Just got an intake kit and in order to install the pipe I have to remove the mass air flow sensor. Before I remove it will the car run if I take it out? And if it won't how can I bypass this?

 

search.. asked mannny times. no you cant unless you go stand alone.

 

umm... what intake kit did you buy? i dont know of one that replaces the AFM or one that even comes with a pipe. you cant replace it unless you change you computer to a full standalone. and for an intake all you need if you have a s4 is a adaptor for the AFM and a filter + maybe a cold air box. and for a s5 you dont need adapter just attach the cone filter the the AFM.

 

you need a standalone to remove the AFM.

 

yup buy a haltech, microtech, wolf, motec, electromotive... etc..

 

Screw it I'll just put the cone filter on the AFM. I'll just find somewhere else the pipe might be useful. I already attached the cone to the AFM and it sounds pretty mean. Damn S5's and their electronics!

 

Just about every car with FI in that year came with an AFM. Not just the FC.

 

sorry, the post didnt show up when i posted, it was blank. soo, yah, what they said

 

how exactly does the afm work? there are some great engineering minds on here. im sure theres gotta be a way to rig up something to take it out other then a standalone.

 

How would you? The ECU needs that signal to run the car. I am unaware of any hotwire system that can provide the signal the ECU needs.

 

I'd imagine it moniters airflow and adjusts the fuel mixture according to how much air is coming in. I'd also assume that if it doesn't recieve a signal from this device it can't properly adjust the fuel so how would a standalone compensate for this?

 

well how do standalones work without it? ill have to read my manual but theres got to be a way to rig up some sort of piggy back.

 

The standalones use a MAP sensor that you install. And there is a piggy back system for the AFM. Its called the SAFC. But it only modifies the original signal, like all piggybacks do.

 

The AFM has an internal flap that is pre loaded against a spring. As air is drawn through the flap, it opens a certain amount. Depending on how much the flap is opened, a voltage will be sent to the ecu. The ecu uses this voltage to determine how much fuel to inject(at least on the s4) based on pre-written values.

The HKS VPC was used on the stock ecu, and enabled the deletion of the afm. It simply used a MAP sensor, and mocked the voltage the afm would be sending to the ecu had it been there based on airflow. Unfortunately, this was only available for the s5 turbo II's, and it's both rare and expensive.

 

Hmm thats interesting. Would I get more air without the afm?

 

The AFM is not as much of a restriction as you would think, but it does hinder airflow a bit. The main performance advantage gained by a standalone EMS is due to more modern electronics and performance tuning vs. the stock tuning that was intended for basic street driving.

 

Has anyone ever integrated a computer using destop components (i.e. Athlon64 or Pentium4) and been able to program it to run your car? I've often toyed with this thought because it would be inexpensive and interesting.

 

There have been a number of threads on this subject in various forums, possibly including this one. The short answer is NO. PC's do not contain enough real-time controls between the CPU, memory, the bus, and the peripheral bus to allow sub-millisecond (literally tens of microseconds) response times for the injectors even with their super fast processors, and you'd need to create a special hardware interface to read the signals from the sensors. By that time you might as well have an embedded system to do the work for you anyway, and thus, you've already lost the point of doing it with a PC. It would thusly not be inexpensive, or very interesting, as you'd run into a nightmare of real-time programming which even the hardest-core RT linux users have stated is virtually impossible in their own forums.

... HOWEVER ...

...almost all aftermarket standalone EMS units are fully programmable by a PC (usually a laptop connected to the ECU tuning it in either realtime - the better systems - or through maps loaded when the car is shut off for the lesser ones). Further, if you are really into DIY, check out the megasquirt project. I know of at least one rotary engined vehicle running the megasquirt, and its a true DIY embedded system ECU which has a LOT of very cool features but is very difficult to program and control properly. I'd recommend if you use it on a rotary, that you do so on an NA initially until you become knowledgable about the system and how to tune it for a rotary properly. Google up the megasquirt and check it out. You might have a heck of a lot of fun with it (and waste a few years of your life figuring it out in the first place!).

 

If you want inexpensive build a megasquirt.

And then you may ask "Whats a Megasquirt?"

To which I reply "Search young grasshopper."

 

I know this post is pretty old, but I remember from my DSM days that HKS made a vein pressure converter which you could remove the air meter. There were ofcourse problems with that, but none the less, a way to get rid of it

 

See my previous post. The VPC is a great item, unfortunately they were only made for the s5 turbo II's, while being expensive and rather rare.