• Sep 9, 2007

According to the makers of the Sprint Booster, in ten minutes you can halve the throttle response time at low revs if your car has drive-by-wire. They don't say exactly how it does it, except to reveal that once you've plugged the gadget in, it monitors the signal from the accelerator and provides the ECM "with a new and altered signal." Mid-range acceleration lag is said to drop to "almost zero."

The device will fit Audi, BMW, Mercedes, and VW, among other cars. Sold in England, it's claimed not to affect your insurance or MOT, but it doesn't say anything about your manufacturer warranty. Although with a 10-minute install time, it shouldn't be the least bit difficult to remove if necessary. If those milliseconds you've been losing at stop lights have really been eating at you, the surge you need will run you $330 plus tax.

[Source: Winding Road]



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  • 20 Comments
      • 7 Years Ago
      I ran some tests with and without a Sprint Booster in my SLK. I wrote a technical white paper on the results. You can download it from bipesauto.com/sprintbooster.

      The Sprint Booster is a simple amplifier that multiplies the accelerator pedal sensor signal, making the accelerator pedal more sensitive. It does not eliminate any significant delay in throttle response, nor does it greatly improve acceleration figures. It does not change the adaptive throttle control programming of electronic throttle control vehicles. It does change pedal “feel”. This change in feel is interpreted by some as improved throttle response, acceleration, and a change in adaptive throttle control programming. Considering what it actually does, it is expensive.
      • 7 Years Ago
      I have a E60525i with this little box, I love every sec of it.
      Can not live with out it.
      • 7 Years Ago
      My CLS550 has noticeable throttle latency, several people on the MBZ message board recommended this device.

      Insofar as "screwing around with the electronics"... at least they can be reset to factory, as opposed to screwing around with the mechanicals.
      • 7 Years Ago
      I drive a Passat with the 1.8 turbo and generally there is little to no lag but during some situations, there is excessive lag. Almost to the point where it could become a dangerous problem.
      • 7 Years Ago
      These guys probably modeled the Sport mode button from the current crop of M cars. All that does is "squish" the acceleration curve from the full pedal travel - let's say 3" to a shortened 1" length with the remaining 2" at the end simply being WOT.

      It wouldn't take long to write some code that would "proxy" the signal from the pedal to the ECU, then alter the output based on input.

      Cool idea though, wish I had this when I had my Audi S4. And no - it certainly had plenty of power, but yes the pedal lag was horrendous! (and in that case, no slush box nor turbo lag was involved - as the car didn't have either!).

      W
      • 7 Years Ago
      Great tip, Autoblog!

      Say, do you think this would be compatible with my Tornado air intake??
      • 5 Years Ago
      Does the Spintbooster really work?
      • 7 Years Ago
      And so these "lag' problems are now just seeing the light of day???It seems endemic and the car reviews never mention this at all.
      Great.
      seems like it will be zero-to-the-first-tree with this device.
      • 7 Years Ago
      I bet all this device does is fake the TPS. Basically, if you are at 20% throttle, it will send 50% throttle to the computer, to make your car seem faster then it actually is. But in reality, it just decreases the resolution of the throttle. 50% throttle will now be WOT.
      • 7 Years Ago
      Some manufacturer's will soon know about this device. Their on board ECM could track and record any major changes made it. Could be difficult to explain on a warranty claim.
      • 7 Years Ago
      If it works, why wouldn't car makers use it?
      • 7 Years Ago
      That's such a miniscule thing to pay $330 to fix.
        • 7 Years Ago
        Actually- I've heard of several Audi owners complaining of serious, dangerous lag. Sounds like something that should be covered under warranty.
        • 7 Years Ago
        I don't think that lag Audi drivers complain about has much to do with the drive-by-wire system though.
        • 7 Years Ago
        My 06 A4 2.0 i think has the lag you guys are referring to. Any idea what it might be, if not the throttle response? I always thought it was the CVT...
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