Flex EcoBoost Quarter Mile Pass

[Tech Addiction]

The tune and filter if you can add them together would be almost 70 Whp. If the stock tranny could hold 310 Whp I assume 70 more should be within the margin of safety the factory built in. Did you see the durability test ford did on the F150 Engine? That was rediculous. Ford engineers were doing demo dragstrip runs on the Flex bone stock and getting 14.5 at 98. I would think they wouldn't want to show these things on the strip if they were fragile. Not saying the tranny is bullet proof but there should be enough margin built in up to a point. There is still a better intercooler option and lowering the engine temps like EcoBrick Bob. I see no reason why 12's on a good night were not totaly within reach.

 

[EcoBrick Bob]

And to think he towed that big trailer on his left to the track and back, with the hot "Stang" inside!

 

[Tech Addiction]

And to think he towed that big trailer on his left to the track and back, with the hot "Stang" inside!

Not this time Bob, LOL, I haven't got a car trailer yet but want one soon. My buddy said I could borrow his open trailer anytime. I was stuck between a 10.0 bracket Mustang and a 4.90 1/8th mile Corvette. I had more visitors to my Flex than either of them. :laugh_ti:

 

[EcoBrick Bob]

I think you should have "played along" and really had everyone confused.....



Not sure which of these "puppies" has more HP & Torque! 22' Ebbtide has a 502 with roller cam, 850 carb & headers.

And I am certainly both Dazed and.... Confused.... & Verklempt!

 

[Tech Addiction]

Sorry, I was wondering.. but it could have totaly happened.

Off Topic, if you get rid of that third muffler I can see in the pic you will gain some ground clearance. LOL

 

[Tech Addiction]

Updated Times 8 Oct 2010

Took the Flex back to the track tonight. It was cooler but the Humidity was still high.

60ft....2.017
330....5.642
1/8.....8.714
MPH....80.19
1000...11.357
1/4.....13.602
MPH....100.44

Just 8 hundreths away from you Bob.. 8 lowsy hundreths. I did manage 101.01 on a 13.66 run and yes Traction Control should be left on. I had two runs with T/C off and both were 2.07 60 ft. Two runs with T/C on were 2.03 and 2.01. I would say that proves it.

 

[EcoBrick Bob]

By next weekend you will beat me......(maybe...)

That last run of mine, there were droplets on windshield about 3 min before...
Why do you think we have such a hard time getting the speed over 100?
With reasonably low 60 ft times, you would think there would be a few more miles of
top end. Aerodynamics play that big a difference??? Must be.....

 

[hawkeye18]

By next weekend you will beat me......(maybe...)

That last run of mine, there were droplets on windshield about 3 min before...
Why do you think we have such a hard time getting the speed over 100?
With reasonably low 60 ft times, you would think there would be a few more miles of
top end. Aerodynamics play that big a difference??? Must be.....

Short gearing in higher gears is just as important to dragging as short gearing in lower gears. Do the gears get taller as they go up (I mean, of course they get taller, but do they go from like 4.2 to 3.6, or do they go from 4.2 to 1.7)? Also, yes, even lowered, the Flex presents significant frontal area and a pretty high .Cd. These can be problems in getting those high-speed numbers.

 

[Tech Addiction]

Usually when you get a really good 60ft time it means you are not spinning any if at all. When you spin it slows you down on Et but when the tire grabs it is turning a lot more MPH so it raises your Trap Speed when you spin versus hooking up. What I don't understand is how you managed such a great Trap speed with a lower gear ratio due to your shorter tires. I should have a MPH on you with my taller tires. I had heavy moisture on the Flex by the last pass even though it was my best ET so far so I think the Humidity was up since the MPH was down. The MPH was lower on that best run both for 1/8th and 1/4. Like I said the 60ft was my best so it was spinning less.

 

[EcoBrick Bob]

I am assuming my setup with a 3.40 ratio should spool up quicker and shift into a higher gear. Mostly depends on where the Brick is in that gear and it's torque band when it goes thru the 1/4 mi traps. My Conti DW's really hook up, and seem to spin less than stock tires, even with the shorter gearing due to their 2" smaller diameter. Friends at strip said that there was a noticeable squeal when the Brick shifted, even with TC on.

On that 3rd run (my 2nd best) my friend's G8 spun his tires for 2-3 hundred feet, got the
17. and still hit 96 mph. Then the last run he beat me.

 

[Fishrising]

My turn is coming up soon!



Tune thanks to Torrie!

 

[EcoBrick Bob]

I thought about keeping my SCT Tuner under the hood like you, but decided it might get too hot, so keep it in the center console.... .:swing::swing::thankyou:

Have you seen what happens to the gauges when you try and tune the EB on the fly????

 

[Tech Addiction]

My turn is coming up soon!



Tune thanks to Torrie!

That Red thing and the Black box looks awefully familiar.

 

[Laminar]

Still the slide rule doesn't lie huh. It always takes X number of HP to move X number of weight through the quarter.

Not in the slightest.

You could turbocharge a Hayabusa engine to match the EcoBoost's "X number of HP" and it would barely be able to move a Flex, let alone get it through the quarter in any reasonable amount of time.

Quarter mile performance relies on the entire torque curve (where the Ecoboost shines) along with gearing, tires, etc. etc.

Online quarter mile/horsepower calculators are gross estimations, often incredibly inaccurate.

Horsepower sells cars, torque wins races.

 

[Tech Addiction]

I stand corrected.

 

[EcoBrick Bob]

That's what happens in our Boat... 22 Ebbtide - 3,500 lbs, 502 with water-cooled headers and a roller cam. Cam had to be special so as not to allow water inversion when turning off. Consequently, we have a stump puller that can get to 60 mph in under 12 sec. but runs out of torque over 4,800 rpm and mid 70's. If we could retard cam enough (moving the torque curve to higher RPM's), likely could see 80+. For comparison... as original, boat had a 300 hp -454, that maxed out at around 63 mph.

Torque is king!

That's why my Brick does the under 2. 60 ft times because I have smaller lighter wheels/tires which effectively gets more torque to the pavement.

In 1/4 mi, where I end up mostly depends on gearing. Ideally would like to end up at top of torque curve in final gear before going thru traps. But I really haven' thought that thru as to where I currently am at 100 mph....

Some of the G8's suffered from this when they shifted out of 3rd and into 4th just before the end... resulting in poorer times than those that held the car in 3rd, bouncing off the rev limiter, or changing it's limits so they wouldn't run out of gear.

Does this make sense???