Drag/Acceleration Kia Stinger 1/4 Mile Times

[Kato_the_kia_stinger]

That was my first 1/4 mile and the only one for the night. That incident right in front of me cost a ton of time so most people only got to go once. I'm going again in 2 or 3 weeks so I'm hoping to get some more times.

I think it's also worth pointing out that this was a particularly cool and dry night (low 60s). The track I was at is also pretty serious, it's all glued so I don't think my tires broke loose at all. I'm expecting to see better times from everyone as temps drop.

That’s definitely a great run. Congratulations! Similar thing happened to me on a Friday. Got my run in (map2 on JB4) before someone oiled their pants all the way down the track. I didn’t get another shot to try map3.

 

[Tonkabob]

that is some Macgyver stuff going down. You need to do all that to tune? I thought tuning software was already out.

I watched Tork tune my ECU and looked the same. Its a cross between open heart surgery and the matrix. This isn't a fully cracked obd flash by any stretch.

 

[Jonnytig]

I watched Tork tune my ECU and looked the same. Its a cross between open heart surgery and the matrix. This isn't a fully cracked obd flash by any stretch.

Yup we are still working on obd protocol atm

 

[StungBlueGT2]

Yup heaps of issues. Cant do a burnout to warm tyres either. Stupid factory ECU lol.

Agree and hate that it’s so hard to do a burnout. Rolling burnouts are the best I’ve seen people do with our Stingers...

This is actually where the JB4 should outperform every other option available at the moment. It has “boost by gear” so you can limit & customize boost in gears 1-3.

I believe Terry limited boost in 1st gear so he was able to run a 12.4 with only the JB4 on a stock Stinger. This stops the traction issues off the line, but still runs full boost when needed.

Does anyone else have the ability to eliminate traction issues using a chip/tune?

 

[Doel]

anyone run any stock 1/4s with a RWD GT1 or GT without LSD? I wonder how much slower this car is without the LSD.

 

[Tonkabob]

anyone run any stock 1/4s with a RWD GT1 or GT without LSD (Limited Slip Differential)? I wonder how much slower this car is without the LSD (Limited Slip Differential).

Same. Stock RWDs hook up well on the Track so LSD isnt a big issue.
The 11.98 record holder is not LSD.

 

[Terry@BMS]

Agree and hate that it’s so hard to do a burnout. Rolling burnouts are the best I’ve seen people do with our Stingers...

This is actually where the JB4 should outperform every other option available at the moment. It has “boost by gear” so you can limit & customize boost in gears 1-3.

I believe Terry limited boost in 1st gear so he was able to run a 12.4 with only the JB4 on a stock Stinger. This stops the traction issues off the line, but still runs full boost when needed.

Does anyone else have the ability to eliminate traction issues using a chip/tune?

Yes I use boost by gear to cap boost in 1st gear to 2psi over stock. Non-LSD GT here. To really get the sort of launch it takes to run 11s I think we'll need better tires though. The stock tires can only do so much for you.

 

[Kato_the_kia_stinger]

Yes I use boost by gear to cap boost in 1st gear to 2psi over stock. Non-LSD (Limited Slip Differential) GT here. To really get the sort of launch it takes to run 11s I think we'll need better tires though. The stock tires can only do so much for you.

Does this limit of 2psi over stock in gear one matter for AWD?

 

[Get Stung]

Does this limit of 2psi over stock in gear one matter for AWD?

no it's to keep the 2wd from spinning off the line. Doesnt apply to awd.

 

[sym]

no it's to keep the 2wd from spinning off the line. Doesnt apply to awd.

There might be some merit still in limiting boost, even in AWD. On my 1/4 I had a bad shift, from 3rd to 4th. I think the transmission will refuse to shift to the next gear if the RPMs go too high after disengaging the previous gear. The same thing happens to me occasionally if I lose traction during a launch control run.

 

[Kazz]

Anyone tried drag tires yet? It would be interesting to see if they help some folks without LSD, etc.

 

[Audible Silence]

if theres no LSD on some cars, are they just doing "1 tire fires" in the burnout box?

 

[Kazz]

The Traction control will slow the spinning wheel down, trying to equal out the grip, theoretically. How it really works in a box, I'd like to know. LOL

 

[sym]

I'm not sure what trims have it, but if the car has torque vectoring the car will apply the brakes to the spinning wheel to encourage power to go to the other wheels.

It's the difference between pressing ESC once and holding it down for 2 seconds (as you need to do to engage launch control)

 

[ZyroXZ2]

I feel like from the recent posts (and excuse me for not reading 10+ pages, lol) that there is some misunderstanding between locking and limited slip differentials.

A locking differential and a limited slip under ideal conditions will deliver power equally to both wheels. If a locking diff only ever delivered power to the wheel with less traction, you would constantly veer left and right whenever you accelerate. A locking diff only affects conditions where there is significant traction difference between the two wheels, and unlocks so that the wheel with less traction is allowed to spin without causing the tire with more traction to spin out. Thus, it delivers more power to the already loose wheel to ensure the wheel with traction stays in traction.

A limited slip differential does exactly the opposite when traction between the two wheels differs drastically, and transfers more power to the wheel with more traction. Thus, if one wanted to launch a car as hard as possible, a LSD assists by ensuring power continues to go to the wheel with more grip.

However, in ideal conditions (ex/ two perfectly identical tires on perfectly level, even pavement with equal grip), both a locking and a limited are operating exactly the same: power to both wheels. This is why some of the fastest drag times are still coming from people with locking diffs. A LSD only helps in non-ideal conditions where the wheels are constantly losing traction, and a locking diff only unlocks in non-ideal conditions where the wheels are constantly losing traction.

 

[Audible Silence]

So it's not an open diff

 

[brancky3]

So it's not an open diff

Pretty sure the non-LSD RWD cars have open diffs.

 

[Grayt 8]

I feel like from the recent posts (and excuse me for not reading 10+ pages, lol) that there is some misunderstanding between locking and limited slip differentials.

A locking differential and a limited slip under ideal conditions will deliver power equally to both wheels. If a locking diff only ever delivered power to the wheel with less traction, you would constantly veer left and right whenever you accelerate. A locking diff only affects conditions where there is significant traction difference between the two wheels, and unlocks so that the wheel with less traction is allowed to spin without causing the tire with more traction to spin out. Thus, it delivers more power to the already loose wheel to ensure the wheel with traction stays in traction.

A limited slip differential does exactly the opposite when traction between the two wheels differs drastically, and transfers more power to the wheel with more traction. Thus, if one wanted to launch a car as hard as possible, a LSD (Limited Slip Differential) assists by ensuring power continues to go to the wheel with more grip.

However, in ideal conditions (ex/ two perfectly identical tires on perfectly level, even pavement with equal grip), both a locking and a limited are operating exactly the same: power to both wheels. This is why some of the fastest drag times are still coming from people with locking diffs. A LSD (Limited Slip Differential) only helps in non-ideal conditions where the wheels are constantly losing traction, and a locking diff only unlocks in non-ideal conditions where the wheels are constantly losing traction.

Are you confusing an open diff from a locking diff?

 

[Adamdan]

Even with my awd hitting 18psi with jb4 it only hits 15psi in 1st and 2nd gear.

 

[Doel]

Are you confusing an open diff from a locking diff?

Yeah, I think he is. A locked diff is what you usually see in drag cars because it forces both wheels to spin at the same rate. The stinger either has an open diff or limited slip diff. The open diff is fine if the track and tires have near identical traction. If they don't, you're going to have one tire spinning more than the other, that's before all the electrical gizmos come into effect anyway.