mfissel

I know this is mostly a psychological change since depressing the gas pedal more with the stock version gives the same result, but given all the write-ups I figured it's worth the try -wouldnt be happy unless I was messging with something! When I ordered mine from partsexporter they had 5 units left for sale under the group price structure.

BlkE63AMG

I think we all feel the same about messing with something. The reason I got mine was that BMW M cars have a similar system with the sport button. It doesn't make the car faster but allows it to be more responsive (at least in the M3, M coupe/convertible). Once I used that button on the M3 there was no going back. The car felt slow when not in sport b/c the response was not there.

The SB makes a great addition to the E63 and the 7 spd tranny b/c it is so adaptive and smooth. I was originally concerned that it would be too jumpy, but not so at all. It allows you to have more power on tap more quickly for acceleration and makes the car feel more lively, without feeling rough.

Will never part with mine (and its only been 2 days). In love with the car all over again..... Best $300 I have spent recently

mfissel

Just curious Blk63AMG - did you use the 451A2 version on your car as well?

05PewterE55

Well I just checked the site and it said only 1 unit left so I had to order it. I can't wait to try it out.

BlkE63AMG

I did get the A2 version, a.k.a. AMG version. The seller 'partsexporter' asked for make and model and confirmed the proper Sprint Booster.

Prior to the SB an increase of say 25% in pedal pressure would increase the throttle and maybe drop a gear, now it drops 2 gears and holds for improved accel. I am sooooo impressed w/ the implementation of this part. I am not usually one that likes to floor it, so tapping into the power earlier suits me just fine. This car is AMAZINGLY fast.

PS I would like to give kudos to MB AMG for the new software for the E63. Makes the car so much smoother in 1st, both accelerating and stopping. Starts in 1st AT ALL TIMES and holds gears more readily for sprinting. That coupled w/ the sprint booster makes every trip fun. If anyone has not gotten the software, MAKE SURE YOU DO!!!!

mfissel

still waiting for mine to ship!

OzE55

I ordered mine!
Thanks for the GB

spyderman

Ordered mine as well for my ML 63. Looking forward to trying it out.

dragonAMG

Okay... my sprint booster arrived and I installed it today... man oh man, it's awesome!!! Exactly what the E55 needs. I hate the throttle delay these cars have and this SB definitely corrects that. Obviously this device doesn't make the car any faster... but it definitely feels like it!!!! A must have!

05PewterE55

Just received my SB and installed it in less than 5 minutes. I took the car out for a drive and oh my god what a difference. Awesome mod! I can't wipe the grin off my face. Makes me feel like the day I drove it home.

Charged55

I am definitely excited now, when will mine come in?

OzE55

I finally fitted mine. Took me 10mins. Easy just a bit awkward.

I was worried it would make the throttle 'twitchy' in stop start driving - it doesn't. I dont think there is any difference compared to standard at light throttle openings. It does sharpen up the mid throttle response very nicely. I think it makes the car easier to drive. I was expecting a more dramatic effect given some of the posts here. Its not like day and night - which is probably a good thing.
Haven't tried it for a quick get away from the lights yet.

I'm happy and recommend it. The car is more like MB should have made it.

Rafal

Which SB did you get? Is it the "AMG" model? That would explain the less aggressive light throttle map. I had the "Auto" model and it was very trigger happy from iddle! I am going to install the AMG model next.

OzE55

BDD 451A2 is the number on the box.
I assume its the AMG model as its the one from the group buy,

Skeeter

Where are you guys buying these and what do they run? I did a search for "partsexporter" and didn't find anything.

Thanks,

Skeeter

dsc

I had the exact same experience. Actually, I was a little disappointed that the car didn't buck into action when I breathed on the pedal but I agree the car is easy to drive and mid responce is better. I like it and wouldn't mind if it were more aggresive. It is now how MB should have produced the car.

OzE55

Here's a link - http://cgi.ebay.com/ebaymotors/Sprin...QQcmdZViewItem

Rafal

I took off the "Auto" model (AMG model was not available when I bought it) because it was making the car feel too "nervous" with the slightest pressure on the gas. Initially I thought it was great but after two weeks the novelty was beginning to wear out. Then came the rains and all hell broke loose...as did my rear end
That is why, this time, I ordered the AMG version which is tuned to the already more responsive AMG throttle, without going over the top.

Rafal

It is the AMG model.

por997s

Installed SB yesterday. Left the car like a total animal. In the wet could not find any grip. C mode more easier to drive. Great device!

OzE55

Thats not my experience at all. The car is perfectly driveable at light throttle openings. Either you have a very heavy right foot or installed the non-AMG sprint booster (like Rafal). Check the serial number I listed above.

Rafal

You are right. I just installed the AMG model and what a difference!
Light touch of the throttle, like reversing up the driveway, parking etc, and the car feels like it always did without the SB. Add a little more pressure and it romps away like it got an extra 200Nm.
Much easier to control than the Auto model but just as much fun.

OzE55

I'm glad you like it and greatful you talked me into it in the first place.

por997s

Just like to thank Sandoval for the excellent and detailed instructions. Installed in less than 5 mins!

Rafal

+1.
I forwarded Sandoval's excellent link to my brother in South Africa and bought him two SBs from the Partsexporter!
PS. You can skip one step: no need to unhinge the gas pedal by removing the top pin, it comes out in one complete unit just as easily!