I'm trying to find out the maximum g/sec reading the MAF on my AJL engine can read. Its part number is 037906461C, and is typically found on 1998-2000 1.8T's with ME3.8 management, such as the AGU and AEB engines.

Does anyone happen to know this value, or perhaps have a dump from an AGU or AEB ECU that they can have a look at to see the maximum value on the MAF table?

Cheers

So what exactly happens when you go off the scale?

Surely the voltage from the sensor just flatlines at 5v and doesnt go any higher?

If so how can you fuel for air you cant see?

Well ofcourse, but the chap above says hes had 311hp out of a stock AGU MAF, and i cant figure out how you can fuel for 311hp if you only know the engines making 187g/sec

AFAIK the M3.8 goes open loop on full throttle, so i doubt it would be lambda correction?

It was my understanding that the MAF reading was is directly proportional to the fuel injected. On a friends car we installed a VR6 MAF (which is ~40% larger than stock), and some 40% larger injectors, and the fuelling seemed spot on, LTFTs stayed low and the engine ran quite happily. Ignition timing was away to hell and the car pulled massive CF's though, presumably because the ECU was seeing lower airflows than was actually happening and it was using too much ignition advance as a result.

It just intrigues me as to how you can fuel for 300hp when the ECU thinks theres only 230ish hp's worth of air going in!



The reason for the question is i've fitted a hybrid turbo to my daily, and i believe its capable of flowing 240-250hp worth of air. I dont intend on upgrading MAF/Injectors etc as i dont want to turn the car into a big project, i just want to give it a bit of a boost from its current 180hp and would like to know how much can be had from this turbo on the standard components.

The 187g/sec limit suggests that i'll be able to have about 230hp without reaching the MAF limit, which is probably going to be enough. I guess the bigger issue with be if the standard intercooler and exhaust system is capable of handling those levels of power.

Hi Guys ,

Any news on this ?

I have the AGU with ko4-23 and ~ 406 CC injectors. I noticed that the MAF in my bin has not been scaled , not has the Lineraization for maf been scaled . I have the VR6 housing with normal AGU sensor .

Max airflow is 130 g/s and load is 9ms , I assume this is due to scaling ?

i am new to this , just getting started in an effor to fine tune the car properly .