Whilst checking the MAF on my 115PD the other week I noticed that there are 2 screens between it and the airbox.
The first (closest to the MAF) is a very fine metal gauze, the other a quite thick plastic grid. Obviously both are designed to stop FOD from entering the turbo.
Now,
Back in the early 90's Yamaha restricted the power of their FZR 1000 EXUP sportsbikes by means of a large rubber grid between the airfilter and the carbs. This restricted airflow by 25%. All you needed was a stanley knife to restore power to what it was always designed to be.
Back to the present.....
Calculating the area within the maf inlet (60mm diameter opening) then adding up the surface area of the plastic grid (approx 1mm wide and 6mm squares) I figured that this on its own was restricting airflow by around 30% possibly more.
5 minutes carefull cutting with a stanley knife later and the plastic grid was gone.
It makes an instant difference. The engine Revs faster and doesn't feel as strangled anymore. MPG has also improved and it doesn't smoke. This is all on a standard car!
Warning!
Do not carry out this mod if when you take the lid off the airbox there is any debris on the engine side of the airfilter. Even though the metal gauze is pretty tough the plastic grid is designed to stop large objects. As I have never had anything on top of my filter I had no problems with doing this.
I don't know if this is a common mod or has been done before. Just had to share it with you guys as it makes a difference for no monetary outlay.
The first (closest to the MAF) is a very fine metal gauze, the other a quite thick plastic grid. Obviously both are designed to stop FOD from entering the turbo.
Now,
Back in the early 90's Yamaha restricted the power of their FZR 1000 EXUP sportsbikes by means of a large rubber grid between the airfilter and the carbs. This restricted airflow by 25%. All you needed was a stanley knife to restore power to what it was always designed to be.
Back to the present.....
Calculating the area within the maf inlet (60mm diameter opening) then adding up the surface area of the plastic grid (approx 1mm wide and 6mm squares) I figured that this on its own was restricting airflow by around 30% possibly more.
5 minutes carefull cutting with a stanley knife later and the plastic grid was gone.
It makes an instant difference. The engine Revs faster and doesn't feel as strangled anymore. MPG has also improved and it doesn't smoke. This is all on a standard car!
Warning!
Do not carry out this mod if when you take the lid off the airbox there is any debris on the engine side of the airfilter. Even though the metal gauze is pretty tough the plastic grid is designed to stop large objects. As I have never had anything on top of my filter I had no problems with doing this.
I don't know if this is a common mod or has been done before. Just had to share it with you guys as it makes a difference for no monetary outlay.