AFM after intercooler ??st185

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AFM after intercooler ??st185

Postby partsmax » Thu Feb 28, 2013 5:00 am

i am interesting of relocated my afm after the intercooler in my st185 ; i saw afm in intercooler pipe in some mazda and run fine
has anyone tried this?
and what are the benefit and problems in this setup?


sorry for my english im from latin america panama
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Re: AFM after intercooler ??st185

Postby UtahSleeper » Thu Feb 28, 2013 5:35 am

I think there are too main issues. One, our AFM SUCKS!!! Two, the size of it makes locations limited, plus you would have to extend the wiring. Why do you want to do this?
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Re: AFM after intercooler ??st185

Postby 4rsnduction » Thu Feb 28, 2013 7:41 am

The AFM body is also home to the IAT sensor and that thing likes to see fresh cool air not hot compressed air.
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Re: AFM after intercooler ??st185

Postby brutekiller787 » Thu Feb 28, 2013 3:30 pm

And you didnt read because he said post intercooler. I think rather than anything, it would not be designed to be leak proof from front to back. It is not design for pressure to go through it.
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Re: AFM after intercooler ??st185

Postby yoshimitsuspeed » Sat Mar 23, 2013 11:05 pm

Your AFM measures volume of air. After the turbo volume is reduced as pressure is increased. Put your AFM anywhere after the turbo and it will measure much less air passing through it causing the car to run very lean. If the car was designed to run that way it would work. If someone had aftermarket engine management or was able to tweak the system while monitoring things like AFRs it has been made to work but there is really no good reason to try. Without the right tools to monitor everything it would just be very dangerous.
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Re: AFM after intercooler ??st185

Postby underscore » Sat Mar 23, 2013 11:52 pm

It could probably be made to work, but I'm not sure why anyone would do that.
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Re: AFM after intercooler ??st185

Postby RedCelicaTRD » Sun Mar 24, 2013 3:36 am

It's been done before. Don't remember it working much better then the stock setup.
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Re: AFM after intercooler ??st185

Postby Meurz » Sun Mar 24, 2013 11:42 am

HKS pushed 400 ps through it back in the day. Quick phone pic from Hyper Rev 30:

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Re: AFM after intercooler ??st185

Postby Mafix » Tue Mar 26, 2013 6:44 pm

it is far more common on mercs and porsche back in the day. the issue is the mapping in the stock ecu will be very very wrong. so you'd need an interceptor or standalone. at that point you shouldn't need the afm.
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Re: AFM after intercooler ??st185

Postby zero06 » Sat Apr 27, 2013 7:51 pm

you would not want to do this. you would have massive pressure drop and a big loss of power.
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Re: AFM after intercooler ??st185

Postby 4rsnduction » Sat Apr 27, 2013 11:28 pm

Meurz wrote:HKS pushed 400 ps through it back in the day.


HKS also had an additional unit similar to a powerFC that could help improve what the ECU saw as far as signals go
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