Drag/Acceleration Kia Stinger 1/4 Mile Times

[StungBlueGT2]

Has anyone compared 1/4 times for AWD GT while using launch control versus just going at it regularly? How much does launch control really help you get up to speed?

Good question but don’t know why anyone would use launch control(LC) with AWD.

Both LC & AWDs main purpose is to mitigate wheel spin so using both would be redundant. AWD already diverts power from wheels that slip to wheels that grip. So wheel-spin(besides a chirp) shouldn’t really happen in AWD, unless seriously upgraded.

My understanding is LC should help improve acceleration by allowing power braking to 2250RPM(3-4K would be better but could hurt transmission) and limiting boost in 1st to control wheel-spin.

I know this helped my RWD 0-60 by 0.1sec, but unsure if it would help AWD since they already benefit from 4 wheel grip.

 

[StungBlueGT2]

Since this thread is alive again I figured I’d update a recent JB4 1/4m run.

Getting a bit quicker. Our rough prototype intake added around .1th/1mph, so far.

I have to say 12.3@117 is pretty amazing for just a chip and intakes!

 

[Tonkabob]

Has anyone compared 1/4 times for AWD GT while using launch control versus just going at it regularly? How much does launch control really help you get up to speed?

At the track i did 4 tests that came out identically. In my AWD GT2 i used LC vs AH (auto hold) which is "regular" just no need to hold the brake. LC was only .03 faster in the 1/4. However in a real race LC is significantly faster. Reaction time using AH was .3 slower (which is not counted in your ET). So with the car is reved up its barly faster but starts moving sooner.
Comfort mode with break torque is .4 slower which was very noticable. I did this on accident and thought my car was broken.

 

[Kato_the_kia_stinger]

So would the consensus be that it’s better to run LC? I guess at a track, it’s important to get the timing right because there is only about four seconds to get moving after it’s engaged, right?

 

[Tonkabob]

LC is a little faster so i would use it. If you re-learned your light timing with AH then the lag would not be a factor as long as it's consistent. Even using LC I leave on the last yellow not the green.

 

[Ucinn]

LC for my GT AWD was .3 faster in the quarter..13.2 to 13.5

 

[Kato_the_kia_stinger]

LC for my GT AWD was .3 faster in the quarter..13.2 to 13.5

Stock?

 

[Terry@BMS]

So would the consensus be that it’s better to run LC? I guess at a track, it’s important to get the timing right because there is only about four seconds to get moving after it’s engaged, right?

It's best to use it just especially with the AWD models, and it's easy to use, it's just not the sort of launch mode those of us coming from //M models or other cars might be used to.

 

[StungBlueGT2]

LC for my GT AWD was .3 faster in the quarter..13.2 to 13.5

So you had wheel-spin without LC on a stock AWD?!? 0.3 seconds is a pretty significant difference and not sure what else would cause that much of a change.

 

[Tonkabob]

LC for my GT AWD was .3 faster in the quarter..13.2 to 13.5

And that was in the ET on a track? Wonder why mine did so little. When you didnt use LC how did you launch?

 

[KLR STINGER]

Here's my quickest AWD pass. Intakes, downpipes, exhaust and Jb4 map 3 with fuel control. With a 1.7 launch this car would be in the 11s. Need tuning to come through soon.

 

[Tonkabob]

Here's my quickest AWD pass. Intakes, downpipes, exhaust and Jb4 map 3 with fuel control. With a 1.7 launch this car would be in the 11s. Need tuning to come through soon.

Plus you are going up hill! Need to find a flatter road. ☺
This makes you the fastest AWD if we count draggy. Are you able to get to a track? Seems believable with your mods and draggy is supposed to be accurate for ETs.

 

[Terry@BMS]

Plus you are going up hill! Need to find a flatter road. ☺
This makes you the fastest AWD if we count draggy. Are you able to get to a track? Seems believable with your mods and draggy is supposed to be accurate for ETs.

Literally spot on: N54Tech.com - Your Source for International Turbo BMW Racing Discussion - View Single Post - Move over VBOX, Dragy is here!

 

[Tonkabob]

Literally spot on: N54Tech.com - Your Source for International Turbo BMW Racing Discussion - View Single Post - Move over VBOX, Dragy is here!

Did you notice on that dragy link tjat one run was up hill an the other down hill? But the times were really close.

 

[robz32]

Amazing how close the app was to the time slip, will definitely download it.

 

[Terry@BMS]

Did you notice on that dragy link tjat one run was up hill an the other down hill? But the times were really close.

Yes that elevation variance on the same track is strange, not something I've seen before on it. My personal track always shows the same slope. Maybe a minor firmware bug there.

 

[KLR STINGER]

Plus you are going up hill! Need to find a flatter road. ☺
This makes you the fastest AWD if we count draggy. Are you able to get to a track? Seems believable with your mods and draggy is supposed to be accurate for ETs.

Waiting for the fall weather to go to the track. This run was 29c with 80% humidity. If I can find a way to get a sub 2.0 60' and sub 20c temps with some race gas, should be a low 12.

 

[Terry@BMS]

Amazing how close the app was to the time slip, will definitely download it.

The app is just an interface to the dragy device itself which is a high speed GPS system used for measuring vehicle performance. Runs like 10x faster than phone GPS can.

 

[KLR STINGER]

Yes. The dragy is dead accurate. 10mhz GPS sampling rate using Doppler shift between sats to calculate speed and distance not time/ distance for speed.

 

[RandallK]

Congrats to @Sales@Tork for being the first to break into the 11’s.. unreal