Racechip Ultimate On X5d

[DETSGTSTARSKY]

I have a 2011 335d currently. Thinking of getting a 2016 X5d next summer. Where we live the diesel is .24 cents cheaper than premium gasoline right now. It usually stays lower than premium by a 10-30 cent margin. I would consider the X5 50 but like the mileage of the diesel when we take trips to the coasts. I would like to buy an X5M50d if we could here in the U.S. for the 381hp and 546 ft lb of torque. But wanted to see if anyone is using the Racechip Ultimate on an F15 chassis X5d. Their advertising gets it closer to those numbers. If so did you dyno test the vehicle before and after install to see what actual results are? Thanks.

[oshiri]

http://f15.bimmerpost.com/forums/sho...light=racechip
http://f15.bimmerpost.com/forums/sho...light=racechip
http://f15.bimmerpost.com/forums/sho...light=racechip
http://f15.bimmerpost.com/forums/sho...light=racechip
http://f15.bimmerpost.com/forums/sho...light=racechip

Did a quick search of the forum and found those threads. They are in order of usefulness (top to bottom) IMO. Should cover everything you need!

[ABE2(aw/sw)]

I was on the same boat as you. I bought the RC from Ben and I love it a lot, must have!

[cobra006]

What settings are you running and how many miles have you driven with RC on ?
No CEL or other issues ?

[ABE2(aw/sw)]

Got it 2 weeks ago, lol. I have it on E/2. That first link that oshiri gave you is very informative.

[Trojanlaw]

I have found 03 to be the best overall. Have been running it for 10 months without issue.

JP

[cobra006]

^^^ Thanks. Good to hear. What's your 0 - 60 time like ?
Do you use sport mode or comfort ? One thing I found lacking in comfort mode is the more laid back acceleration from 0 - 30. Once I reach 2k RPM it gets up and goes faster. I can imagine with RC, it probably solves that problem and you probably have less need to go into sport mode ?

[42pilot]

Originally Posted by cobra006

What settings are you running and how many miles have you driven with RC on ?
No CEL or other issues ?

I have about 5,000 miles on mine.

Always start with what the factory recommends, then experiment from there. Otherwise, you have no baseline from which to compare, and the reseller/distributor will ask you to reset to factory in the even you have a CEL and you'll have to start all over again.

I have had lots of CEL but I experimented and I also have the tools to clear the codes. The two most prevalent codes are too rich condition (emissions - I forget the code) and fuel pressure too high (fueling - code P026D). I do not recommend increasing S1 setting unless you lease the car. S2 is the amount of fuel injected and each click is 1 1/2% change.

Dyno'ing is a waste of time/money on this. You'll feel the difference immediately and that's what counts - especially for the cost of the unit. Besides, throttle response is much more important for the majority of us using these as daily drivers.

Have fun.

[cobra006]

Thanks , that's what I plan to do , run on the default setting to start.
I do have a tool to clear CEL too, but I'm wondering, even after I clear the code, is it still stored in the car ? Can the dealer still see it later if they were looking ?