BMW M135i tuning chip

[strippier]

Looking to possible tune my M135i (auto) as now out of warranty.

Was talking to these http://www.motorsport-developments.co.uk/ (based near me) and wonder what the general consensus was on tuning in general and these in particular?

Reckons a £350-£500 upgrade (chip) will achieve 50bhp and 90 Newtons?

TIA

[Andy OH]

Have a look on www.babybmw.net as there will be a lot more info on there

[KPB1973]

Most people who tune a M135i go down the Burger Motorsports 'JB4' route. Pretty easy to fit and very effective.

[Silverbullet767]

KPB1973 said:

Most people who tune a M135i go down the Burger Motorsports 'JB4' route. Pretty easy to fit and very effective.

Very much this, I have one in my 335i increased from 306 standard to 373 (dyno'd) on map 2. I keep mine on map 1 for day to day which is around the 350 mark.

Switchable from the steering wheel on the go. Google it.

[FurtiveFreddy]

Silverbullet767 said:

KPB1973 said:

Most people who tune a M135i go down the Burger Motorsports 'JB4' route. Pretty easy to fit and very effective.

Very much this, I have one in my 335i increased from 306 standard to 373 (dyno'd) on map 2. I keep mine on map 1 for day to day which is around the 350 mark.

Switchable from the steering wheel on the go. Google it.

I'd recommend the JB4 as well. I stay on map 5 the whole time. No issues in over 20k miles.