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Elantra throttle lag fix?

19K views 39 replies 14 participants last post by  2002duce 
#1 ·
Anyone know of a way to tighten up the throttle lag? I have heard of devices like Sprint Booster, Pedal Commander, and Ultimate Control... thoughts?
 
#5 ·
I have a similar device to the Sprint Booster on my Gen Coupe. It's a Tros Potent Booster and half the price of the Sprint.

It is amazing and should be the first mod someone does no matter what the car. It will make the throttle as reactive as you can stand. It is easly changed on the go if you want.

I get better gas mileage too as you do not hardly use as much actual gas pedal movement with it on.
 
#7 ·
I get better gas mileage too as you do not hardly use as much actual gas pedal movement with it on.

I really don't see how boosting the accelerator profile could improve gas mileage. The opposite tends to be true, ie reducing acceleration and staying in lower gears longer improves gas mileage; it's called ECO mode and it makes the car pretty sluggish.
 
#6 · (Edited)
I have Sprint Booster installed on my car for about a month now. Before purchased, I was skeptical as well, but after watching videos, and reading reviews, I decided to give it a try (30 days money back guarantee). I have no regrets of buying it. The car is responding much quicker on take off and when needs to speed up while driving(to pass..., or to merge into...). I have a company vehicle for daily driving and use my car mostly on weekends. So, I still on the process of finding the right mode on selector button without compromising fuel economy. First, I set SB on Sport-5, then tried it on Race-9, and it really feels like you are in different category of cars. Now I backed down to a Sport-9 selector for more moderate acceleration.
So, please, do not install this kind of stuff on your car; it may change your driving habits wrong way.
 
#11 ·
My insurance company says it's a performance modification (no different than adding a turbo), even though it does nothing for HP. It's essentially putting the car in a "sport mode" and leaving it there. I explained to them that the A/T variant has Drive Mode Select and therefore the ability to change to a different throttle response natively from the factory but they said that if I get an aftermarket part to do the same (even if it's installed by the dealer) it will void the warranty.

Pretty much a function of them not understanding cars (the guy I spoke to didn't know what a throttle body was), but I digress...
 
#12 ·
My insurance company says it's a performance modification. they said that if I get an aftermarket part to do the same (even if it's installed by the dealer) it will void the warranty.

Regarding drive modes, eg ECO and Sport, they clearly change the automatic transmission's rpm shift points, but I don't know about throttle response - perhaps someone here can weigh in on that?


Regarding whether or not installing a Sprint Booster would void the car's warranty I would ask the dealer.
 
#13 ·
I drive several vehicles with lag, diesels with serious turbo lag. I can honestly say that what some may mistake for lag in the elantra is simply a lack of low end torque which is a result of the adkinson cycle. I'm on my 2nd Elantra. First was a '17 model.
 
#15 ·
Drive-by-wire time delay is a real thing.
When you push the go pedal you're sending a signal to the engine computer, nothing more.
The computer takes consideration of the current running conditions, which takes time.
Of course some computers are faster than others.

A calculation is made based on engine speed, present load and more, then the throttle plate opened at a controlled rate, and fuel delivery adjusted, but they must track to keep the air/fuel ratio in control during that fraction of a second transient.
Otherwise the engine will put out puffs of excessive emissions every time the throttle is moved.
Carburetors were very sloppy at this, with their accelerator pumps.
At one time in California some cars were not sold with 5-speed manual trans, only 4-speed because the extra shifting made them fail the emissions regs.


Anyway on my previous car (2006 Toyota Matrix) I could demonstrate DBW lag by giving the throttle a quick jab (in neutral).
I could get my foot on and off the pedal before the engine would rev up about a 1/4 second later.


Those throttle enhancers simply make the throttle signal to the computer bigger, and/or add a time differential factor to the signal, to make it seem like the pedal is moving faster.
They cannot reduce computation lag.
 
#16 · (Edited)
This may or may not apply to your Elantra, but give it a try: Before I purchased Elantra Sport, I was driving 15 Elantra GLS 6speed manual gearbox. The ECU, mostly in sub-zero temperatures (I see you are from Edmonton as well), cut the throttle every time it sensed even slightest wheel spin. My solution was to disable the traction control button (single press). The vehicle became lively and allowed normal (for me) driving. While this feature may be helpful to new or unskilled drivers in slippery/winter driving conditions, for an experienced driver it is a nuisance, as the car refuses to move when the throttle is depressed.
 
#19 ·
You need to get one of theses. Easy to install, easy to program, many different modes. It will transform your car and the first month you will be driving with a huge grin on your face. After using it for some time you don't even notice it until you shut it off. It should get you a bit better gas mileage too as you are much gentler with the throttle.


https://www.potentbooster.com/
 
#20 ·
You need to get one of theses. Easy to install, easy to program, many different modes. It will transform your car and the first month you will be driving with a huge grin on your face. After using it for some time you don't even notice it until you shut it off. It should get you a bit better gas mileage too as you are much gentler with the throttle.


https://www.potentbooster.com/
Is it similar to the Sprint Booster? Do you remove the gas pedal to install?


How much was it? Do you know if they ship to Canada?


Cheers
 
#21 ·
#22 ·
Yes it is similar tot eh SB. You have to take the pedal off and then disconnect the OE connector (this is the hardest part). The pedal is just a pin.

Connect it, string the wire up under the dash and choose a location for the control panel. Mine is laying flat in front of the odometer on my Gen Coupe.

I paid $115 for my 6 mode one off aliexpress. Once you find what you like you probably won't change it much.

https://www.aliexpress.com/item/Pot...&terminal_id=31bea3062bca4106becf76ee233a14a1
Hmmm... now to find for a 2019 Elantra...
 
#23 ·
I'm frankly surprised this is a topic of discussion, at all. This device/modification is effectively doing that- just leaving the throttle in Sport mode.



The throttle "lag" is part of the drivetrain programming. I appreciate the fact that in normal mode, it electronically "rolls" onto the throttle so I don't have a wheel-hopping mess if I floor it from a light. Instead, it smartly rolls onto the throttle itself and gets on it's way. When you put the cars in Sport mode, it eliminates the lag and makes the response pretty much instantaneous. Eco encourages a different driving style by further diffusing the response and requiring further pedal travel to wake things up.



I've driven a number of cars in the past, especially early drive-by-wire throttles (my 2002 Sentra SE-R Spec V, from years ago, for example) that have egregious , nearly unforgivable throttle lag. This is definitely not one of those cars.


If you enjoy this part, and it makes you feel better, more power to you. But I would consider it a waste of money. So far as any fuel mileage benefit is concerned, unless it's scientific with verifiable proof that it alters A/F ratio from the factory ECU programming, at any given throttle position, it's bunk.
 
#25 ·
What you may not realize is that the M/T Elantra does not come with Drive Mode Select. It is essentially locked in "normal" mode. If sport mode were available, I probably wouldn't bother with a throttle booster.



That said, a throttle booster can tighten things up much more than sport mode. Higher end ones even have "valet" mode, which cuts the throttle substantially, and "lockout" mode, which eliminates all throttle without entering a pin.

Many Hyundai Genesis owners buy them, including the product specialist at my local Hyundai dealer. As a matter of fact, even the head of the service department was a fan. Said it was the best dollar for dollar upgrade you can put on a drive-by-wire car.

As far as too much throttle response, this can be adjusted. In my opinion reducing throttle lag puts the experience of driving back in the hands of the driver. Sort of like how threshold breaking is more effective than anti-lock breaks... for those who properly know how to break.
 
#27 ·
At least this mod does something as opposed to those "performance chips" that you plug into your OBD-II port...

Still don't really see the point in this though since it doesn't add any additional power or anything.
 
#31 · (Edited)
SO I'm guessing this greatly decreases mileage? I want better mileage, not worse.

I've driven over one million miles now and have never needed to accelerate super fast anywhere I've been in North America. Even my old 85 horsepower hatchback I had in the late 80's, had more than enough power for getting on the highway, passing etc. And I also never come anywhere close to flooring an acceleration pedal. Usually my foot is barely on it.
 
#33 ·
i can see the mileage increase. i always felt the map sensor needed improvement. it needs to sense when to downshift a lot sooner, like when decelerating and going around a sharp turn, then accelerating, it needs to get to a lower gear a lot faster. when on the freeway, and the road has a slight incline, it needs to downshift sooner. of all the bad things i can think of about the prior car, a 2013 mazda 3, it was way better in this regard.
 
#38 · (Edited)
They do command a lot higher initial opening of the throttle plate compared to the position of the gas pedal depending on your setting. It decays fast though and if you hold your foot at half pedal will return to that status. But it is not linear.

In a very aggressive mode it only takes a small bit of movement to create a short term commanded 100% throttle opening, it will show as around 85% throttle position on the OBDII. Thus as you learn the response you use less throttle input and get a bit better gas mileage.
 
#40 ·
Heard they speed up throttle response, that may be your answer, i had very slow throttle response, i completely gutted eliminated all restrictions in the intake system A to Z up to the throttle body and i ported the stock throttle body, made a world of difference, in throttle response then i had the throttle body bored, i saw a bigger difference with the work i did prior to getting it bored. the boring seemed to make it a little stronger at all RPMs. good luck
 
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