bmc panel filter

[mattyp]

Has anyone fitted one of these to a pre facelift 3.0d x5? If so what was the outcome? did mpg go down? any notice in performance?

[toonarmy]

I've fitted a pipercross in my 2003 but put tuning box on at same time I can get 34-35 on a steady run 26-28 round the doors

[toonarmy]

Also this should be in e53??????

[pvr]

[quote="toonarmy"]
Also this should be in e53??????
[/quote]

Moved now.

To the OP - I had one in my M, gave a bit more noise and I would guestimate about 1 - 2 mpg more.

[mattyp]

[quote="toonarmy"]
I've fitted a pipercross in my 2003 but put tuning box on at same time I can get 34-35 on a steady run 26-28 round the doors
[/quote]
I've fitted one when I serviced it and I am only getting 25mpg on a run

[Horizon]

In my opinion, which may not be correct, airflow into the engine via an aftermarket air filter won't greatly enhance your MPG or BHP.
Do you not think the highly paid boffins at BMW wouldn't  have thought of that first, instead of some small aftermarket air filter company.
The stock air filter has a massive surface area, it's called a HEPA filter . ( high efficiency Particle Arrester.)
Diesel engines run at fairly low RPM so don't require massive amounts of air volume compared to a high RPM engine.
Also the engine management system is governed by  mapping, it monitors the incoming air flow via the MAF sensors and governs the fuel mixture accordingly.
Alter the map instead of trying old school fixes that worked with carburettor'd cars of old.
Then again I might be talking Bo****ks

[toonarmy]

I put a tuning box on as well mate not just the filter but I may be wrong my focus st170 mpg improved with a k and n and my Range Rover p38 improved with a pipercross so who knows ???? :xmasgrin:

[mattyp]

[quote="Horizon"]
In my opinion, which may not be correct, airflow into the engine via an aftermarket air filter won't greatly enhance your MPG or BHP.
Do you not think the highly paid boffins at BMW wouldn't  have thought of that first, instead of some small aftermarket air filter company.
The stock air filter has a massive surface area, it's called a HEPA filter . ( high efficiency Particle Arrester.)
Diesel engines run at fairly low RPM so don't require massive amounts of air volume compared to a high RPM engine.
Also the engine management system is governed by  mapping, it monitors the incoming air flow via the MAF sensors and governs the fuel mixture accordingly.
Alter the map instead of trying old school fixes that worked with carburettor'd cars of old.

Thanks for your reply, I got given the air filter free when I bought some other parts for it, I just wondered if anyone else had fitted one and there results.
Then again I might be talking Bo****ks
[/quote]