23/05/2023
Monster F10 BMW M5 in for a stage 1 ECU tune and dyno power runs! This particular car was a return customer who's BMW 335d we tuned and dyno'd (scroll down our page to see the old post).
After our session, the car made a huge 708bhp and 869nm of torque. That's +126bhp and +157nm.
We saw a dip in the torque curve both stock and tuned and after a discussion with the customer who had only recently purchased the car, we advised him to change the spark plugs. We recommend spark plugs to be changed every 20-30k miles on BMWs and with this particular car running 60k miles, it was likely they hadn't been changed recently.
A few days later, the customer experienced a misfire. We advised again for him to change the spark plugs. After changing the spark plugs, the car no longer misfired and we carried out some data logging the following week to give the customer peace of mind.
Since changing the plugs as per our recommendation, the customer has reported that the vehicle runs beautifully with all of that extra power.
We often see customers claim that their vehicle has 'full-service history' when the car has just had regular oil changes. When tuning vehicles, especially high-performance cars, ensure all serviceable items have been changed appropriately to avoid mishaps and maximise your gains.
