Sprint Booster for the 2015 Genesis 5.0

[carguy75]

My goodness. Some of you (Suburbazine) are taking this a bit far.

As mentioned, the Sprint Booster makes the Genesis throttle more responsive especially at speed. Nuff said. Yes, some of you are going to skeptical, but the device works as advertised regardless of theories and personal opinions about it effectiveness.

The engine does not gain additional power with the Sprint Booster, but my Genesis does react quicker due to a reduction in the time needed to reach full throttle which varies depending on the driver's foot reaction time and control. The reduction in time can be a few 1/10th due to a quicker start time compared to the stock throttle calibration like many other tested cars with a Sprint Booster available on YouTube.

Like MoonDoggy-X mentioned, the Sprint Booster really wakes up this engine and make it more competitive for drag racing and/or full out sprints. If anyone do not believe the stated observations then save your money. I give up trying to convince anyone that it works. Simple, If you want a quicker Genesis buy the Sprint Booster module. If you expect someone to provide extensive testing to sway you of its effectiveness then do not buy it. Nothing more to say on my part.

 

[mky]

Today I installed my Sprint Booster. The unit actually reduced the throttle by wire lag completely in all my drive modes. My ECO and NORMAL drive modes feel like my stock SPORT mode on the Sprint Booster RACE mode settings, actually they may be a bit more responsive than the stock SPORT mode. SPORT mode feels more like a RACE mode now with the Sprint booster set to RACE mode. The car is scary fast when using Sprint Booster Race mode while in the car's SPORT mode. Hell, NORMAL mode surprised me at first with the SPRINT BOOSTER set to RACE mode.

I actually now understand why Hyundai puts the gradual delay in the electronic throttle system, because the 5.0 engine is a real 420 hp beast when fully unleashed which could be very dangerous if the throttle was set this sensitive all the time. Gas mileage also take big hit in the wrong direction as well with Sprint Booster set to RACE mode. The Sprint Booster takes the leash off the engine initial output. Well worth the price for anyone that wants to make their 5.0 quicker without modifying the engine.

I also like that I can turn the Sprint Booster on and off with a simple press of a button.

I will give some more feedback and some acceleration tests as time goes.

Here is the Sprint Booster part number and box contents.




The installation is simple, just unplug the throttle connector and then plug the Sprint Booster inline between the gas pedal and throttle connector.







The Sprint Booster controller mounted. The controller has two modes-Sport(Green LED color) and Race(Red LED color) with 9 levels of settings. I just use level 9 on the RACE mode.

Hi Thanks for the pics. I just bought the module but i spent 2 hours just to yank the connector. It is at such an odd place that no matter how much i try i cannot get it out. Finally i tried to remove the nuts at the bottom and to left. I can see that u did not remove the bolts. I am sure if i can remove both of them i can easily install it but i spent a lot of effort to get the left nut out but the drill is bulky and not able to latch onto it. I gave up after 2 hours

 

[carguy75]

I went for a drive. The throttle behaves a little different when running. The throttle position still topped out at 85.5%, but I did not have to press the pedal to get there. With the sprint booster on Sport +9, I hit the 85.5% throttle with the pedal only pressed 75% of the way down.

I missed this post earlier. Thank you for testing the Sprint Booster with some data. I never got a chance to really test it since the cops has been cracking down on speeders and aggressive drivers in my area the past few months.

So it seems that 85 percent is the maximum throttle opening and the Sprint booster just opens it quicker than stock by requiring less pedal input.

 

[carguy75]

Hi Thanks for the pics. I just bought the module but i spent 2 hours just to yank the connector. It is at such an odd place that no matter how much i try i cannot get it out. Finally i tried to remove the nuts at the bottom and to left. I can see that u did not remove the bolts. I am sure if i can remove both of them i can easily install it but i spent a lot of effort to get the left nut out but the drill is bulky and not able to latch onto it. I gave up after 2 hours

The wiring harness is easy to remove. I believe it just has a push tab that releashes a clip. You have to push the tab in and then pull on the connector to release it, however it is in an awkward location so you may have do some yoga moves to get a good grip on it.

 

[NSXNEXT]

Gonna give this a shot. I'll just make my own. Will have to play with different thicknesses until I get it to not activate kickdown on WOT.

Found it here.
BMS Downshift Blocker for BMW

 

[Cali Gen]

Gonna give this a shot. I'll just make my own. Will have to play with different thicknesses until I get it to not activate kickdown on WOT.

Found it here.
BMS Downshift Blocker for BMW

keep me posted on this

 

[carguy75]

Gonna give this a shot. I'll just make my own. Will have to play with different thicknesses until I get it to not activate kickdown on WOT.

Found it here.
BMS Downshift Blocker for BMW

Cool. However, how would this affect everyday driving if you never can activate the kick down for passing or pulling hills?

The kick-down switch is bad for 0-60 times, but it does work pretty well for high speed passing in real world driving by dropping gears. However, i may buy some thing like this for the drag strip for some good 0-60 times without triggering the kick-down by mistake at the start light.

 

[edizzle89]

Cool. However, how would this affect everyday driving if you never can activate the kick down for passing or pulling hills?

The kick-down switch is bad for 0-60 times, but it does work pretty well for high speed passing in real world driving by dropping gears. However, i may buy some thing like this for the drag strip for some good 0-60 times without triggering the kick-down by mistake at the start light.

you dont have to have the pedal hit the kick down switch for it to drop a gear, the ecm controls that based on engine load. if you're commanding enough throttle at a lower rpm in a high gear it will drop down

 

[Flarfignewton]

Correct, the only difference is that the kickdown will downshift to the lowest possible gear whereas if you press the pedal down to just before the kickdown it may be a gear or two higher.

 

[mky]

Hi Thanks for the pics. I just bought the module but i spent 2 hours just to yank the connector. It is at such an odd place that no matter how much i try i cannot get it out. Finally i tried to remove the nuts at the bottom and to left. I can see that u did not remove the bolts. I am sure if i can remove both of them i can easily install it but i spent a lot of effort to get the left nut out but the drill is bulky and not able to latch onto it. I gave up after 2 hours

Update: Removed the whole gas pedal to access the throttle connector on the top. I was wrong, I could have removed it without removing the pedal. There is a small tab that needed to be pushed to disconnect it but given its weird location, I had a tough time just to reach that area and of course you cannot pull something away from your body
I put in the sprint booster and I notice a huge difference in acceleration. I tried both sport and race modes and to me, the race mode is better. I did not use the Sport mode with race mode. I use it with normal mode and it is blazing fast.

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[carguy75]

Update: Removed the whole gas pedal to access the throttle connector on the top. I was wrong, I could have removed it without removing the pedal. There is a small tab that needed to be pushed to disconnect it but given its weird location, I had a tough time just to reach that area and of course you cannot pull something away from your body
I put in the sprint booster and I notice a huge difference in acceleration. I tried both sport and race modes and to me, the race mode is better. I did not use the Sport mode with race mode. I use it with normal mode and it is blazing fast.

I told you. The Genesis 5.0 engine throttle is very delayed in stock form(even car magazine reviewers comment on the throttle lag), probably for protection since the 5.0 engine is very powerful and can be dangerous when it is unrestricted. My Genesis behaves more like an Mustang or Challenger when I use Sport mode and the Sprint Booster in race mode level 9. White knuckle driving and it hit triple digits in less than blink of an eye.

LOL. I dusted off two different G70 Sport on the highway in the past week with my Genesis in Sport mode and the Sprint Booster engaged. I am sure if the drivers engaged launch control the race would have been more in their favors, but both G70 got dusted on the merge lanes. No contest from a rolling start, until they sped pass me when I slowed down to the legal highway speeds on the open road. I am sure one may be on this forum.

However, the G70 sport can get a large boost in performance with a chip tune so my Sprint Booster will not save me from a loss against a modded out G70 sport.

Note: Do not floor the accelerator pedal with the Sprint Booster engaged. Just press the gas pedal halfway and hold on. The Genesis will have a slow start to about 10 mph as the rpms climb to about 4k and then it will move like it has a turbo that just kicked in. Reminds me of turbo lag on a large turbo engine.

 

[Chad86tsi]

I just put mine in Thursday, I only wanted to rid the car of that lag, not to change the shift patterns or turn it into a sport car. I tend to run in normal mode all the time because I don't like the sport mode shift patters for my driving style and my needs (mostly highway commuting). I was leery, thinking this mod might make the car "twitchy" and "nervous" which is how I find the sport mode does. I want a smooth solid cruiser with lots of power on tap, not a sports car. I already have another sports car, this is my cruiser.

Putting sprint booster on "sport #4" seemed to eliminate the throttle lag without making it any more difficult to smoothly modulate throttle in traffic, and it all but eliminated the indecision it used to feel about accelerating out of a corner or from a stop sigh/light. Now coaxing a downshift is exactly where I want it to be, not too much or too many gears down shift, nor too late with this rather low setting. It's like getting the sport mode throttle response without the sport mode transmission shift patterns or stiff steering/suspension changes. Best of both worlds to me. It does feel faster because I don't have to plan my maneuvers anymore.

Very worth while modification. I had it installed and functioning in less than 2 minutes, and only 5 minutes to devise and implement a mounting solution that I really like.

 

[carguy75]

I just put mine in Thursday, I only wanted to rid the car of that lag, not to change the shift patterns or turn it into a sport car. I tend to run in normal mode all the time because I don't like the sport mode shift patters for my driving style and my needs (mostly highway commuting). I was leery, thinking this mod might make the car "twitchy" and "nervous" which is how I find the sport mode does. I want a smooth solid cruiser with lots of power on tap, not a sports car. I already have another sports car, this is my cruiser.

Putting sprint booster on "sport #4" seemed to eliminate the throttle lag without making it any more difficult to smoothly modulate throttle in traffic, and it all but eliminated the indecision it used to feel about accelerating out of a corner or from a stop sigh/light. Now coaxing a downshift is exactly where I want it to be, not too much or too many gears down shift, nor too late with this rather low setting. It's like getting the sport mode throttle response without the sport mode transmission shift patterns or stiff steering/suspension changes. Best of both worlds to me. It does feel faster because I don't have to plan my maneuvers anymore.

Very worth while modification. I had it installed and functioning in less than 2 minutes, and only 5 minutes to devise and implement a mounting solution that I really like.

I actually use my Sprint Booster in the Genesis ECO drive mode set to the sport 9 as my default setting. The performance is just right to me. The car gets to speed quickly(40-50mph) and then settle back down to ECO(low rpms) when I let off the pedal. My gas mileage averages 18-21 mpg in mixed city/hwy driving with this setup on my daily commutes. When I want to quickly merge or want full power I just press the Genesis drive mode button to Sport.

 

[Chad86tsi]

I actually use my Sprint Booster in the Genesis ECO drive mode set to the sport 9 as my default setting. The performance is just right to me. The car gets to speed quickly(40-50mph) and then settle back down to ECO(low rpms) when I let off the pedal. My gas mileage averages 18-21 mpg in mixed city/hwy driving with this setup on my daily commutes. When I want to quickly merge or want full power I just press the Genesis drive mode button to Sport.

Thanks for the tip, I'll try that for a few days. I didn't like ECO when I tried it before because the response was too frustrating to get it to wake up when I wanted to pass or change lanes in traffic, where you need to act fast or be denied. I did chose this car for power and smooth/quiet , but I didn't like the delay that came with the base programs.

 

[carguy75]

Thanks for the tip, I'll try that for a few days. I didn't like ECO when I tried it before because the response was too frustrating to get it to wake up when I wanted to pass or change lanes in traffic, where you need to act fast or be denied. I did chose this car for power and smooth/quiet , but I didn't like the delay that came with the base programs.

The 2015 5.0 is quick even with the lag. C&D posted a 5 second flat 0-60 time by only stumping the gas pedal from a stand still with the older stock traction limited Hankook AS tires that were not good and got replaced with stock Michelin tires. I actually got a time of 0-60 of 4.6 seconds in ECO mode with a rolling start(let off brake and gradually pressed the gas pedal) without the Sprint Booster on grippier Michelin Pilot A/S 3+ tires. I now have even stickier Falken summer tires. Therefore, the 5.0 model is quick even in stock form with the proper tires and octane. I use 93 octane in my area. C&D used 91 premium, so my engine is running stronger than the test model as well having better tires. I can only imagine how quick the car is with the Sprint Booster engaged.





I have not tested the performance lately with the Sprint Booster due to heavy police presence in my area(open flat road) which make it hard to find a place to perform the test as desired. However, going by how I can nearly out merge any car lately rated to do 0-60 in the 4 second range from a rolling start at highway merge lights; I would say my car is good for a 4.4-4.5 0-60 time with the Sprint Booster. The only car that out merged me lately was a late model Corvette(C7 Sting Ray) and I was on its rear bumper to about 100mph until I slowed down. I am sure that the driver did not use Launch Control at the merge light. Most owners do not see my car as a real challenge for merging until it is too late.

Whether you want it or not, you got a true sports sedan that can out accelerate most performance cars from a rolling start on the roads with the Sprint Booster installed while being more comfortable.

 

[Chad86tsi]

Whether you want it or not, you got a true sports sedan that can out accelerate most performance cars from a rolling start on the roads with the Sprint Booster installed while being more comfortable.

On my short list of cars when I was shopping was a 2nd gen CTS-V, I just couldn't stomach the price for what you got on those. Less tech, and merely equal interior and ride, and almost twice the price for more HP. As you point out, you can't really use more HP above a certain threshold. I will be making modifications for mine over the winter to try to eek out a few more ponies (because I get bored and that's my hobby), but I'm more than satisfied with it as is.

 

[carguy75]

On my short list of cars when I was shopping was a 2nd gen CTS-V, I just couldn't stomach the price for what you got on those. Less tech, and merely equal interior and ride, and almost twice the price for more HP. As you point out, you can't really use more HP above a certain threshold. I will be making modifications for mine over the winter to try to eek out a few more ponies (because I get bored and that's my hobby), but I'm more than satisfied with it as is.

So true. My 2015 5.0 is very hard to compete with since it is perfectly configured for power and comfort. Furthermore, it very cheap to buy compared the other luxury sport sedans while giving similar if not better performance especially with the Sprint Booster and some other modifications like performance air filters.

I feel the 2015 5.0 Ultimate is the best deal Hyundai created so far; so much so that the company split the 2015 5.0 Ultimate features(adaptive suspension and 5.0 engine) in 2017 to create the G80 5.0 Ultimate(V8) and G80 3.3T Sport(adaptive suspension).

In the future the 2015 5.0 Ultimate will become an unicorn in the classic import market I bet.

 

[G-839217]

Old post but i didn't see to much info that I think should be added. Hyundai for whatever reason holds full throttle push (stomping down not stumping) to only 80%. These boosters allow to 100%. Same holds true for the coupes. Some say it was related to Toyotas lawsuit about stuck accelerators, and Hyundai was being careful.
The ecu as someone already mentioned, is careful in how fast it allows the throttle to open.
This fixes that also. Turn off traction control and do a full throttle launch with and without the booster turned on. Compare your burnout Marks...lol real world testing
For anyone saying these are snake oil have no clue what it does. They don't add hp but they certainly unleash what's hidden because of hyundai being afraid to allow 100% throttle.
You can get these for under 50 bucks if you look. I don't want to step on any vendors toes by saying where, but I ordered mine for 55 dollars shipped. This works incredibly well with my SFR ECU and TCU tune. In my opinion this makes the car accelerate how it should have been from the factory. Only other thing i have done is solo performance exhaust added to mods above.

The car is perfect for me now. If you don't think you will like the booster, or think after you had it for a few days you hate it...box it up and send it back. Nothing lost but 5 bucks flat shipping to return it through USPS.

 

[Suburbazine]

Old post but i didn't see to much info that I think should be added. Hyundai for whatever reason holds full throttle push (stomping down not stumping) to only 80%. These boosters allow to 100%. Same holds true for the coupes. Some say it was related to Toyotas lawsuit about stuck accelerators, and Hyundai was being careful.
The ecu as someone already mentioned, is careful in how fast it allows the throttle to open.
This fixes that also. Turn off traction control and do a full throttle launch with and without the booster turned on. Compare your burnout Marks...lol real world testing
For anyone saying these are snake oil have no clue what it does. They don't add hp but they certainly unleash what's hidden because of hyundai being afraid to allow 100% throttle.
You can get these for under 50 bucks if you look. I don't want to step on any vendors toes by saying where, but I ordered mine for 55 dollars shipped. This works incredibly well with my SFR ECU and TCU tune. In my opinion this makes the car accelerate how it should have been from the factory. Only other thing i have done is solo performance exhaust added to mods above.

The car is perfect for me now. If you don't think you will like the booster, or think after you had it for a few days you hate it...box it up and send it back. Nothing lost but 5 bucks flat shipping to return it through USPS.

you tuned a 2015?

and you’re telling me I don’t know how a 5v sweep works? And that a sprint booster somehow hacks the ECU through it?

 

[Suburbazine]

This is why I don’t believe a thing about sprint boosters. It would the completely incompatible with the notion that you're avoiding the kickdown switch but somehow getting 100% throttle.

Fun fact: There is no kickdown switch.