Hey rafal, check out JP magazine. They physically took out the throttle and then plugged it in. hxxp://www.jpmagazine.com/techarticles/electrical/154_0911_sprint_booster_plug_in_throttle_delay_eli minator/index.html

 

I just recieved 50 of these and I will be installing one on my 2 door and on my 4 door. I will let you know how it goes.

David

 

i finally got it installed!
Wow what a difference in response time....it is worth 300$ in my opinion.
I got it set on aggresive setting and i am running it with a hypertech set for regular gas.

thanks for the input

 

OK, prepared to do the install and my mitts aren't even close to being small enough to manage the top bolt of the pedal assembly or unplug anything. I guess I'll need to employ the help of a fidget to get it installed.

 

Finally have my Sprintbooster installed for a couple of weeks now. I'm pretty happy with it and it definitely makes the JK more fun to drive around town. With a manual transmission I get better throttle tip in, need to feather the clutch a lot less and it feel similar to when I bumped the idle adjust on the Superchips up to 1200 (needs to be plugged in, not at all practical).

0-60 speed I picked up about a tenth, which is only the equivalent of a couple horsepower and in reality it provides none. I'm sure if I had an appropriate gear set I wouldn't have picked up the tenth, although the throttle tip in would continue to be better and whatever fraction of a second difference it makes in getting to WOT.

Around town it feels great and immediately gives a seat of the pants feel in performance. On the highway, I didn't notice any real changes in accelerating to pass some one, although I really didn't get a chance to begin from a wide variety of rpms.

One of the thing I would really like to figure out is if the throttle pedal module is in the loop when using cruise control or if the PCM is in direct communication with the throttle body. That's always been a big frustration when using cruise control on rolling hills as there is a definitive delay in responding to engine load, which in turn leads to downshifts. Just the same, when I do downshift there is less lag and less loss of momentum which potentially helps with fuel mileage (I know Eddie posted some pretty remarkable efficiency numbers when encountering some rolling hills after installing the sprintbooster).

Anyway, I'm not sure that it's worth the dollars, but people who do a lot more stop and go driving will get the best use of it. The Sprintbooster certainly makes the best of those situations and definitely makes driving around town a lot more enjoyable. The JK just goes a lot better from a standing start with it and in turn feels like it has a lot more power. On the highway, I have some additional testing to do and need the weather to cooperate a little better to post my findings. My guess is that I'll need to be a little higher in the rpm range than I usually cruise, and that's where I'll need to start.

One last thing, is this is one upgrade the wife immediately noticed a positive difference with. No coaxing or having her get into the throttle a little harder, just out of the box feeling quicker.

 

JPop...we would be lost without you!

BTW, did you try it alone, or in combination with the Flashpaq?

 

Got one more, JPop...
Do you foresee any warranty issue with the Sprint Booster?

 

I'm using it in conjunction with the Flashpaq. They really do two very different things as far as performance and it's pretty easy to sort out the differences. In drag racing terms, one effects reaction time and the other effects ET.

 

None that I would be particularly concerned with although it would be a hell of a lot harder to hide the Sprintbooster, although easy enough to turn off.

 

Have you tried the Sprint Booster by itself? I have teh Flashpaq and there is a noticeable difference/improvement in throttle response, but the delay is still there at low rpm's. Just wondering if you know how they compare side by side?