Drive test:
GREEN LIGHT:Wow...the throttle performs in a snapier fashion. The engine is more responsiveness when I apply the throttle pedal. The RPMs up very quickly. With the CVT tranny, seems the acceleration never will end. This performance is more notorious above 40-50 Km/hr. From a stop light, seemed to me that the engine performance acceleration is the same with the SB turned off. The accelerator pedal requires less travel force to apply and respond.
RED LIGHT: I did not notice a big differences. I need to test this setting riding on a highway, passing cars or/and climbing a road upslope,then select the Ds tranny setting to test the CVT performance.

I want to clarify: the Sprint Booster module is made to get a snapier acceleration at will (2 settings), without modify the ECU parameters and, of course, no HPs gains.

Parcial conclusion: I'm very pleased with this electronic device, the Altima is avid to accelerate faster than ever.

No, the device pretty much helps your car launch faster off the line until the ECU kicks in and shifts tables. It doesn't hold. But, the experience beyond that is one that I can't explain. The car feels a lot smoother than it did before, you'd have to try it to experience it for yourself. To me it was worth every penny.

**Hint, Hint mike410b** --> Flooring the car vs having the SB install is virtually 2 different things. Flooring the car doesn't actually give you a smoother ride nor does it launch you off the line any faster due to the CVT's slow throttle response.

I received and installed a Sprint Booster today. Easy install; the space above the accelerator pedal is a little cramped but everything disconnected and reconnected easily. In “drive” mode the SB noticeably improved the response; it didn’t totally alleviate the lag but I don’t use “drive” very much. “Sport” mode was a kick with the SB, fun but I don’t use “sport” that much either. I use manual mode most of the time and my car responded exactly how I hoped it would; the test drive was a rush!

Once upon a time I owned a Porsche and when I stepped on the gas, or turned the wheel, it responded without hesitation. So much so that I almost had to be careful of what I was thinking; the car was that sensitive! For me, it’s all about the “feel” and pressing harder on the accelerator doesn’t provide the same sensation. The effect from the SB wasn’t questionable, it was dramatic. The SB put the icing on stage II (APR ) and I can’t wait to get back into my car tomorrow.

It gets rid of the Drive-By-Wire throttle lag. The lag is bad with the CVT and the Sprint Booster eliminates the throttle lag which makes the CVT a bit snappy as compared to not having the Sprint Booster. Yes it is expensive, but to me it was worth it. Some people won't buy it but some might. I'm just saying that it does work so those of you that don't believe it, call the manufacturer and argue with them. I don't what to hash it out with people that are not going to buy it. THE SPRINT BOOSTER DOES WORK!!!!

Gets rid of all throttle lag - much MUCH faster throttle response - makes the car feel like it has at 10-15% more power (though, of course, that is really unchanged) due to the quickened throttle-engine response. I believe that this is much the same feeling that one would get with a "chip" flash. It chirps tires in 1st and 2nd without trying to do so and the backend squirms as the power is "put down" faster... Impressive for a plug-and-drive device.

Backed out of the garage & driveway, shifted to first and it was like being shot out of a cannon!!! 2nd gear was the same!!! Got to the stop sign, pulled out on the highway...and I almost immediately turned around to go back and uninstall it, as it was nearly undriveable. People joke about the car looking like a dog squatting...well if you want to make it squat, and I mean RIGHT NOW, ON DEMAND...then this is the thing that will make it do it. Anyway, I decided to take a little drive through town and find as many stop signs/lights as I could. After about 5 minutes of learning how to re-drive my car, it started to feel pretty good as I learned to control it. THE ONLY WAY I CAN DESCRIBE IT IS...ALL OF THE HORSEPOWER AND ALL OF THE TORQUE...IS THERE FROM IDLE TO 4,000 RPM. After that, there is no difference than before. You definitely have to learn how to drive this thing all over again. The lightest touch on the accelerator will launch you immediately...there is no delay. Cruising on the highway, and in the higher gears, you will notice no difference at all. Shifting is easier and much smoother...with no hesitation in acceleration/deceleration.

The SB makes a BIG difference - well worth the money. I cannot imagine any other inexpensive mod making such a profound difference in the car. You notice the difference the first time you push on the accelerator and before you even get out of the driveway. Power hits right away and the car just wants to GO. Plants your butt in the seat and puts a smile on your face. When passing (auto tranny), the RPMs come up faster and the car downshifts sooner. I will definitely have to pay a little more attention to the speedometer.

I just got back from my first ride after installing my sprint booster - First off my kick-down works fine. I gotta tell you I don't know what makes that thing tick but it's kick-***. Before I installed this I use to feel as if I had a four banger. I know just reset the computer but after a few hundred miles it was back to the same old slow take-off. After installing this, it feels like a V-8 at low speeds and take-off. This is the best $280.00 I've spent on my car. I'll write back after a few hundred miles to let you know if it gets sluggish. I'm thinking it won't because I did not reset the computer after the install.

I decided to give the sprint booster a try. I know LBV personaly and trust his judgement and I know this guys know his shit..so I figured what the heck I'll try it.
I drove over to JRP today and they were totaly cool about the sprint booster. When I asked "does this thing really work"? They all just laughed and said..JUST try it. They installed it in my car and told me to go for a 5 min drive..No deposit lol just go well see u on 5 min.

I went out and made a left onto this long street..1st gear nail it and BAM!!! holy tourqe!!! I honestly COULD not believe it so I nailed it again and into 2cnd and the car just felt ALIVE!! Most of u know I have a fast speed 6 300 whp 330 t/q . NONE of my mods (maybe the downpipe ) gave me this initial reaction that I got from this thing..
I walked in they looked at my face and all yelled out "TOLD U SO!!" I didnt even bother asking them to take it out they left it in and I just paid.

Honestly I went in closed minded about this product after reading all the negetaive posts in the original thread but I promise u this thing works..TRUST me ( I don't get anything for this I just want to share a good product for fellow speed 6 owners). I want to thank LBV for this one personaly!
BTW- Jrp told me that I have 30 days MONEY back gauranteed!! If I decide I don't want it..they offered to take it out and go for a back to back test drive but I said no way..
I highly recomend this to everyone here. On another note I will be completly honest with u and tell u that on the highway and or higher gears you DON'T feel it nearly as much as u do in 1st and 2cnd gear but you do still feel it. It makes the car a much better and easier car to drive as a daily driver in the real world..imho

I won't review the install there are other posts with that info. I will say its easy and the hardest part is laying on the floorboard.
I noticed an immediate difference in the throttle response. I would say this has the most effect in the zero to 1/2 throttle position. It makes the car feel more responsive, a lot more responsive! I run it on its highest(red) setting. I tried green and didn't like it as much. there are three settings off, green and red as denoted by a light on the little wired switch. It feels as far as throttle response goes at low speeds like it lost 500 pounds off the car weigh. For me it makes starting from a stop much easier as I don't bog the car as I let out the clutch. I mention this benefit because I've never read it in a review of this before and to me it is very pronounced. Between taking the clutch assist spring off and this mod I feel like my clutch and throttle response is much more linear and easier to modulate. It makes my launches that much smoother.
I know this does not make my car have any more horsepower so it won't make it faster. I find however that my throttle application between shift is faster and as such I feel I accelerate faster. I DO NOT have empirical data to support that. I've never run my car at the track so I don't have 1/4 times to back it up. If I ever get to a track I will test it both on and off.
The other thing I notice is when cruising on the highway say in 4th or 5th gear turning 2000 rpms or so if I give it some gast it responds better and I don't need to downshift as much to get it to respond. I think this is because it only seems to effect the first half of throttle application and really effect the first 1/3 or so of throttle travel and since the throttle is barely open at 2000 rpms or so it "jumps" better with the Booster installed. I know "jump" is a relative term at 2000 rpms and to really make it jump slamming it down a gear or two is a real "jump"
I am perfectly happy with the $300 bucks I spent on it and will not exercise my 14 day money back guarantee. I got it from Neal at Corvette Mods and he told me they have never had any returned. Please keep your questions and comments civil, especially if you have never driven a car with one installed.