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smart car Sprint Booster Power Converter is now available for the 450 model smart! This is our most popular performance upgrade for the smart car! If you can only do one upgrade, this is it!

This Sprint Booster Module is designed for the 450 model smart car (2007-below). This will fit both the left and right hand drive 450 model smart car*.

Check out our other listings for models that fit the 451 model smart car (2008-newer).

With any high performance vehicle comes equally high expectations. When you put the pedal to the metal, nothing beats the roaring sound and feeling of instant acceleration. When we were first contacted by the manufacturer of this product and we asked to give it a try.

Their claims made us a bit skeptical, but we felt we had to give it a try and see for ourselves. The claims were that this booster was designed specifically for the smart car and would enhance acceleration and response time.

Well, we installed a unit in one of our cars and were very impressed by the performance gain. "Wow! This really works!", we said. Then we met with the manufacturer, found out more information on the product line and decided to go ahead and offer the product to the smart community.

During our open house over 20 smart owners had a chance to experience this device by taking our smart madness cars for a test drive. The response was overwhelming! Orders were being placed left and right and many owners talked about making this their first upgrade to their smart car.

Now a year later we can honestly say that this should be one of the first upgrades you do to your smart car. We love our Sprint Boosters and have them on all of our smart cars. When someone comes to our shop this is the first upgrade we recommend they try. With a 30 Day Money Back Guarantee what have you got to loose? Give it a try!





Here is what Performance and Sound Magazine said about this item:


"The Sprint Booster is an aftermarket electronic module that plugs in between the accelerator pedal and the engine control unit (ECU) in vehicles equipped with an electronic throttle control (like the smart car).

Sprint Booster is an application-specific hardware based product designed specifically for cars like the smart car. This device is engineered to improve acceleration on drive-by-wire cars by continuously measuring and converting the digital signal providing the ECM (Electronic Control Module) with a new and altered signal.

In conventional throttle systems, the accelerator pedal is connected to the throttle by a cable. A smart car has an electronic throttle control systems, the accelerator pedal is connected to a sensor that sends a signal to the ECU that operates the throttle. The ECU increases or decreases throttle effort based on your accelerator pedal input, however this doesn’t always translate to instant response. Things like pedal sensitivity, stability control and traction control systems can vary on different vehicles and can also lead to larger ‘lag’ in throttle response and acceleration when its go-time. Although some cars are equipped with adaptive driving technology (which adapts to your driving style based on recent pedal use), the Sprint Booster further improves response, increase pedal input sensitivity and delivers more impressive off the line performance.

ON THE ROAD

The installation takes literally just 5-10 minutes depending on how long it takes you to dig around near your foot pedals for the proper connections, then you simply plug in the Sprint Booster between the accelerator pedal module and the harness and you’re ready to go. Your car can be restored to stock just as easily.

From what I can tell, at low revs my Z’s VQ motor responds at approximately half the time in comparison to before. It’s most notable while accelerating in 2nd and 3rd gear as there seems to be no delay in mid-range response. I also noted improved throttle response for downshifts and overtaking at highway speeds. To ensure my ‘butt-dyno’ wasn’t playing tricks on me, I clipped the Sprint Booster in and out multiple times to clearly feel the improved responsiveness and overall it made my car more fun to drive. You wouldn’t think a Nissan 350Z suffers from any throttle lag, but once this product is in place it’s noticeably evident. As soon as I step on the accelerator, it goes without hesitation.

..."




SPRINT BOOSTER, is a Plug-n-Play Performance Upgrade for your Model Year 2008 or later smart car. This is an upgrade that you can feel with normal everyday driving, not just on the track at redline like most other performance upgrades!

What is Sprint Booster?

Most cars in the 21st century have replaced the more conventional throttle cable for an ECM (Electronic Control Module) that translates how hard the pedal is pushed into electronic signals in order to provide power to the wheels.

The ETC (Electronic Throttle Control), which is also known as Drive-By-Wire, has the unfortunate downside of delayed response and subdued acceleration, which can create problems in certain situations such as up-hill starts, quick gear changes and overtaking.

Sprint Booster overcomes this throttle response delay for your smart car by providing crisp, on-tap acceleration for whenever the driver demands it.

Results

• At low revs, the engine responds at approximately half the time in comparison to before.
• The delay time whilst accelerating in 3rd and 4th gear and the engine in the mid-range, is almost zero.
• Big differences in the higher rev range.
• Improved response for down shifts and safer overtaking.
• Overall safety and more fun on the road!

The top line is Acceleration (Red in with the SB, green is without). The bottom line is MPH. The graph is in MPH over time:

The design of Sprint Booster allows for easy installation in all models, without the need to cut any wires or intervene in the automobile’s electronics (it does not affect other systems such as electronic injection, ABS, etc.).

Installation is SIMPLE*:

1. Loosen the accelerator pedal module from the floorboard.
2. Unplug the harness from the accelerator module.
3. Plug in the Sprint Booster module inline with the harness and accelerator module.
4. Re-install the accelerator module.


Here is what customers are saying about this upgrade:

"...took it out for a quick road test. the Unit made a immediate and noticeable difference the car from a standing stop now feels more like when the car would normally hit the meat of the power band. I don't find the throttle overly sensitive. It just feels more right. Much like installing a quick turn throttle on one of my race bikes."

"I would say YES there is a performance improvement since the delay in forward acceleration is removed and the car experiences much more urgent forward motion. Not just making noise and waiting. The best way to describe the feeling would be like adding a numerically higher gear to the drive line. But since were not actually changing it were not sacrificing any of the top end performance of the vehicle."

" I just had Smart Madness install a Sprint Power Booster in my car, and I wanted to tell anyone who might be interested that it really, truly, woke the car’s performance up!!

For those who may not be aware, the Smart car

uses throttle by wire instead of a traditional throttle cable from the pedal to the throttle body. The butterfly in the throttle body opens and closes with an electronic servo that picks up a low voltage signal from the throttle pedal.

The Sprint Power Booster adds additional voltage to that signal which eliminates 99% of the throttle response lag that occurs when you push the accelerator pedal down.


Even though the device does not change or re-flash the engine management computer, since it’s installation the car responds better, shifts quicker, and it takes much less throttle pedal input to get the car moving from a dead stop. Additionally, because of the aforementioned performance changes, the car performs like it’s had an additional 5 to 6 H.P. added to it. The most noticeable change that happened is when I’m climbing a hill. Before, going up a hill in third gear required a significant amount of pedal input to get the transmission to shift down into second, but now that same task only requires about ¼ throttle input and the transmission kicks down into the lower gear with very little lag time.

I highly recommend this device, and once you install one on your Smart, you will also recommend one to other owners too.

In conclusion and for the record, I do not work for Sprint or Smart Madness; I just wanted to share information about this wonderful device with fellow members and owners who might be interested in improving their car’s performance."



"Just got the Version II. It does exactly as advertised. You can feel the difference instantly. This is not a paid advertisement. So far Smart Madness has lived up to their claims." John M.

"Before I got my Version 2, I was skeptical of how the Sprint Booster really worked. I read a good number of threads of people who have tried it. It seems like a lot of people who tried it, never had any intentions of returning it.

When I had mine installed, I noticed the difference right away. it was more responsive but the big thing that makes it nice is that the car does not jump to 5th gear so quickly. So, unlike before I use to change to manual shifting at least 50% of the time I'm driving. Now, only 1-2% of the time. Definitely a different feel, and you can't just put the pedal to the metal to get the same feel. It's not the same. Believe me, I tried that before I got my Version 2.

As for gas mileage, I may have lost an amount not really measurable. I seem to be getting the same amount of miles per tank. If I drove more normally I'm sure the mileage will be the same but at least now I have the option. So, you don't get "terrible" gas mileage. You lose a little (depending on how you drive) but not enough to sell the car." Cisco C.

"Sprint Power Booser is for real!

First of all I'm not getting paid for anything...just a guy who loves performance. I purchased Version 3 since I own a 2007 600+ hp vette and loves a car to respond the way it should. All I have to say is that this little modification solved one of the 3 major flaws with the smart. Flaw 1- major lag when you push accel pedal....Flaw 2 - Slow shifts (this can be solved with remap of computer)...Flaw 3 - rocking horse feel during shifts (solved with suspension upgrade...I used h&r springs). This mod gives you instant throttle response which makes it much more fun to drive. Car "feels" like it has alot more power. Once you install it..I doubt you'll return it." .... DaveMT74 (on SCOA)

Here is what customers are saying about this upgrade:

"...took it out for a quick road test. the Unit made a immediate and noticeable difference the car from a standing stop now feels more like when the car would normally hit the meat of the power band. I don't find the throttle overly sensitive. It just feels more right. Much like installing a quick turn throttle on one of my race bikes."

"I would say YES there is a performance improvement since the delay in forward acceleration is removed and the car experiences much more urgent forward motion. Not just making noise and waiting. The best way to describe the feeling would be like adding a numerically higher gear to the drive line. But since were not actually changing it were not sacrificing any of the top end performance of the vehicle."

"Just got the Version II. It does exactly as advertised. You can feel the difference instantly. This is not a paid advertisement. So far Smart Madness has lived up to their claims." John M.

"Before I got my Version 2, I was skeptical of how the Sprint Booster really worked. I read a good number of threads of people who have tried it. It seems like a lot of people who tried it, never had any intentions of returning it.

When I had mine installed, I noticed the difference right away. it was more responsive but the big thing that makes it nice is that the car does not jump to 5th gear so quickly. So, unlike before I use to change to manual shifting at least 50% of the time I'm driving. Now, only 1-2% of the time. Definitely a different feel, and you can't just put the pedal to the metal to get the same feel. It's not the same. Believe me, I tried that before I got my Version 2.

As for gas mileage, I may have lost an amount not really measurable. I seem to be getting the same amount of miles per tank. If I drove more normally I'm sure the mileage will be the same but at least now I have the option. So, you don't get "terrible" gas mileage. You lose a little (depending on how you drive) but not enough to sell the car." Cisco C.

"All worked out well. What a difference in performance! Thanks," - Joe (supersmart.ca)

"I got V.2 and love it." " I ordered a Sprint Booster from Smart Madness. Installation took about 5 minutes (just undo 2 bolts from the accel pedal and attach the sprint booster). Took it out for a drive and the car was a lot more responsive. No more lag in the acceleration pedal.

Obviously, this doesn't add horse power to the car but it really makes a difference to me.- Logan (SunDiego on SCOA)

"Just got the Version II. It does exactly as advertised. You can feel the difference instantly. This is not a paid advertisement. So far Smart Madness has lived up to their claims." - Jon Mills

"Try It, You'll Like It!!

...I live in the Fla. Keys. We have one major road that runs the length of all the Keys, US.1 . In my town the speed limit is 45mph. So everyone is doing 50 or more. It is a four lane road with a suicide lane in the middle. Every time you pull out it is a challenge. Before I had the booster I was always worried about getting out quick enough. Now it is not an issue. Driving a Smart on this road is like playing Frogger live. I couldn't go back to this car with out it.

This is easily worth a car payment."...Krusty (on SCOA)


"... I test drove the car for several miles after installation, and I noticed it right away. When the car is underway, acceleration is smoother, with a less time lag - a desirable result on the freeway ramp or lane changing in traffic..."  09PassionCoupe (on SCOA).


We are so confident that you will love this item that we offer you a 30 day, money back guarantee. Try it out for 30 days and if you do not love it simply send it back for a refund. No questions asked!

If you have ANY questions about this product please do not hesitate to contact us at 562-961-6800.



* Please note! If you have a left hand drive 450 model smart car you will need to cut a little opening in the carpet behind the throttle pedal (nothing that can be seen) in order to plug in the module. Once the module is plugged in it will butt up against the carpet. Cut a little opening to allow the module to slide in the slot made in the carpet. Once you plug it in you will see that it is very simply and not noticeable.