What is a Pedalbox? - Subaru WRX Forum
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#1 Old 12-10-2013, 03:34 PM
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What is a Pedalbox?

So I've been poking around our wonderful forum today and found an ad for a "Pedalbox". Its by twm performance. I read about it because it intrigued me but I still can't figure out what it does. It says that it reduces throttle lag by boosting the electrical signal. How would this decreases throttle lag? An electrical impulse travels at a mostly fixed rate, so how can you improve it?

Can anyone explain this any better? I'm just curious to how/why it works.

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#2 Old 12-10-2013, 03:45 PM
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Seems like a gimmick to me. I've never noticed a delay in throttle response. Only time I have was with a piggy back UTEC when it switched tables from closed loop to open. Then again, I also don't have drive by wire; I have a throttle cable. Maybe someone else can answer it better. First time I've seen this.

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#3 Old 12-10-2013, 03:49 PM
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It looks like a aftermarket SI-Drive. It alters your throttle position and the DBW response. Less throttle position for more response....Don't see it being a big deal. Just makes it easier to be a lead foot.

20% gas pedal = 20% throttle body response (stock)
20% gas pedal = 35% throttle body response (sport mode)
20% gas pedal = 45% throttle body response (sport plus mode)

Something like that....it can't make your car any faster..just makes it go to WOT faster.

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#4 Old 12-10-2013, 03:53 PM
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Ah, that makes more sense. Anyone not familiar with Subaru's SI drive.

SUBARU | Subaru Technology | SI-DRIVE

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#5 Old 12-10-2013, 03:54 PM
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I kept updating my response above....lol

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#6 Old 12-10-2013, 03:58 PM
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This;
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#7 Old 12-10-2013, 04:29 PM
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^ +1 that's the best answer ever.
Still don't get why it would be "better" to have 20% pedal position be 45% throttle position. Wouldn't it be best to have it 1/1 for better control? But that's just me
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#8 Old 12-10-2013, 04:57 PM
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Its not technically better unless you're flooring it at a track day event and even then its minimum gains. Unless the normal mode is like the Intelligent mode of the SI which is less throttle per pedal for adverse conditions.

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#9 Old 12-10-2013, 08:03 PM
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I've seen a couple of these products and their descriptions are written in a way that makes it seem they are revolutionary and/or doing something mindblowing. But when you actually read into what they actually do, they are just a circuit board that can alter the accelerator electrical input to the ECU (as Kirt had illustrated above).

I first encountered this device being used on a drift car, and I can understand why it might be a useful tool. However, I find it more intriguing to dial down the throttle response rate for situations where wheel spin is highly likely (and unwanted).

I think I might have just repeated everything that Kirt mentioned...
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#10 Old 12-10-2013, 08:40 PM
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Quote:
Originally Posted by sleepr View Post
I've seen a couple of these products and their descriptions are written in a way that makes it seem they are revolutionary and/or doing something mindblowing. But when you actually read into what they actually do, they are just a circuit board that can alter the accelerator electrical input to the ECU (as Kirt had illustrated above).

I first encountered this device being used on a drift car, and I can understand why it might be a useful tool. However, I find it more intriguing to dial down the throttle response rate for situations where wheel spin is highly likely (and unwanted).

I think I might have just repeated everything that Kirt mentioned...
Well, great minds tend to think alike you know.

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#11 Old 12-11-2013, 03:10 PM
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Originally Posted by Haw1es View Post
^ +1 that's the best answer ever.
Still don't get why it would be "better" to have 20% pedal position be 45% throttle position. Wouldn't it be best to have it 1/1 for better control? But that's just me
Please don't tell me that isn't right?...Man I knew it.

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