Flex EcoBoost Quarter Mile Pass

[Tech Addiction]

So what did the Traction Control on do to my run? It wasn't feeling like it was trying to spin but you never know what goes on. I couldn't hear because of the race cars I was running against. I know my mustang will **** the throttle when T/C kicks in but I know the Flex is pretty complicated with rear clutches and sensors at each wheel and all. Do you think it held me back just in first or more than that?

My best run was this..

60'... 2.188
330.. 6.029
1/8.. 9.263
MPH. 76.47
1000 12.019
1/4.. 14.349
MPH. 96.78

Looks like you had me by .099 at the 330 and only .12 by the 1/8, so I lost most of my time in the launch which probably was the Traction Control like ya'll said. I hope to go back next weekend and the weather looks good.

 

[Fishrising]

You guys have me hooked, time for an exhaust change and maybe a tune for my EB Flex.

 

[darreli]

I would think it was the TC. Probably sensed some wheelspin. I know my Flex will spin some off throttle and it's stock. I would run with the TC off and see what happens.

 

[Tech Addiction]

You guys have me hooked, time for an exhaust change and maybe a tune for my EB Flex.

Welcome to insanity. Once you pass through you can never go back. LOL

 

[Tech Addiction]

I would think it was the TC. Probably sensed some wheelspin. I know my Flex will spin some off throttle and it's stock. I would run with the TC off and see what happens.

Does this Traction Control work differently than say a new Mustang with Drive By Wire? My Mustang shuts the throttle down for traction control. How does the EB Flex work? Just curious.

 

[hawkeye18]

To my knowledge the TC on the Flex is largely the same as the Mustang; it applies brakes to individual wheels and cuts off throttle as necessary. Is the Flex not an electronic throttle application as well? I don't know if it is, but I'm willing to bet it is.

 

[Tech Addiction]

To my knowledge the TC on the Flex is largely the same as the Mustang; it applies brakes to individual wheels and cuts off throttle as necessary. Is the Flex not an electronic throttle application as well? I don't know if it is, but I'm willing to bet it is.

The Flex is DBW as well but My 2005 Mustang GT I have does not apply the brakes that I know of for traction control, it just kills the throttle. Am I wrong? I figured the Flex must apply the brakes and figured that was why I didn't feel the traction control kicking in. When the Flex spins the wheels bad it will trip traction control and **** the throttle so I was thinking at the track since I didn't see the traction control light that it wasn't activating but now it makes since. I plan to rerun it this weekend with TC off. Hopefully I can dip down into the 14.0's, the weather is supposed to be good.

 

[hawkeye18]

From the 2011 Mustang GT Manual:

Excessive wheel spin is controlled in two ways, which may work
separately or in tandem, engine traction control and brake traction
control. Engine traction control works to limit drive-wheel spin by
momentarily reducing engine power. Brake traction control works to limit
wheel spin by momentarily applying the brakes to the wheel that is
slipping. Traction control is most active at low speeds.

 

[bill murray]

Dummy Dugan Here.

I thought Traction Control only applies to forward motion and has nothing to do with braking, which has to do with ABS as I see it.

I think I understand the two principles and my quick reading of the manual seems to validate that.

As I remember, that was the way it was on my 1999 Lightning.

Anyone out here that knows the real answer??????????

Bill

 

[Tech Addiction]

Dummy Dugan Here.

I thought Traction Control only applies to forward motion and has nothing to do with braking, which has to do with ABS as I see it.

I think I understand the two principles and my quick reading of the manual seems to validate that.

As I remember, that was the way it was on my 1999 Lightning.

Anyone out here that knows the real answer??????????

Bill

I think what Hawkeye is saying is that when the computer senses wheel spin that it can apply the brakes to control it. Since the AWD EcoBoost Flex powers all wheels, it use the brakes to limit a wheel slip or spin, but if the spin becomes excessive, then it kills the throttle. Am I right?

 

[SHO U UP]

I think what Hawkeye is saying is that when the computer senses wheel spin that it can apply the brakes to control it. Since the AWD EcoBoost Flex powers all wheels, it use the brakes to limit a wheel slip or spin, but if the spin becomes excessive, then it kills the throttle. Am I right?

I think you are right about the braking set up there Tech Addition, as is Hawkeye. Bill, our Lightnings never came with any kind of traction control from the factory. Only kinda control they had comes from our right foot. For an example, today we tried to attempt a burnout in a Mercedes SL500 (customer didn't mind, he was getting new tires anyway) We knew it would have no problem doing it, but as soon as the rear tires tried to spin, power was cut. Even with the traction off, it did not help. It did indeed have no problems getting sideways though.

 

[Tech Addiction]

I know it's not a Taurus but it does have the Ecoboost! Anyway I took the Flex out tonight to see what it would do stock before I get a tune for it. My best pass looked like this:

60ft............2.130
330ft...........5.930
1/8 ET.........9.143
1/8 MPH.......77.14
1000'...........11.87
1000' MPH....89.45
1/4 ET.........14.17
1/4 MPH.......97.88

Not bad. Had a bunch of people come up and ask what was done to the vehicle


This is from my 14.1 pass. I'll see if I still have the timeslip from the 14.0 pass. It was like a week later

Well, i'm back and here is the result from last night. Temp was 79 on my best run. The longer I cooled down the faster it got. My best run came with a 45 min cool down with a bag of ice on the intake. It still wasn't cooled down all the way. It would have been better if I had brought my fans to cool it all the way down. The engine was hot as **** after a run.

60ft....2.164
330....5.976
1/8.....9.197
MPH....76.79
1000...11.941
1/4.....14.259
MPH....97.32

I had runs also of 14.287 @ 97.31, 14.294 @ 96.96 My slowest was the last due to a hot lap 14.439 @ 96.65 Exactly 11 min between the last run and 14 seconds of that was me running down the track .

 

[Tech Addiction]

I know I told everyone that I wasn't going this week but I couldn't resist. I had the New tune installed and the Airaid CAI and wanted to know how it would do. It was hot as **** today and I really didn't expect it to do much. I was wrong.

60ft....2.061
330....5.743
1/8.....8.852
MPH....79.19
1000...11.522
1/4.....13.780
MPH....99.77

I had 3 runs of 13.78 and one 13.79. My best 60ft was 2.03 and my best MPH was 99.90 and my best 1/8 mile was an 8.81. The temp was 96 degrees and by night it was still mid 80's with massive humidity so my times started going back to 13.86's My slowest of the day was my first and that was 13.89. I also weighed the Flex at the track, and the only thing I took out was the spare tire to help hold my awning down. It weighed 4985 with me in it. Now that's hauling ASS.

 

[hawkeye18]

>13.78

>5,000lbs

Jesus.

Edit: online calculators suggest a WHP figure of ~380hp. Assuming a 20% drivetrain loss for AWD, that's 475CHP.

Jesus.

 

[Tech Addiction]

>13.78

>5,000lbs

Jesus.

Edit: online calculators suggest a WHP figure of ~380hp. Assuming a 20% drivetrain loss for AWD, that's 475CHP.

Jesus.

I think the drivetrain loss may be more. Torrie at Unleashed tunning, where I got my tune from, says the factory set up puts out 260 WHP. The Flex is rated at 355 at the crank but thats on regular gas. On Premium like the SHO it puts out 365 at the crank. Still the slide rule doesn't lie huh. It always takes X number of HP to move X number of weight through the quarter. I guess I will have to find an AWD dyno around here and find out.

 

[Billm0066]

Dont bother with a dyno. They dont mean anything. Just go to the track and keep putting some good numbers down.

 

[EcoBrick Bob]

I think the drivetrain loss may be more. Torrie at Unleashed tunning, where I got my tune from, says the factory set up puts out 260 WHP. The Flex is rated at 355 at the crank but thats on regular gas. On Premium like the SHO it puts out 365 at the crank. Still the slide rule doesn't lie huh. It always takes X number of HP to move X number of weight through the quarter. I guess I will have to find an AWD dyno around here and find out.

The AWD drive train loss may be as much as 28% from what has been
discussed elsewhere.

Considering how hot it was, any idea on what your adjusted times would have been?

At G8 natl meet, when temps were around 90 with very high humidity,
times were off .4-.6 in G8's that were running in the high 13's.

Are you ready for the next step???? Breaking into the 12's!!!!!!!

 

[LJRuddy]

28%+ drive train loss... Thats crazy. Almost makes one think about converting to RWD to see how much more power one can put down.


Great times everyone! I can't help but smile when I see threads like this. Who knew that Ford would be able to turn around from the absurd line up they had in the early 2000's to today when they are able to propel a nicely equipped 5,000lb crossover down a 1/4 mile in under 14 seconds at triple digit speeds.

Almost makes me want to get into some major new car debt.

 

[Tech Addiction]

That's why I said this thing reminds me of my 2000 Ford Lightning. I had a tune, 4.10 gears and a CAI in it and got a 13.37 on a very cool night. It weighed 4600 lbs. I have no doubt the Flex will beat those numbers. I would say .4 to .5 were definitely left on the table due to the temps and humidity.. maybe more. The exhaust alone would probably put me very close if not in the 12's. What do ya'll think?

 

[hawkeye18]

I think 380hp at a 27% loss equals like 530chp. Which is ridiculous. And makes me wonder how much longer the tranny's gonna last...