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1991 964 Turbo, 2002 Black E55, 2002 Black E55 " The Beast"- 2014 E63s
Absolutely, have it on 4 of my cars and the difference is pretty noticeable. It doesn't increase the power, it improves the throttle response, worth the money
Absolutely, have it on 4 of my cars and the difference is pretty noticeable. It doesn't increase the power, it improves the throttle response, worth the money
Interesting. I haven’t heard of sprint booster before but it looks promising. Any issues on the AMG?
Absolutely, have it on 4 of my cars and the difference is pretty noticeable. It doesn't increase the power, it improves the throttle response, worth the money
Tks for the reply C2 Turbo. Did you install it yourself on your GTS? Was it an easy installation?
Interesting. I haven’t heard of sprint booster before but it looks promising. Any issues on the AMG?
Hi
The "Sprint Booster" is looped in behind the gas pedal and only changes its characteristic curve. Also available with different adjustable characteristics.
The "Sprint Booster" is looped in behind the gas pedal and only changes its characteristic curve. Also available with different adjustable characteristics.
I never got the point though.
Kind regards.
Stenzel
Hi Stenzel,
Yes, they just intervene and modify the throttle pedal output signal to the ECM (commanded throttle). It is modifying the 5v output signal in the 0.2v to 4.6v range. The throttle pedal is likened to a variable rheostat and this device is simply another variable rheostat on top of the original one.
These are somewhat popular on the American cars that go in a straight line - Camaros, Corvettes, Mustangs, Dodges, etc. Some like them, some do not. I admit I am in the second group. There are a few companies out there making these. Vitesse is another one. There are at least one or two more but names of these are escaping me. No evidence it does anything to change trap times, it's more of a "makes me feel good" modification. This particular one does seem to have some interesting options such as security and valet. If they work, that's good.
When I was actively tuning American cars, I tried a couple of times to get them optimized on aggressive tunes, but ultimately had to give up on them as they would cause an erratic acceleration on a fine tune. A lot of the tuners I know won't recommend using them outside of a factory tune or won't tune with them installed.
For those who swear by them, I encourage them to go for it. Not going to do much harm if the device itself is well designed, and good for the aftermarket business.
Had one on my E500 and now also on my 2010 E63. Love the improved throttle response, especially when combined with a tune. Sprint Booster, don't leave home without it.
I could easily see these as a detriment on a road course when one is actively trying to feather the throttle
Hi Bish,
Yes, I agree with you as it would make the throttle pretty "twitchy" from about 20% to 60% commanded throttle. Then again, the device can be dialed back/forth to completely off. But I also believe most if not close to all users here are Straight Line Types.
i have one on my ancient 2005 stage 3 e55 , not even sure it still works as i barely drive it . i want to order one for my 2018 GTC roadster but see that the v3 has a readout or switch . where do you guys place the indicatorn/switch ? dopes the setting of the various modes interferes with using sport ,sport plus and or race settings ? what settings do you use?
On the tune, it really depends on what the tuner or tune device has modified in the data tables.
Many of the canned tunes (stage 1 and a lot of the stage 2) are doing very little except bumping boost. On these tunes, technically, this device shouldn't interfere with the tune itself, beyond just interfering with the factory throttle pedal output that it already does.
We have a PedalBox on our GTC. For daily driving it does make the nice difference. We have an iPhone app that makes it easy to adjust and disable when desired.
Thank you all for replying. There are some mixed opinion on the sprintbooster and i respect that. Will tune the car in a few months and then will decide on the sprintbooster. Stay tune for stock dyno test video on another thread soon.....
1991 964 Turbo, 2002 Black E55, 2002 Black E55 " The Beast"- 2014 E63s
Originally Posted by torquecraz
Thank you all for replying. There are some mixed opinion on the sprintbooster and i respect that. Will tune the car in a few months and then will decide on the sprintbooster. Stay tune for stock dyno test video on another thread soon.....
Tune is not going to help. Tune optimizes the AFR ratio with an increase in the boost and if you look at the tune graphs, they follow the stock ones, just more pronounced. The lag would still be there which is what SB helps with. I installed all of those myself and they are not difficult to install.
Tune is not going to help. Tune optimizes the AFR ratio with an increase in the boost and if you look at the tune graphs, they follow the stock ones, just more pronounced. The lag would still be there which is what SB helps with. I installed all of those myself and they are not difficult to install.
That make sense, the SB would help on the turbo lag. Tks C2 Turbo.
Im still gonna tune the car not for the lag but to get more hp. Just curious on how much more can this GTS get of stage 2 tune.
Thank you all for replying. There are some mixed opinion on the sprintbooster and i respect that. Will tune the car in a few months and then will decide on the sprintbooster. Stay tune for stock dyno test video on another thread soon.....
Hi Torquecraz,
Much success with the mods you have planned. Hope you keep updating with what is working well for you. Like everything, there are some better options out there than others. Due diligence is your friend!
Wouldn't a thick pad glued to the accelerator pedal be a lot cheaper?
Hi Scott,
Actually quicker reflexes would work just as well. We all get used to the amount of throttle depression we make when driving a car in which we are familiar. This device and others like it just feed the output voltage a little sooner in the first 1/4 to 1/2 throttle. If you pushed down a little quicker/faster you would get the same results. Hopefully this makes sense. That's all the device is doing. It can't do anymore. It's just a variable resistor with a steeper ramp than the variable resistor the factory put there
Here is a voltage graph that might make it clearer.
With the device in place, it provides a given voltage output a little sooner than you're used to for a given speed or RPM output. So, for example, look at the single vertical position at 1/4 throttle. From the factory, (red line) you would just be outputting slightly over 0.2V, but the device will already be delivering approx 1.0v, (blue line), and same as if you pushed down a little farther at about 1/3rd throttle. Once you are past about half throttle, the device isn't typically feeding more voltage than you are. It can't go past 4.6v (100% commanded throttle), it's just how fast you or it can get there .
The illusion here, if you have a high HP car that tends to break tires loose with aggressive throttle, this device is going to make it react and feel the same as you are throttling aggressively when you are not. Thus the fascination with it.
They can be a little finicky getting them right especially with this set up.
A little too much compensation and the car will lunch, and in extreme cases try to normalize the throttle response which makes it jump like your flooring it and then letting off, and then flooring it again. This is especially the case if you dig in off the line with the response compensation set to a high setting. Ive had them in a lot of different cars and my goto has been PedalBox. More recently, I had it in a 2021 E63S and when I got on it, that jumping is exactly what I experienced. As soon as I pulled the settings back to where it didn't do that, it became a diminishing return.
Individual results will vary but I don't bother with them anymore.
2025 Lucid Air Grand Touring, 2022 F-150, 1926 Rolls-Royce SSG roadster
Originally Posted by Acta_Non_Verba
Hi Scott,
Actually quicker reflexes would work just as well. We all get used to the amount of throttle depression we make when driving a car in which we are familiar. This device and others like it just feed the output voltage a little sooner in the first 1/4 to 1/2 throttle. If you pushed down a little quicker/faster you would get the same results. Hopefully this makes sense. That's all the device is doing. It can't do anymore. It's just a variable resistor with a steeper ramp than the variable resistor the factory put there
* * *
So it sounds like the answer is "yes." I guess even a thicker soled right shoe would work.
Another vehicle and different throttle controller on a dyno .
Different vehicles have different throttle responsiveness , some have none and some will feel like 3 seconds till it moves when the right foot puts in the request .
The bigger the delay the bigger the improvement these devices will make and why I was able to spot the flaw in the Dick Bipes white paper when disappointingly no one else did .
Big heavy truck , terrible seconds feel to the lag , the improvement could be substantial .
... Different vehicles have different throttle responsiveness , some have none and some will feel like 3 seconds till it moves when the right foot puts in the request . ...
Yes, and the M177/178 ECUs seem to employ not only strategies related to traction control, but also seem to involve some attempts at predicting what the driver wants. In race mode (and possibly other modes), it appears that the ECU will quickly deliver full ECU throttle if it sees the throttle pedal moving (being pressed) at a high rate of travel.
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