Drag/Acceleration Kia Stinger 1/4 Mile Times

[ryan1stinger]

Here's my solution. Easier said then done. Let's have an annual meet-up at someone's private track and use one Dragy device for measuring the 1/4 mile, then there will be no dispute.

 

[SteveCo]

That's the tricky part with a Dragy - finding a flat, straight stretch of road where you can briefly run a car up to 100+ MPH in a safe manner, and without running afoul of local law enforcement. Sadly, our local racetrack (with 1/4 mile strip) closed a few years back when the city needed the land for a ring road.

There have been a few efforts since to build tracks or race complexes (with oval, road course, and drag strip) close to the city, and some have been well funded and planned. Unfortunately they keep getting shot down by the local landowners with a strong NIMBY view of the world ...

I keep the Dragy in the console, and always have an eye out for a good piece of road ...

 

[Kamauxx]

Unfortunately they keep getting shot down by the local landowners with a strong NIMBY view of the world ...

I don't blame em. They're extremely loud and constantly smells like tar and exhaust. I wouldn't want a track within a few miles of my house.

 

[ryan1stinger]

While healthy competition is good, the reason I do this, and I think most would agree is to improve your personal best time, which can be easily determined by using the same device, at the same location. Of course weather and temp can play a role in that, but that is for you to determine how much of a role. My recommendation is too keep your eye on the prize. Be safe and have fun while seeing the modifications you make to your car improve acceleration, 60ft, 0-60, 1/4 mile. Whatever peaks your interest and share that with the group. If your end goal is to have the quickest Stinger out there hands-down with no dispute, then that is not possible, because there are just too many variables. Even drag strips are not equivalent.

 

[TwinSnails]

I think the unit is great for showing improvements modifications are making, good or bad. Cheaper than a dyno and awesome tool for comparisons.

 

[Tonkabob]

Every one ask for Dragy for Christmas!
Here are my jb4 style charts for my 12.03 1/4 mile for the Tork ECU tune. Data logging for $15 - Wireless OBD and torque app another stocking stuffer!
11.9 second coming soon with stock wheels and tires and 4 cats. Stay tuned....

First chart without speed so you can read the good stuff and second with speed.

 

[TwinSnails]

I must say that’s one of the smoothest logs I’ve seen. Very Nice.

 

[Jwolf]

I must say that’s one of the smoothest logs I’ve seen. Very Nice.

I said it in a different thread he posted in too. Those are beautiful!

 

[StungBlueGT2]

Every one ask for Dragy for Christmas!
Here are my jb4 style charts for my 12.03 1/4 mile for the Tork ECU tune. Data logging for $15 - Wireless OBD and torque app another stocking stuffer!
11.9 second coming soon with stock wheels and tires and 4 cats. Stay tuned....

First chart without speed so you can read the good stuff and second with speed.
View attachment 15481 View attachment 15482

Very informative and thanks for sharing.

Gotta admit I’m growing more & more jealous of my AWD Stinger brothers. Now I can see why 3 second 0-60s are possible as the 16.24psi in first gear is amazing! I can already break the tires loose with just intakes, and any extra boost at launch just spins the tires for those with RWD.

Kia maxed the power limits for the stock 255 tires and our only hope is 285+ and/or drag radials.

It will be great to see both RWD & AWDs in the 11s, and thanks again for helping show everyone what our Stingers can do!

 

[TwinSnails]

The 255’s are definitely maxed with about 15-20more hp over factory. Essentially useless. 275’s are my next set for sure.

 

[Tonkabob]

Every one ask for Dragy for Christmas!
Here are my jb4 style charts for my 12.03 1/4 mile for the Tork ECU tune. Data logging for $15 - Wireless OBD and torque app another stocking stuffer!
11.9 second coming soon with stock wheels and tires and 4 cats. Stay tuned....

First chart without speed so you can read the good stuff and second with speed.
View attachment 15481 View attachment 15482

Tork spent about an hour smoothing out the transitions on the stock ignition tables. 3d ignition map that looks like the side of a mountain. Maybe that helped make the logs so smooth.

 

[Jwolf]

Tork spent about an hour smoothing out the transitions on the stock ignition tables. 3d ignition map that looks like the side of a mountain. Maybe that helped make the logs so smooth.

What type of fuel were you running?

 

[Tonkabob]

What type of fuel were you running?

92 octane. Washingtons states premium.

 

[Jwolf]

92 octane. Washingtons states premium.

That's what I guess. I only have 91 so I wonder if that tune would need to be slightly toned down for me. After seeing those logs I'm sold on the Tork tune!

 

[Terry@BMS]

I must say that’s one of the smoothest logs I’ve seen. Very Nice.

Happy to see flash tune customers finally posting some data! Log looks as expected, basically same as what we're running. Keep in mind boost and timing will vary based on IAT and baro. The colder it is the less boost the factory tuning runs and the more timing. As IAT heats up boost will go up and timing will go down. So you'd want IAT on there to evaluate how aggressive boost is set. If IAT is high it's a mild tune, if IAT is low it's a wild tune, for example. Also the Stinger uses an absolute boost sensor so the logging software needs to zero it out it's reading to get to absolute boost like we show. Seems to be -0.75psi at the start? The number of sample points and axis scaling will also effect how the log "looks".

JB4 log I recorded the other day except my boost in 1st gear is set to -6psi for stock tire RWD traction. 12.4@118, nothing special. Hoping with traction to get down in the 12.1 range.

 

[Jwolf]

Happy to see flash tune customers finally posting some data! Log looks as expected, basically same as what we're running. Keep in mind boost and timing will vary based on IAT and baro. The colder it is the less boost the factory tuning runs and the more timing. As IAT heats up boost will go up and timing will go down. So you'd want IAT on there to evaluate how aggressive boost is set. If IAT is high it's a mild tune, if IAT is low it's a wild tune, for example. Also the Stinger uses an absolute boost sensor so the logging software needs to zero it out it's reading to get to absolute boost like we show. Seems to be -0.75psi at the start? The number of sample points and axis scaling will also effect how the log "looks".

JB4 log I recorded the other day except my boost in 1st gear is set to -6psi for stock tire RWD traction. 12.4@118, nothing special. Hoping with traction to get down in the 12.1 range.

View attachment 15547

He has a FMIC and he's in Washington so his IATs are probably very low right now. Also, any boosted tract can read negative boost down to -15 or more. Just means it was in vacuum instead of boost at the moment. It could be off, but that doesn't necessarily mean it is. But I think he said the target for the tune was 16.x psi so it looks dead on to me.

 

[TwinSnails]

Happy to see flash tune customers finally posting some data! Log looks as expected, basically same as what we're running. Keep in mind boost and timing will vary based on IAT and baro. The colder it is the less boost the factory tuning runs and the more timing. As IAT heats up boost will go up and timing will go down. So you'd want IAT on there to evaluate how aggressive boost is set. If IAT is high it's a mild tune, if IAT is low it's a wild tune, for example. Also the Stinger uses an absolute boost sensor so the logging software needs to zero it out it's reading to get to absolute boost like we show. Seems to be -0.75psi at the start? The number of sample points and axis scaling will also effect how the log "looks".

JB4 log I recorded the other day except my boost in 1st gear is set to -6psi for stock tire RWD traction. 12.4@118, nothing special. Hoping with traction to get down in the 12.1 range.

View attachment 15547

@Terry@BMS ,in the log is speed in the bottom?

And if so, it looks like right on the full throttle jump the AFR takes a little to settle in, I’m used to seeing that happen in under 500rpm. Is that from a slight lag from intercepting the signals with a piggyback?

 

[Tonkabob]

Happy to see flash tune customers finally posting some data! Log looks as expected, basically same as what we're running. Keep in mind boost and timing will vary based on IAT and baro. The colder it is the less boost the factory tuning runs and the more timing. As IAT heats up boost will go up and timing will go down. So you'd want IAT on there to evaluate how aggressive boost is set. If IAT is high it's a mild tune, if IAT is low it's a wild tune, for example. Also the Stinger uses an absolute boost sensor so the logging software needs to zero it out it's reading to get to absolute boost like we show. Seems to be -0.75psi at the start? The number of sample points and axis scaling will also effect how the log "looks".

JB4 log I recorded the other day except my boost in 1st gear is set to -6psi for stock tire RWD traction. 12.4@118, nothing special. Hoping with traction to get down in the 12.1 range.

View attachment 15547

Good info Terry. If boost drops when cold, what is the optimum IAT to be fastest?
I've been running mostly on cold days. Did run the 3.87 at 50 degrees but the 1/4 miles were low 30s.
On this run IAT was 65 at start 60 at the end. I'm logging the boost / vacume gauge so it goes -10 or what ever. (My log starts during LC so boost near 0) Also have the option to log absolute intake pressure.
The bottom chart axis is time, just the data point count. Logging every .25 seconds.
On the second graph speed is on the left on the scale that goes to 125.

 

[Tonkabob]

He has a FMIC and he's in Washington so his IATs are probably very low right now. Also, any boosted tract can read negative boost down to -15 or more. Just means it was in vacuum instead of boost at the moment. It could be off, but that doesn't necessarily mean it is. But I think he said the target for the tune was 16.x psi so it looks dead on to me.

My target psi is higher but during 0-60 and 1/4 mile runs I've been in the 16s so far. If i did a single gear pull the boost would be little higher at the low rpms - 17s.

 

[Terry@BMS]

@Terry@BMS ,in the log is speed in the bottom?

And if so, it looks like right on the full throttle jump the AFR takes a little to settle in, I’m used to seeing that happen in under 500rpm. Is that from a slight lag from intercepting the signals with a piggyback?

With the JB4 the sensor values are changed at the same rate or faster than the ECU reads them, hundreds of times per second. On AFR maybe you're looking at post shift where fuel is momentarily cut by the ECU? You can see the same behavior in the 1-2 shift on the flash log also. It's easiest to capture that in logs in lower gears, and you have to be sampling fast enough to capture it.

X axis is time in ths of a second.