3 inch maf

[mike 850]

Can anyone give me some info, what maf housing can i use, will it cause any issues going to a 3 inch maf?

Cheers

[merc85]

Vauxhal 3.0 omega i think peeps use

[claymore]

You can use a Vauxhall Omega 2.5 housing, but yes it will cause you a whole load of grief unless you get it custom mapped, why do you want a bigger maf housing?

[mike 850]

fitting 3inch intercooler piping and wanted the intake to match, looks pretty

[oblark]

You can use a Vauxhall Omega 2.5 housing, but yes it will cause you a whole load of grief unless you get it custom mapped, why do you want a bigger maf housing?

What he said

The bmw 540i maf is 3.25"

[claymore]

fitting 3inch intercooler piping and wanted the intake to match, looks pretty

Sorry, it's not that simple, you only fit a bigger maf housing when the standard one reaches the limit of the information it can send to the ecu, the reason for a bigger maf housing is for slower air flow past the sensor.

[mike 850]

ah fair play, is there some sort of power figure before its needed?

[claymore]

Into the high 300 low 400 bhp area

[oblark]

As you can see the 850 maxes out @ 800ish kg/hr and the 540 maxes out @ 1100ish kg/hr

So when you are on WOT upto 300 kg/hr more air will be passing the maf sensor which the ecu will not account for.

This will cause the engine to run lean and melt something.

[mike 850]

wow, really helpful, thanks for that, so is it the fueling that will be the issue then? i dont have to worry about that power figure yet then...

[T5frankie]

as said, i got an omega 3.0 one

[p fandango]

i made one, think it cost £20 to have it welded together

[mike 850]

are yours all custom mapped for it then?

[p fandango]

are yours all custom mapped for it then?

mine's not even mapped, but hadn't got the AFR gauge on then so not sure what the fuel was doing

[T5frankie]

are yours all custom mapped for it then?

mapped? his car aint moved for years

[p fandango]

mapped? his car aint moved for years

how fasts yours at the minute?

[claymore]

Frankie, didn't you car go pop because of the maf housing, or am I just remembering something else?

[claymore]

are yours all custom mapped for it then?

yes, I map my car myself

[mike 850]

Turbo tuner right? I keep looking at that

[Jamest5r]

I fitted a 3" maf claymore was there and I have an afr gauge it went from 14.7 on idle to over 18 ie off the lean end of the scale be very careful if your thinking of it