Here are vids explaining anything anyone shud need to know:
1. Sprint Booster review - in JK manual - but it essentially has the SAME positive results in KL Cherokee!
https://youtu.be/ethKS-GQA1U
2. Sprint Booster display demo showing it
DOESN'T just
give 100% throttle
at half pedal - it's ALL LINEAR!
https://youtu.be/8u7lIJfWc6U
NOTE: KL Cherokee Sprint Booster is NOT the floppy cable type setup shown in this demo - it is a single piece solid plastic connector adapter that plugs into the accelerator pedal and then original connector goes into it - ie. the SB is OEM connector Male at one end and OEM female at the other - and all one piece. The little control unit cable then plugs into a socket on the side of that ALL SOLID setup.
3. Sprint Booster demo - which covers its history and explains difference from Pedal Commander etc.
https://youtu.be/1EkDzsSqRg4
4. Guy with a BMW proving the Sprint Booster IMPROVES PERFORMANCE - even tho it makes no more power it enables
more effective use of the power you have.
https://youtu.be/m2EYEZlOwkA
5. How to undo the Pedal Connector - the one in this video is THE SAME as KL Cherokee connector:
https://youtu.be/vpQVubdsB9c?t=47
A couple of years ago I fitted a Sprint Booster V3 to our Oct 2014 KL Trailhawk.
Two years on it hasn't given any trouble and is working fine - we'd be lost without it - and when we turn it off ie. for Stealership visits and forget to turn it on the vehicle feels like its suddenly running on three cylinders...
I was gonna play it cagey and stay quiet about this so I would be almost certain of having a TH significantly superior to any others without a Sprint Booster, but for safety reasons alone I just can't keep quiet about it.
I fitted the then current V3 model of Sprint Booster (V3 is still the current version). It cost me USD $379 delivered from the Sprint Booster site itself (Mini Mania is the company
https://www.sprintboostersales.com/S...=1175&sc2=2046 ).
Model Number for V6 petrol KL Cherokee when I got ours was is SPRJE012 - but I note with interest that they now specify SPRJE016 for 2014 to 2019 TRAILHAWK (at the time I bought ours there was only the SPRJE012 for all KL). Their site is easy to navigate and find info.
Delivery was very quick at a week but USD $90 of the cost was freight so you'd expect it to be fairly speedy.
Info here is largely repeated from stuff I've put in the JK forum where there was already a thread about it started years ago. The first video link above is the SB reviewed in a JK.
In the SECOND video link above, there's a demo of how the SB is LINEAR - not just giving 100% throttle at half pedal!! - the one inaccuracy in that video is that the KL actually senses RATE of pedal press as well as amount - so in fact SNAPPING the pedal flat will also make the throttle snap open faster too - but in the real world driving situation it's difficult to get right and can be bloody dangerous at times when you do get it to happen. Across the board fully proportional response with SB is a dream tho.
From my post in the JK section:
It's the effect on final responsiveness and power flow that's the point of how things like Sprint Booster work in improving the driveability and feel of the car - there isn't more power but you access what's there in a more useful fashion. Sprint Booster themselves say it won't improve 0-60 times because there isn't any more power. I dispute that - they're correct about not having more power but they're wrong about improving acceleration times - because there's no way the power flow is as good with factory throttle as you get with SB turned on.
In our TH takeoff is as mild to wild as we like - but for just a standard very brusque takeoff there's actually not as much engine revving as the same or even more sedate takeoff with the Sprint Booster off - I still haven't quite come to grips with what's going on - but in addition to just giving us consistent linear throttle response all the time (THANK GOD!) - there's also a change to how the transmission behaves. Listening from outside when my wife leaves the driveway, it takes off quickly and quietly now vs before the SB when it sounded like she was standing on the accelerator and holding second gear for the first half block. I used to cringe at hearing it screaming/rasping it's arse off (ie. revving unloaded) out of all proportion to the actual speed it was taking off with - but now it just disappears down the road with an entirely proportionate growl (clearly pulling more torque and gearing properly). You hear and feel the same thing inside the car of course but it sounded worse - and now sounds better - from outside. Perhaps it's just the quicker engine response making the transmission happier or something.
I don't know if the whole thing is a happy and unintentional result caused by a basically simple signal modification - or whether the SB is actually a LOT more sophisticated than I imagined it to be and the makers are god-damned geniuses. Whichever it is, the result is bloody marvellous!!
EDITED to be more current as at December 9 2020
Sprint Booster in KL Trailhawk
