AirMassMeter

[CalTe]

Hi all - what happens if I move the amm to after the Turbo.

Should it work ?

 

[CalTe]

Will there be a problem with the pressure or mybe the temperature ?

Any one ?

 

[Joe]

Hi,

as far as I know, nobody has tried this before with a C20LET. Theoretically it should have several advantages, but . . . is the AMM stable enough and so on. There was a discussion concerning this topic just a few days ago.
It ended with a call for a volunteer !

 

[rds]

would be interesting but im not cutting my wiring loom and chopping my turbo pipe either. I think post intercooler would be a good idea as well :wink:

 

[CalTe]

Post intercooler - mybe Im stupid but, what have that to do with the amm ?

 

[rds]

Post intercooler means after the intercooler so the air temperature would be much lower. The heat that comes out of the turbo could potentially melt the AMM :roll: :lol:

 

[Joe]

Naturally behind the intercooler !!!

No chance for the AMM directly after the turbo. Peaks above 160 Celsius are an AMM killer !

 

[CalTe]

Yes of course after the IC. Before there is no space and the air is too hot.

Is the platina wire the most critical part because of the pressure variations.

 

[rds]

I would love to have a go at this but don't have the guts to cut the wiring loom! would make a good project though TBH.

 

[yoyo28]

up
nobody has tried ?

 

[Joe]

Yes, someone has tried it and he was very satisfied ! (Dare Devil)
But others who also tried to put their AMM as near as possible to the butterfly valve, reported problems with leaking AMM's, as the AMM was never intended to be used under these pressurized conditions.

 

[David Dixon]

Am I right in thinking that this is not possible on the phase 3.5 because the IC return pipes would be to big for 16 psi? wouldn't this cause turbo lag?
What size is the AMM (Radius)?

 

[Joe]

Well. the diameter is a little bit bigger than most of the pipes useally found in a C20LET, but better this AMM after the turbo than in front of it.

I really can imagine that there would be several interesting advantages, if the AMM would be installed after the turbo:

1. The air drag in front of the turbo is less (Very important !) Better more air drag after the turbo than in front of it. Sucking in air through a pipe is more difficult than blowing it through the same pipe. Never forget that we are talking about a lot of air (150 liter /sec)

2. The Motronic will get a more precisly measurement of the amount of air entering the engine.

3. A BOV installed before the AMM will have minor side effects when open on the amount of injected fuel. Better for the turbo,the exhaust pipe and the catalyser.