01-10-2015, 07:26 PM | #1 |
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RaceChip Ultimate F15 X5 35i Installation DIY
I thought I would share how to install the RaceChip Ultimate on the F15 N55 engine since the instructions included are severely lacking.
I'm going to consolidate some pics from other posters as it's similar to other piggy back installs. In the box you will get the RaceChip module and 2 wiring Harnesses: The reason for 2 harnesses is because there are 2 types of connectors used in F15 vehicles, depending on when yours was manufactured. The weird thing is the ones that don't fit actually have the same grooves as the OE plugs, so don't rely on that as an indication of which harness to use. The correct harness will "click" in. On my 2015 the Purple harness was the correct one. *NOTE: They come shipped with the Dummy plugs connected to the harness (they are wrapped in heat shrink. Take these off before attempting to plug into the RaceChip module). The Harness has 2 "Y" connectors (4 connections total). One for the MAP Sensor pictured here: This requires you to remove the air filter box using a flat screwdriver to loosen up the hose clamp and Torx T25 for the 6 screws on the airbox. It will look like this: Close up of the MAP sensor behind air box: and the other for the TMAP sensor pictured here: Here are both plugs in relation to the engine bay: At each location you simply plug the appropriate "Y" plug into the engine connector and the other intercepts the factory plug. Now you simply plug the harness into the RaceChip module and zip tie everything securely. At this point you should start the car and drive it around. If everything seems OK and no engine light comes on now you can move on the increasing the power. This is where the manual make a little more sense. However, being that the manual talks in generic terms it will mention that on the S2 dial "0" is factory and turning it to "1" is a 22.5% (or so) increase in power. That's fine if yours is shipped with an initial setting of "0", but mine was shipped on an initial setting of "B". Bottom line is when increasing your tune, it is recommended to turn one click on the dial from your factory setting and then drive the car to allow it to adapt. opasha posted this procedure which I would recommend to obtain the best setting for your individual vehicle: (1) open up the box using a T10 torx screw driver. (2) look for the dial marked "S2". The dial will have alphabetical and numerical markings. The most important thing to remember is that position "8" is the minimum power/torque setting and position "7" the maximum. Each notch clockwise, according to RaceChip, adds another 1.5% of power/torque. (3) leave dial "S1" alone i.e. don't make any adjustment to it. (4) look at dial "S2" and see what the default factory setting is. (5) to tune the box for increases in power/torque, turn the dial "S2" clockwise one notch at a time. (6) after each step increase, start and drive the car a bit to check if there are issues or not. (7) if step (6) was ok, drive normally for sufficient kilometers (say 50 ~ 100) to let the ECU adapt. (8) if there were no issues after covering sufficient kilometers, take the car for a stress drive before increasing another notch in dial "S2". By stress drive, I mean the engine should reach 6000 rpm. What I did was to switch to manual and ran in 4th gear. (9) if step (8) was ok, repeat from step (5). (10) eventually, you will reach a setting in dial "S2" when the drive becomes less smooth and or according to RaceChip, the CEL may pop up. When this happens, turn the dial two notches anti-clockwise and that will be the position for best power/torque for your car." That's it. If you have any questions just reply or shoot me a PM. I would also like to thank opasha and r33 for their pics and posted information used in this post. Last edited by pdawg; 01-10-2015 at 07:54 PM.. |
01-10-2015, 07:32 PM | #2 |
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Great write up, my friend! This is very helpful to the community. Just to add, for the 50i, I had the same stock settings S1=1 and S2=B for the chip. My harness was also the pink/purple (8720) one used for my two MAP sensors. Note, these also fit into the MAF sensors so good thing you noted that so people don't plug into the MAF.
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01-12-2015, 10:25 AM | #4 |
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If I bring it in for service, the piggy back is coming off. Alternatively you can just install the dummy plug, which will not alter signals. Firmware updates would not talk to the racechip.
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01-20-2015, 09:16 PM | #5 |
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Great write up pdawg showing this to a fellow F15 35i owner from the bimmerfest board!
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01-21-2015, 02:31 PM | #6 | |
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Performance Level 1: D1 Performance Level 2: E2 Happy testing.
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01-21-2015, 03:08 PM | #7 | |
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01-21-2015, 10:23 PM | #8 |
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01-21-2015, 10:35 PM | #9 |
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No, this refers to us with 35i and 50i since our stock is S1=1, S2=B.
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01-21-2015, 10:37 PM | #10 |
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01-21-2015, 10:45 PM | #12 |
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Just so everyone is on the same page regarding these new setting updates. It's all just simple math that they applied in general to all engines.
30/35d: stock comes as S1=0, S2= E 35i/50i: stock comes as S1=1, S2=B Performance Level 1 - they simply bumped S1 for diesel by 2 and S2 for petrol by 2 - the same tests we all have been doing and discussing - old news. Performance Level 2 - they simply bumped S1 for diesel by 3 and S2 for petrol by 3 and bumped S2 for diesel by 1 and S1 for petrol by 1. I hope that makes sense...most likely they've been lurking and following multiple boards and they came up with a safe margin for all engines with the simple math above based on everyone's feedback. If they actually did real world tests, great. Either way...it's pretty straightforward. If you choose to go above and beyond each, that is up to you .
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01-21-2015, 11:38 PM | #13 |
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Hmm very cool. I'll Give E/2 a try. 5/1 is doable although it threw a Air flow code (but light went off later) and power isn't as smooth as stock, but definitely more powerful. still drives fine for Mom and the kids on comfort mode.
I'll try S2=E/S1=2 on Saturday or sooner and report back. |
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01-21-2015, 11:57 PM | #14 | |
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01-22-2015, 02:20 PM | #16 | ||
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01-22-2015, 02:32 PM | #17 |
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Rob - the recs are based upon the setting they shipped with. The posts above are for petrol and deisel. The deisel ships at E0 and the petrol at B1. Accordingly, I have posted the recommended settings for both.
The next steps for petrol are D1 then E2 for deisel it's E2 then F3. |
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01-22-2015, 02:53 PM | #18 | |
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Test with my Torque App I just got thanks to opasha also 0-60.. I know N20 on the X3 is totally different but nobody else knows more about RaceChip than you guys here appreciate all the information being shared here and testing.
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01-22-2015, 04:54 PM | #20 | |
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01-22-2015, 05:00 PM | #21 |
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Rob's stock settings for his 28i are S1=1, S2=C . As always, thanks for the updates, JP .
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01-22-2015, 09:03 PM | #22 |
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Do you know what the S1 and S2 control?
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