It has begun.....

[998M]

Originally Posted by stlcity

Those are impressive numbers: shaved off close to a minute on 0-60 from the road test numbers I have seen around.

How tough is it to flash the tune? Have u noticed any untoward effects on the vehicle or difference in its ride? Just weary if the process is complicated and the factory warranty void issue

I know this is a taboo to ask: but has the fuel consumption increased significantly since the tune?

The flash is very easy. You do need a high quality battery charger. Do not skimp here. No trickle charger. I bought one for $100. Worth it. The directions suck and need to be updated. I let ESS know. Not sure what they are going to do about it. I bought my upgrade from IND. So when I went to put it on, I did it during their business hours. If I had any question, I called to make sure I was doing it correctly. Great service from both IND and ESS.

The power comes on much sooner. I do notice a few little things. For example, taking of from a standstill. At a light and coming off the brake to the gas. Sometimes the truck has a little jump. Never happened with stock tune. Happens only rarely with ESS tune and does not bother me. But I had someone in the car a couple of times and they commented on it.

Fuel consumption seems to have dropped about 1 mpg. This is very unscientific. I happened to notice the mpg before the tune and after. I maybe driving it harder now with the tune so take it for what it is worth.

I am not terribly concerned about reliability. I feel that if you have the tune and are driving the truck like normal you will not have an issue. Normal is on public roads and dipping into full throttle periodically. Now if you are tracking the truck and pounding the snot out of it. Then there may be more of a concern.

[stlcity]

Thanks guys. After I get the truck and drive it around I might just consider the ESS tune. Will call the company before and go thru the steps before trying anything out....lol

[donho]

I think there is something wrong with the truck???
It drives fine and if i was not using a timer, I probably would never know.
But MPH is way down. Which means HP is down.
It still 60fts harder then ever and it ran one of the best 0-60s ever
It pulled a 1.67 60ft
It went 3.60 0-60
But only [email protected]????
and it was 43 degrees out and only 70% humidity
It ran faster when it was hot out.
Considering the low end is faster then ever, but the ET and MPH are off, I have to assume HP is down.
I know the system is adaptive to octane, so possibly I had a shitty batch of gas?? Granted I have all my Bowhunting equipment in the back, but how much added weight can that be? maybe 30lbs tops

I think I might pull the tune and bring it in to the stealer for a diag.
Something has to be holding it back.
I took a vid of the dash during the pass. Sorry, it is a phone vid, not a GoPro, so it is not that great
View My Video

[TahoeM3]

Traction may be a factor if it gets too cold for the tires you are running. Also, you might want to check the air filters to make sure they aren't getting dirty and limiting power.

[998M]

donho,

When you say "way down", are you talking about 4 mph? I would love to witness that conversation with the dealer. "So I had tuning software on it. For some reason it is only hitting 115 in the 1/4 mile. So can you fix it and then I will put the software back on and see if it works right now."

M

PS. When you are there. Would you tell them the sunroof wind deflector should really retract at 110 not 130. By the time you hit 130 it is really making a lot of noise.

[998M]

Originally Posted by TahoeM3

Traction may be a factor if it gets too cold for the tires you are running. Also, you might want to check the air filters to make sure they aren't getting dirty and limiting power.

If traction was down, wouldn't the 60 foot time be off? Only other thought would be air density. This would effect higher speeds but I have not idea how much.

M

[TahoeM3]

Originally Posted by 998M

donho,

When you say "way down", are you talking about 4 mph? I would love to witness that conversation with the dealer. "So I had tuning software on it. For some reason it is only hitting 115 in the 1/4 mile. So can you fix it and then I will put the software back on and see if it works right now."

M

PS. When you are there. Would you tell them the sunroof wind deflector should really retract at 110 not 130. By the time you hit 130 it is really making a lot of noise.

If he had the sunroof open that would certainly explain the loss in MPH in the 1/4, but I didn't hear that much noise...was it open?

[998M]

Originally Posted by TahoeM3

If he had the sunroof open that would certainly explain the loss in MPH in the 1/4, but I didn't hear that much noise...was it open?

That was me being funny. Don't think he had it open. But it does retract at about 130. Not sure of exact speed. I was a little busy at the time. It kind of startled me.

[TahoeM3]

Originally Posted by 998M

That was me being funny. Don't think he had it open. But it does retract at about 130. Not sure of exact speed. I was a little busy at the time. It kind of startled me.

Yeah it looks like the 60 ft time was the same as it was last time, but the 0-60 is slower. That could happen if the traction breaks after the first 60 ft I suppose, or if the cooler weather gave added horsepower which offset the traction loss. Both hypothetical, but could explain it. Either way, the numbers are still very good. I would tend to think there's nothing wrong with the truck and given a bit better conditions he would post similar numbers to what he posted previously.

Also, keep in mind that the ECUs on modern vehicles are very adaptive. If you drive slowly for a while it will adapt to that and response might not be as quick, whereas if you are more aggressive the ECU will plan for that and might respond more quickly.

[donho]

Holy crap. You are right. The low end is down as well. For some reason i thought it was better. The 0-60 is slower.

I do not know if the air could have been better then last night. All the other passes I made in the truck were in warmer weather and higher humidity. last night I thought was going to set a personal best and I was pretty upset at how it ran

with the slower bottom end and the loss of MPH on top, the truck is down on power. When I first had the tune in, on a warm night, it broke 116MPH. Then when it got cooler, it hit 119. Now with great air, I am only in the 115 range?
By the way the filters are clean. I just checked them. They look new.
I am going to get gas at the same local gas station I usually use and try it again. The only thing it can be is the octane was lower. A bad batch of gas. If that doesnt pick it up, then it is something mechanical.

and if the system is adaptive to driving styles, then it should be faster then ever. I am pretty hard on this truck on a daily basis.