TRF Performance X5 35D Stage 1 flash tune

[35Disel]

You're right, i got 26.7 on the highway, but that's after a few pretty heavy pulls that I had before I got on a freeway. I guess that affected average mpg, or not... In either case it is huge improvement in overall vehicle performance.


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[Ozer]

Originally Posted by 35Disel

You're right, i got 26.7 on the highway, but that's after a few pretty heavy pulls that I had before I got on a freeway. I guess that affected average mpg, or not... In either case it is huge improvement in overall vehicle performance.


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I wish i could do it but i live in NYS and we have emissions, otherwise i would love to. The sound and performance will be worth every penny. Have fun!

[blue dragon]

Same here.

[35Disel]

I live in NJ but had no choice. My inspection expires in the end of this year so I need to figure something out by that time...


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[Ozer]

In NJ im sure you will find willing individuals to make something work for the right amount of money
Or, get a dealer license if you can and get rid of your insurance and plate. Dealer plates dont require the car to have an inspection sticker.

[josiahg52]

After many delays on my part and waiting until the last minute in my schedule, I FINALLY got my DDE sent in and the Stage 1 tune installed on it. Due to heroic and very appreciated efforts by Kirk and the tuner, I sent it on Tuesday last week and it was back in my hands on Friday. Removal and installation of the DDE was a cinch barring an issue I caused myself which I mention below. Based on advice and after reading about more than a few flooded DDEs, I drilled two 1/8" holes in the very bottom of the DDE enclosure prior to reinstallation.

There is more of a difference than I expected. The 1 and 2 shift is very much improved and after that it just keeps pulling and pulling. Passing acceleration is affirmative and sure. I only have a little over 50 miles on it so I'll have more to say later but I am very, very pleased.

As I mentioned, there was only one problem. Due to rain, I had to close the rear hatch after disconnecting the negative battery terminal connector. As there is no mechanical release, this is a problem. Connecting a battery to the jumping terminals under the hood did not work. I had propped the trunk floor open before closing the hatch and with the rear seats folded down, I was able to use a piece of wood with a clothes hanger taped to it to touch the connector to the negative terminal and get the hatch open.

[Tuesday]

Originally Posted by Ozer

Your avg speed was 64mph so almost all highway looks like.
I get close to 29 mpg in similar situation. 29.6 mpg i got once on full tank, all highway driving. Im sure it helps with mileage but 26.7 seems normal for me.
2011 x5d is what i have with 117k miles

Is that with the stage 1 tune only? I just bought a 12,first tank 496 miles,21.5 gl=23.25 mpg.Quite a bit of idling wth AC on.Mixed driving.Its a blast!
If stage 1 what was it getting before the tune?

[bawareca]

There are not any significant gains to be expected with Stage1. Just more fun to drive

[Tuesday]

I wasn't aware these truck would get that fuel mileage on highway .

[josiahg52]

On the highway, I usually get over 28 mpg, even 30+ sometimes. This is OBC mileage; the calculations are always different and all over.