[Zero335]

Hi all,

What would you recommend for 335i ECU tuning, I am researching into this and would like to buy a piggy back device, there are quite a few options out there, what are you using / pro's / cons.

I've heard good things about the JB4. where are the mappers / Tuners in the UK for N54 Engines? any recommendations ?

Thank you!

[namsu2430]

Hi

I wouldn't bother with JB4 or other piggyback systems. You're better off going for the MHD super license and starting with stage 1 and doing some logging first. And see how your car handles it.

[coleybmw335]

Hi,

MHD is easier as its through the OBD port, You can also have custom maps through tuners on MHD, or just use the OTS maps

[Zero335]

ok thanks very much, wow, this is crazy to believe an APP has overtaken the tuning game for n54/ n55s! must be pretty reliable and safe if a lot of you guys have gone for this option.

thanks again!

[Smokey33]

Well its a proper ECU flash, rather than the Jb4.

MHD is great. Once you change turbos then you want a custom tune which you can do through MHD. I recently fitted 17T turbos and it made 565bhp and nearly 800nm on the dyno.

[Cloverdale]

Appreciate that the JB4 is providing boost safety when it interferes with my Map 5 use when it detects something of concern, but it sure is annoying! Not sure if MHD use provides an adequate level of safety in this regard?

[Zero335]

Originally Posted by Smokey33

Well its a proper ECU flash, rather than the Jb4.

MHD is great. Once you change turbos then you want a custom tune which you can do through MHD. I recently fitted 17T turbos and it made 565bhp and nearly 800nm on the dyno.

wow, that's awesome. where are the customer tune / mappers for MHD? glad to hear it's stable and owners here are positive about it too.

gives me confidence to give it ago.

thanks again!

[Smokey33]

Originally Posted by Zero335

wow, that's awesome. where are the customer tune / mappers for MHD? glad to hear it's stable and owners here are positive about it too.

gives me confidence to give it ago.

thanks again!

Most use guys in the States.

[Saif2018]

Originally Posted by Cloverdale

Appreciate that the JB4 is providing boost safety when it interferes with my Map 5 use when it detects something of concern, but it sure is annoying! Not sure if MHD use provides an adequate level of safety in this regard?

There are several safeties mapped in by tuners, OTS maps are also pretty safe and conservative