13.739 sec 1/4 Mile Sprint Test Result

**gr8titan** · 10-01-2005, 12:38 PM

As I ended up my procastination, I went to Evolution Performance during one of their scheduled "dyno days". I am very aware of the stock HP/torque numbers on a "Dynojet" courtesy of TT member GETSOMZ28 so I was excited about the outcome.

However on my way to Evolution Performance, my SES light came on. I could kick my self but thought this may be an opportunity to study the performance differences on how the Titan performs with the SES light on and light reset.

Below are the results of the dyno. The graph with lower #s is the dyno with the SES light on. With the SES light on, my Titan 1.5 less HP and 5.6 less torque.

Interestingly, on the simulated 1/4 mile sprint, my Titan crossed the line in 13.739 seconds. OK I know I'm extremely excited knowing this is too good to be true but how much time do we give-up for track conditions, specific lane traction, elevation , outside temp/humidity & wind resistance? Anything else I overlooked? If everything else considered, could my Titan do a sub 15 second 1/4 mile run on the track?

Constructive opinions are sought

*Boogers* · 10-01-2005, 01:06 PM

Reaction time has NOTHING to do with your ET. Another thing... did you factor in drag? I'm gonna have to go ahead and say "BS" on the 13.739 being obtainable at a track. Add about a second to that figure.

yellowv · 10-01-2005, 01:21 PM

Nice numbers. I would take 1/4 mile time with a grain of salt though. On a Mustang dyno those are some strong dyno numbers maybe a bit high. Assuming they are accurate you probably would be around 290rwhp and 365rwtq on a Dynojet.

**gr8titan** · 10-01-2005, 01:43 PM

Quote:

Originally Posted by Boogers

Reaction time has NOTHING to do with your ET. Another thing... did you factor in drag? I'm gonna have to go ahead and say "BS" on the 13.739 being obtainable at a track. Add about a second to that figure.

Exactly what I was asking! The 13.739 sec is just a simulated 1/4 mile sprint not considering actual tract conditions.

The question is this: (just to be clear) I wanted to know IF "drag" (aka "wind resistance") PLUS ALL the other real life track conditions would make a "sub-15 sec" 1/4 mile time (AKA 14.9999 sec) attainable?

Your post however is very encouraging. It projects an attainable sub-15 second 1/4 mile at 14.739.

Considering the dyno was done using the Mustang Dynamometer vs the Dynojet, is the potential for better actual ET's markedly improved? This thread, post #10 by respected TT member JetTech says there is a difference.

Vyrus · 10-01-2005, 02:09 PM

That time is not considering weight. Even if you have the best of all conditions, you will never get close to a 13-second 1/4 in a stock/mildly modified Titan.
-Cyrus

**gr8titan** · 10-01-2005, 02:54 PM

Quote:

Originally Posted by Vyrus

That time is not considering weight. Even if you have the best of all conditions, you will never get close to a 13-second 1/4 in a stock/mildly modified Titan.
-Cyrus

They factor the weight of the truck into the dyno/computer program. The 3rd pic of the first post shows the computer input for weight of the Titan at 5500 pounds. It determines the drum resistance against the spinning tires.

phillipyang · 10-01-2005, 03:06 PM

Friction, wind resistance, traction, elevation, heat would all have to be factors in this dyno.

Vyrus · 10-01-2005, 04:42 PM

Also I'd love to see a Titan who traps 92MpH be in the 13s... the head runs 13.7@98.1. I just wouldn't get your hopes up based on those #s... they are more than likely very far from reality. I have a similar truck to you, 4x4 Crewcab (though mine is mostly stock), and run 15.9@87. Now I know I can do much better, but there is no hope for 14s let alone 13s.
-Cyrus

Vegas04 · 10-01-2005, 05:28 PM

probably, the computer program that simulates a 1/4 mile run factors a coefficient of drag that would be more applicable to a sports coupe. That might be why it projected such a fast time when we all know that just getting under fifteen seconds normally aspirated without juice would be a real accomplishment.

**gr8titan** · 10-01-2005, 06:25 PM

I apologize if I was not so clear with my goal in the 1st post. We all know that the 13.79 sec 1/4 mile dyno time was simulated and does not reflect actual tract conditions in any way and in no way am I going to insult anybody's intelligence by insinuating that this is attainable at the track by the same vehicle.

Having said the above statement, my question was: How much time would we give up (AKA: time to add onto 13.79) IF we consider other real track factors like:
1. Track surface conditions
2. Ambient temperature, humidity, altitude
3. Aerodynamic forces e.g. wind resistance, tailgate up, mirrors not folded
4. Actual vehicle weight at the time of ET
5. Etc. etc.

So the specific question should probably be this: Considering the above 5 factors, is an 1/4 ET of 14.99 seconds (sub-15 sec) attainable at the track with a Titan having a Mustang dyno of 272.9HP@4750 and torque is 347.3@3750?

I plan to go to the track this month and see how much these factors add to the simulated dyno ET. I'm guessing between 1-1.5 seconds but I'm hoping just 1 second.

Vyrus · 10-01-2005, 06:32 PM

Quote:

Originally Posted by gr8titan

So the specific question should probably be this: Considering the above 5 factors, is an 1/4 ET of 14.99 seconds (sub-15 sec) attainable at the track with a Titan having a Mustang dyno of 272.9HP@4750 and torque is 347.3@3750?

I would say YES, but your conditions would have to be amazing (which of course does happen at the right track).

Now of course you have to realize the questions you posted above always depend on the extent of the strip. You can run in optimal conditions, or normal conditions. The difference in conditions usually result in around a .5 to 1-second difference between the two. That's why I don't believe that the estimator is flat out reliable at all. However I would love for you to prove me wrong and run a 14.5 1/4!
-Cyrus

**gr8titan** · 10-01-2005, 06:55 PM

There's no right or wrong here as I do not know what my Titan and I can do at the track. I'd love to break the 15 second barrier in a NA Titan but would be satisfied with a low 15. I just wanted to get input on how it can be done (bar NOX and SC) to achieve 14.99 ETs.

Here's what I have:
1. Straight thru dual glasspacks, short run 2.5" diameter, x-pipe, Mandrel
2. Secondary cat delete
3. Volant 2nd gen with custom second cold air intake pipe
4. All synthetic Mobil 1 lubrication
5. Reset the ECU prior to the run (good idea or bad?) My power pulls indicated a torque gain of 5.6ft-lbs after ECU reset

MOTO-MAX-TITAN · 10-01-2005, 09:00 PM

I only have a K&N drop in filter, the rest of the truck is stock..
I went 15.69 @ 89.?? mph.
That was with a empty tank(gas light on).
Spinnig the tires and a additional 230 lbs passenger.

SmokenTitan · 10-02-2005, 12:38 AM

gr8titan - find a local strip that does weekly test and tune and find out. There is one near my house that only charges $15 for however many runs you can make in the time they are open. They do Tuesday and Thrusday nights, usually Tuesday's are slower...

I would think sub 15 should be attainable under the right conditions, my stock SE CC with BT/UB and what not pulled a 15.47...

**gr8titan** · 10-02-2005, 03:27 AM

Smokentitan and MOTO-MAX-TITAN, Thanks for the info.
Smoke ran 15.47 in a stock CC. MOTO ran his stock + K&N filter in 15.6 with a 230 lb passenger. Much need info that gives me positive outlook. With my above mods, I'd love to have a perfect day at the track and hit

the 15.0 second barrier in a NA Titan. Hoping to do it this month and I'll keep my fingers crossed till then.