After 600 miles with Racechip on the X5M.....

[onfireX5]

Time to check the integration at part throttle and codes, potential codes , etc.

Ltrims under 5% shows why the module is factory smooth at part throttle and transitions.

[onfireX5]

No hidden codes to cause problems later.

So far so good. Great power and factory smooth.

[jcfay]

Thanks. Do you mind explaining a bit about what you were looking for here? I just looked up fuel trims and dashcommand, but since I'm new to this I don't know what you're showing here exactly. Any insight appreciated. Good to hear the mod is working great!
--------------------
Edit: also, what OBD-II monitoring hardware are you using? This is real-time monitoring? Thx again

[AlexLou1222]

So does this improve fuel economy?? XD

[onfireX5]

Originally Posted by jcfay

Thanks. Do you mind explaining a bit about what you were looking for here? I just looked up fuel trims and dashcommand, but since I'm new to this I don't know what you're showing here exactly. Any insight appreciated. Good to hear the mod is working great!

I manually tune my other turbo cars with specific software. Went with the RC module since it is s modest boost increase and plug and play. So I have been logging boost, timing , trims etc to see how "happy" the factory DME is with RC. Strims/ltrims modify the fuel enrichment based on the base table. Under 5% correction is s typical OEM spec if everything is integrated properly. I have seen other platforms go to and over 15%. This causes stumbling, dead spots, etc and does not function well.

RC is doing a good job.

[onfireX5]

Originally Posted by AlexLou1222

So does this improve fuel economy?? XD

Possibly a very small increases due to the increase in part throttle torque. But my guess is 1 mpg or less. Stock system is pretty sophisticated.

[wbrinker]

Originally Posted by jcfay

Thanks. Do you mind explaining a bit about what you were looking for here? I just looked up fuel trims and dashcommand, but since I'm new to this I don't know what you're showing here exactly. Any insight appreciated. Good to hear the mod is working great!
--------------------
Edit: also, what OBD-II monitoring hardware are you using? This is real-time monitoring? Thx again

Vt

[onfireX5]

Originally Posted by wbrinker

Vt

I bought the Baravian cable (waste of money).

Then I bought the GoPoint BT1 and added DashCommand. That works ok to real time monitor and also real time log OBD2 parameters. This works well to monitor changes for a modest add on tuner box like the RC. It also verifies that the shift point safe guards are still intack, etc. which makes the RC a nice box.

I am spoiled with the other software that I use to manually tune different platforms. The resolution is soooo much greater and is necessary when you start manually changing parameters and need finite response feedback.

On the BMW DME, the two MAF sensors are draw through and give a first tier estimate of airflow, then the DME compares that to a VE table and VE calculation and fires the fuel injectors by pulse width, then the wideband O2 sensors measure the actual AF ratio and fine tunes the injector pulse width based on short term fuel trims (strims) , which set long term fuel trims (Ltrims) over a number of firing cycles. When you log the Ltrims under 5% it shows RC did their homework to integrate the module very well. The Ltrims are low and linear which is why you do not feel and part throttle stumbles, etc. Smooth as stock, just more HP.

[Ehloo]

have you messed with the settings yet

[onfireX5]

Just to fine tune for my elevation. I wanted 2.75 - 3.0 psi to put it at 700ish engine hp.

[Ehloo]

Would you mind sharing your settings. Installing mine tomorrow

Do you know what each setting changes

Originally Posted by onfireX5

Just to fine tune for my elevation. I wanted 2.75 - 3.0 psi to put it at 700ish engine hp.

[onfireX5]

S1 should always remain at 1

S2 comes from the factory at B

Leave it in B and test drive. If you can log data, log boost vs rpm.

If you can not log data I would leave it on B.

Each click up to c,d, etc will increase boost 0.50 - 0.75 psi roughly.

[Kzang]

Originally Posted by onfireX5

S1 should always remain at 1

S2 comes from the factory at B

Leave it in B and test drive. If you can log data, log boost vs rpm.

If you can not log data I would leave it on B.

Each click up to c,d, etc will increase boost 0.50 - 0.75 psi roughly.

onfireX5 is your current setting at S2: D ? If so, I am assuming it is still smooth?

I have a 35i with MPPK with Racechip setting on S2:C for 6 months so far and I am thinking about moving to D.

[onfireX5]

Yes. D is factory smooth. If it wasn't RC would be removed. It's all a balancing act though when you exceed B. At some point increasing boost over a modest amount (2.5 -3.0psi) is going to cause issues. You could cause a rough stumble as it transitions into boost, you could exceed octane limits and the DME will pull timing and power even though it could still be smooth, you could exceed the MAF hertz limit and set a code, you could exceed the map limit and set a code. None of the above will cause damage if you are smart and pull it back when it happens. But you must log data to see what is happening if you exceed 3.0ish boost over stock to insure everything is working well. My M took D to get 2.5-3.0 increased boost. Another M might get there at B.