? :confused:
And is there anyway to have the auto turned into the SMG transmission which has no ill effect on the car?
And does having the sprint booster change the drive in D mode only, meaning is there still a difference between the D and DS mode when u have the sprint booster installed?

I was pretty sold on buying one, but now I'm hesitant...

In reference to the original post/review, "it keeps the gears from shifting meaning it holds each gear all the way to redline but if u have an AUTOMATIC (like i do) that means if u press on the gas pedal even so lightly granted it will pull like a monster but it will also hold its gear til the engine screams (basically redline) before it shifts to 2nd, 3rd or 4th."

Will the SB prevent shifting at normal shift points if you're driving more casually? Meaning, does it always shift at redline even if your driving more gently? I have to agree that there's a time and a place for more "spirited" driving, but sometimes with my family in the car, I want to drive more conservatively and I don't want the engine to rev and shift at redline all the time. Is this what I should expect from a SB install?

I want to eliminate the dreaded fly-by-wire lag, but not if its going to cause the car to shift at redline all the time, or even if it alters the shift point and causes the car to shift at higher RPMs. For those with automatic transmissions and with a SB installed, please help. Thanks in advance!