JBSPEED/Velocity Adjustable Throttle Booster System
Technical Specs
- 4 power profiles selection, adjustable according to different driving needs
- Optimized throttle characteristics to enable immediate throttle response to the engine in real-time, resulting in faster response
- Simple plug-and-play, with no modifications
- Slim and compact design
- Unit can be powered off during driving, and powered up as needed, anytime
- Intelligent, self learning feedback algorithm to enable optimized driving
- Comes with 1 year manufacture warranty from purchase date
Mercedes
C-class (all models up to W203)
E-Class (all models including the latest W211)




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On a different note, JBSPEED how come you havent wrote back to my question?
On a different note, JBSPEED how come you havent wrote back to my question?
Ill do my best with the review , but i am tired of reading the negative comments from the people who havent even tried the SB. Its easy to make a comment, but its not a comment that other members want to hear, its a first hand review that will make other members decide if they want it or not.
Technical Specs
- 4 power profiles selection, adjustable according to different driving needs
- Optimized throttle characteristics to enable immediate throttle response to the engine in real-time, resulting in faster response
- Simple plug-and-play, with no modifications
- Slim and compact design
- Unit can be powered off during driving, and powered up as needed, anytime
- Intelligent, self learning feedback algorithm to enable optimized driving
- Comes with 1 year manufacture warranty from purchase date
Mercedes
C-class (all models up to W203)
E-Class (all models including the latest W211)





Installation –
I got home with high expectations of what this thing was going to do for me.
I grabbed a pick tool too to pry the cover off of the 5mm hex bolt.
Pull the bolt, and popped the accelerator pedal out within seconds
i popped the cable loose and connected the leading wire connector for the Velocity to the accelerator assembly
I connected the trailing wire to the car side of the wiring
I put things back in, in the reverse order of disassembly.
I found some body molding tape in the tool box. Took one strip of this stuff to make it nice and solid. 3M tape rocks! Cause it’s from Minnesota.
I think this install took ten minutes due to it being my first time pulling things apart in here and the fact I took a few pics for you guys.
I didn’t tuck wires inside panels, as I’ll need to take this out in the next few weeks because I’m taking my car in for service. When I get the car back I’ll take a few minutes to hide the wires
First thoughts –
No check engine lights or sprint booster blues running conditions that I’ve read about on this forum
In fact, nothing at all. Seemed like there was nothing new. The unit was off. I pressed the power button to be pleasantly surprised that the accelerator was very slightly different.
I needed more. By going to level 2 there seemed to be no lag in the pedal. Nice. I think this will be a great everyday mode for me.
Level three seems the most like a Sprintbooster. Like it’s amplified slightly. Good stuff.
Level 4 is crack cocaine mode. It’s kind of nuts. The car is a monster. And I totally forgot to put my car into sport mode until this point. Slide it over to sport and I’m starting to think The Tire Rack must be giving kick-backs to Velocity cause this is thing is going to be the demise of quite a few sets of tires I’m sure.






