Quote:
Originally Posted by Benh13
Just purchased an F30 335i xDrive auto with 50k miles. I'd love to get started with some mods but I'm concerned about the mileage. Is there anything I should do to ensure the car can handle the mods before I start applying them? I'm looking to do a chip (Dinan stage 2 or jb4) and an intake. Exhaust down the line ideally. Curious to hear everyone's thoughts.
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This is an outdated approach. I recommend you spend a couple of hours doing research. The N55 engine technical forum is the place for this, not the general forums. Since you're new ill help you.
1. Do plugs, OEM bosch, dont need NGKs or smaller gap. Read my posts on DIY stuff for plugs here:
https://f30.bimmerpost.com/forums/sh....php?t=1709198
2. The normal routine mantainance - oil change, etc. Trans fluid is 75k miles unless you want to do it early (per new ZF guidelines). You dont really NEED anything else unless the car was abused. A good service history is key. Brake fluid if its been more than 2 years.
3. Charge pipe and IC. If you are going to go VRSF. spend $40 more and get the next step up from the 5''. Do not go any further with tunes or other upgrades until you have done this.
4. Choose your tune - basically MHD or BM3 is the way to go. Spend some time researching, then choose. Can't go wrong with either. I run MHD, but i dont want to turn this into a tune debate thread, so BM3 is fine also. JB4 and other piggybacks are completely outdated and unnecessary unless you are in warranty, want them for something like meth control or user controlled boost, etc.
Flash stage 2 MHD or stage 1 BM3 once you have IC+CP installed. Enjoy this for a while. Then...
5. Downpipe - do research and pick catted or catless, and a brand, depending on your budget, emissions needs, etc.
6. Flash stage 2+ MHD or stage 2 BM3 after IC+CP+DP
7. XHP flash for the trans. I recommend straight to stage 3.
Car will be a beast at this point, the rest are the icing on the cake.
8. Turbo inlet - high recommend MST. Read my post here:
https://f30.bimmerpost.com/forums/sh...&postcount=173
9. Turbosmart DV if your DV is showing signs of bleeding boost.
You do not need an intake and you do not need an exhaust. These are not power mods. They are only for noise. You can read my thread on intakes here:
https://f30.bimmerpost.com/forums/sh....php?t=1765289
After you get the mod itch again, get a front strut bar. Recommend an adjustable one to be able to preload.
At this point if you REALLY want to go further, you are into HPFP upgrade and/or upgraded turbo. So consider how long you will keep the car.
Oh, and at each step of the way, datalog extensively before and after each mod. Highly recommend reading my thread on datalogging here:
https://f30.bimmerpost.com/forums/sh....php?t=1732327
This info should save you easily 5-10 hours of research.