That is true with the pedal, but response time is different. I honestly don't now how you can say that you wnt more resonse by going 3/4 pedal instead of 1/2 pedal day to day. Sprintbooster is legit, as i had it in me e55 and was cheap on ebay new. The e55 was an 05 though.

Its just expensive since the z is a new platform. Wait in a couple of years or search the FS ads and you may get lucky in a year or so.

you gotta try it to understand, tell me why then when i smashed the pedal i barely spin in stock mode and with that thing on race its goes side ways? and never in life youl have the feelin of a Z in your prius :p

Read the description of the product, all it does is simply change the throttle position. Let's assume you put your foot 50% down, instead of opening the throttle at 50%, they open it at 75%. How is that changing power? You can do the same thing by hitting the gas pedal harder.

in a way your right cossie1600 but your still going to have throtle lag if you open it 75-100% stock.
and Awarded "Best New Product" at SEMA 2009

taken from their web site.

What happens in your 370Z when you hit the gas?

Usually, you get a full second of delay before you start moving. Sprint Booster eliminates this... you get a quicker acceleration from a stop.

The Sprint Booster is engineered to enhance the driving experience by providing increased acceleration time (eliminating delay) on drive-by-wire cars by continuously measuring and converting the digital signal and providing the ECM (Electronic Control Module) with a new and altered signal for much quicker response. The Sprint Booster improves response, increases pedal input sensitivity and delivers more impressive off the line performance you can really feel.

http://img688.imageshack.us/img688/6286/graphc.jpg

so what is the difference with blitz throttle controller?

Tip in/throttle plate openings are controlled by the ECU, not the pedal. The problem still lies within the ECU mapping, not the actual throttle itself. I am not saying the unit doesn't work (in changing how linear your throttle is), but you might want to look into ECU tuning instead.

so that's mean, functionality of the blitz and the sprint are almost similar...

is how much you press your pedal...

am i right?

ive read on the bmw/350z sites from people with tunes still having this problem so whats the deal?

I have an Uprev tune and still have the delay issue.

A tune cannot solve the inherent delay with DBW. While datalogging on my Evo, I found there was always a delay between the ECU sending the signal to open the throttle plate, or at least acknowledging that it had sent the signal, and the throttle position sensor actually registering the change. A device like this that actually adaptively ramps the throttle opening rate based upon your initial "punch" is a good way to compensate for this lag.

I know people are saying a tune can accomplish the same thing, but it simply cannot without re-writing ECU code or compromising driveability. I've messed around with DBW throttle tables on the Evo X extensively - you really don't gain anything over the stock settings. In fact, it consistently makes the car drive worse if you mess with the throttle tables too much, especially on a quick-spooling turbocharged car.

That said, I'd need to play around with a Sprint Booster on my Evo to make any fair judgment. It may really not do anything more than playing around with the throttle tables - it depends on whether it's actually "intelligent" or adaptive in any way.

by continuously measuring and converting the digital signal and providing the ECM (Electronic Control Module) with a new and altered signal for much quicker response so there's gotta be something more than just a diod or what ever it is that gives the signal to the ecu to have a better response and less lag?

Well for one it isn't even a digital signal, it is an analog signal at that point. There is no intelligence to this device, it does not connect to CAN or OBDII or anything except the pedal control unit itself. It is simply built to boost all pedal output voltages in the mid range depending on the "mode". The only lag it reduces is the speed of your right foot.

What I suppose it may do is some form of fuzzy logic on the throttle input signal. It may "learn" based upon what it supposes you're trying to accomplish - be it a quick 0-60 sprint, free-revving the engine, or easy highway cruising trying to save some gas.

Some basic calculus on the past x seconds of throttle input voltage could tell this little device quite a bit.

Who knows?

logically if it was that simple i think there would be a ton of companies trying to sell knock off's on ebay but thats not the case. the only competition out there is BLitz and its even more expensive. someone needs to buy one and tear it apart lol

From watching the videos and reading the descriptions I'm pretty certain that neither the SprintBooster or the Blitz have any intelligence. One video just shows a driver holding the throttle at a fixed position and then it progressively revs higher as he changes modes. This confirms that it is simply increasing voltage by a fixed percentage when the input is in a certain range.

I do have to congratulate Mini Mania on slick packaging and good marketing. Some people certainly like the feel of the more aggressively mapped pedal, and the fact that they are able to sell these at this price is impressive. I'm sure there will be a Taiwanese knockoff hitting the streets in a year or two for $99.