I know exactly how you feel. I would contact the vendor or go direct to get more information.

From my searching, what I think is that the normal one will probably have a steeper slope and is more aggressive. The new version is slightly mellower, tailor for the supercharged and modified vehicle.

If you want something more aggressive than probably the normal version is better. I have not driven the E63 yet, but if it is plenty strong and you want snap but still want the smoothness then the newer version is fine. But if you want the SB to make the car as crazy as it can, then the old version seems to be your option. Then you can use the shift mode to adjust for a mellow ride.

I opted for the new version because all I wanted was for the delay to be gone and that the car is always ready to charge so I don’t have to wonder if the car is sleeping and I need to do an initial WOT to wake it up. Worse case (happened to me once) was when I wanted to surprise my passenger for like a 2 second run, nothing really happened!! Then they are already somewhat shocked so that you can’t do another run and that previous run was like it hasn’t even down shifted completely because of the lag LOL!

 

I agree Tigerlam92. I am purchasing the Sprint Booster to optimize the low end on the 63 since it is not supercharged. I am feeling a little ill now that I learned that I ordered the mellower version which is completely opposite of what I wanted.

I have emailed the vendor and have yet to hear back. I am hopeful that they can change my order before it ships.

Worst case scenario I am hoping that perhaps someone on this board with the BDD451A on an E55 would be interested in an even trade.

 

Sandoval, you are right I received quick response from the vendor who recommended that I order the "A2" version despite having a 63 n/a motor. I am told that Sprint Booster designed the "A2" version to accomodate the higher torque associated with both the 55 and 63 models and to avoid check engine light issues due to "irregular torque behavior." Thus, I have opted for the "A2" version which vendor assures me will still provide significant improvement.

 

Yes, I've been running my SB for over a month now and wouldn't give it up. The ML63 is a great car stock but it took a lot of throttle to really get moving. The SB puts the same go right at the top of the pedal. It's awesome. I posted a photo pictorial on my install on the ML63 board. I'm sure it's not too different on the E63.

FWIW, I got the 451A, and with my AWD vehicle it's a great match. But maybe the A2 might be a good fit with the RWD 211's. I'd be curious to see the difference side by side. Good luck! (Man... I wish you guys would have done this a month ago, I'd have saved $50!)

 

is it too late to sign-up for a spring booster?

if not, then put me down for one in manual for the w203

 

i'm in too... as long as it is the manual version...

1. Jangy
2. Sandoval
3. tigerlam92
4. rlee02135
5. DSC
6. NGS_E55
7. Vader
8. MPRSEV
9. Cosm
10. Wallance
11. Midnight Kompressor

 

You need to PM me for the URL to the vendors Shopping cart. Their are less then 10 Sprint Boosters left once the 20 units are gone the GB will be over. I tried to PM you but your box is full.

 

i just cleaned out my PM box... sorry

 

Thanks Sandoval, I ordered mine.

 

Ordered

 

Wow,

I'd buy them all up and resell them at a Premium...these things are a must for our cars!

 

I just bought mine from SLKfans.com a few days ago for $270.00, no fair

 

I believe there will only be 4 or 5 left after this evening. The vendor has been very responsive so I bet the SB's will be arriving much faster then previous experiences.

 

Thanks Sandoval, I just ordered mine.

 

Very cool! I think there are only 3 left he manually changes the status.

 

I just received an email, The first batch will go out on Friday (those who ordered by Monday) The second batch will be going out the following week.

 

I guess you gotta make that BMW X5 payment somehow!!!

I wonder if I'll ever get my sprintbooster back from the Janger-heister

 

I wonder if they make the s/b for BMW's? I think they should right?

 

Eric you got a PM.... Need to find out that link.. Gonna get one for my X5...

 

Guys there is only 1 sprint booster left from the group buy 19 units have been paid for. Shipping starts Friday

PM me for the link after the last SB is sold the price goes back up to $300.

 

I might be in....have to check on my bank flow

 

Hey SANDOVAL, are you in sales? That the most SBs sold at once ever on this site. Congrats! And again thanks.

 

I am in sales but not sprint boosters... However I wish I owned the company $250 for a .25 cent part! Those margins are huge. They don't advertise in the US from what I have seen. So you can't say the margins goes towards their marketing budget.

 

Do we have to pay through paypal, or can I purchase one through my credit card? Because I've had hassles with paypal....and plan on not using it agian.

 

I used my credit card on paypal