Sprint Booster review for 370z 7 speed AT

NXTAZEE

Ok, so the SB increases throttle input percentage. So then if you have it in race mode you will attain full throttle at about 75% of throttle travel. Now, if you mash the throttle down in this mode will it not reach WOT in less time? Assuming we are pressing the throttle down equally as quick in each case, it would take longer to achieve WOT in the stock setting. If this stands to reason then improved throttle response would be the result. Would it not?

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Zeto

This is it exactly!! I bought the sprintbooster with doubts but let me tell you, I am now a believer.

Westwood

its the way it should be.

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Zsteve

As one of the graphs displayed showed, this is all about voltage. At WOT there is about 5 volts, half 2.5 volts etc. So what Im thinking is the booster just adds more voltage sooner so it is imulating WOT at half throttle. I think someone said something about messing with resisters which will change voltages. Now if it is also doing some other change I dont know and if it is Im not sure what it could be at the pedal. I would be curious to drive my car then one with the booster in to see what it does.

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2010 LS3 C6 Silver coupe corvette

DIGItonium

Pretty much. I'm assuming the pedal has a potentiometer whose reference voltages vary from 0-5V. The response should be linear with pedal travel. SB pretty much alters this "linear" voltage curve with one that is adjusted with a quicker curve. The ECU is programmed with its own throttle control map that takes these reference voltage levels and apply throttle control according to numerous factors (emission, engine, environmental, safety, etc.).

With cars being so "smart" nowadays with practically full computer controls, the ECU tries to operate the engine in a manner that is the most efficient.

It's all within the programming of the system. I'm pretty sure a 3.7L engine with high compression is capable of producing more low end torque, but at the expense of other factors. It's pretty unfortunate, but I'm pretty sure that's how we get the extra 1 MPG despite having more power.

So depending on these factors, our sense of 80% pedal travel and expecting 80% throttle won't be the same all the time.

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elmz

I'm still waiting for mine to arrive and I'll do a comparison video. I think the main issue here is people keep talking about how it "just" amplifies throttle response by X amount percent. But what others are trying to say is, it shaves off the actual lag it takes for the engine to start reving from the second you pound on the throttle, AS WELL AS amplify throttle response. The fact is, when you are rolling at a very slow pace or even at idle, and floor it, the engine doesn't even begin to really rev until 2-3 seconds later, and that is with the throttle all the way down. It just doesn't wind up like it did in my 350Z, and anyone who previously owned one will know this.

I'm not sure if this has been posted before, and he maybe a member here, but he has a video displaying the lag. When I get mine, I'll do one with the SB installed so we can all "see" the difference. But if someone else who already has a SB installed wants to do it, it would save me the trouble

elmz

Hehe I forgot to link the video

http://www.youtube.com/watch?v=R6W_39sKb2s

ChrisSlicks

I'm sorry, it cannot fix this. It does not alter the ECU in any way, hence correcting any ECU lag (whatever the reason) is impossible. It only amplifies throttle response - read their information, it is very clear in this regard.

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ChrisSlicks

No. I can get my foot to the floor in 1/10th of a second (100ms), most of that time is in initiating the movement. At best you are possibly saving 0.01 seconds - not perceptible. I don't doubt that it makes the car feel more responsive in other partial throttle situations, but that is mostly perception - i.e. you got more go from a smaller movement. The problem that people like Digi are talking about isn't going to be fixed by a pedal, it is the ECU programming.

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