[technics_13]

Hello mates,

I have a 14 535i with a N55 M sport - I have replaced the exhaust with F10 M5 exhausts (got em off a 40k M5) - The car sounds a bit heavy with the exhaust and has some vibration too.

I wanted to get/configure Burbles on my car and have heard MHD tune is needed for it. From what I found so far, MHD can be done as Stage 1 or 2 but they do have an option of just tuning Burbles on stock map..


I have some questions:

1. What all parts/hardware do I need to install say Stage 1 map? (apart from the cable/adapter which I have, I could not see a clear guidance on what all is needed for a tune)
   
2. PREFERRED (as I wont have to go to a shop - $$): Can I just keep the stock map and configure only the MHD burbles? will keeping things stock - hardware wise mess the car, how bad are we talking ?

Appreciate the responses folks!! Cheers

[CrippledLucifer]

Originally Posted by technics_13

1. What all parts/hardware do I need to install say Stage 1 map? (apart from the cable/adapter which I have, I could not see a clear guidance on what all is needed for a tune)
   
2. PREFERRED (as I wont have to go to a shop - $$): Can I just keep the stock map and configure only the MHD burbles? will keeping things stock - hardware wise mess the car, how bad are we talking ?

1. Stage 1 tunes are software based remaps. You generally don't require any other hardware for it. I would however STRONGLY recommend swapping the stock plastic charge pipe with an aftermarket aluminum one. The stock ones are notorious for blowing even on factory boost levels. I myself am running a Stage 1 BootMod3 tune with just an upgraded chargepipe for peace of mind. I would also recommend replacing your spark plugs with NGK SILZKBR8D8S (97506) since these are one step colder plugs. You can also look into replacing your coils depending on your mileage. It's a good idea to be sure you're on top of all other maintenance items too before tuning anything.

2. You certainly can keep the stock map and you can definitely configure the burbles. I have also done this but it comes with a word of caution. I STRONGLY recommend to not make your burbles too aggressive because doing that WILL inevitably ruin your factory cats by melting them. For BootMod3 owners, PTF suggests keeping the burble aggression to below 5 (on a scale of 1-12) with the stock downpipe. I'm not familiar with the MHD platform but I suspect they will have a similar suggestion. High-flow cats or a cat-less downpipe are the only solution for more aggressive burble tunes.

One last note, Stage 1 maps IMO really wake up the 535i. For a simple software remap, the additional power/torque figure are quite nice and wake up the car. Why not flash the car with a Stage 1 tune and see how you like it? It's not like you can't flash back to stock if you don't like it. Burbles or not are irrelevant in this case! I'm sure you'll appreciate the performance gain, I know I did.