Hack thought for MAS system???

JimZ -92' AWD Tsi jzalesny at ix.netcom.com
Thu Dec 28 17:11:47 GMT 1995


I'm new and just getting into thoughts about modifying my current MAS 
system and injectors and would like information why the this will not 
work before I give it a try.

Car 92 Talon 2.0 turbocharged

I would like to enter a secondary air source down stream from the MAS 
so more air is entered into the system which will be unmetered.  As I 
see it the vaccum from the engine will pull from both air sources at 
the same rate at any given r.p.m.  To compensate for the lean 
condition(s) that would result I would install larger injectors. I 
think a larger injector would provide more fuel at a given pulse width 
thereby compensating for the extra airflow.  Now how bad would the pre 
programed fuel curves handle this setup?  I can see the ECU able to 
compensate for a idle and minor fuel difficientsies by input from the 
O2 sensor.  This hack would also eliminate the fuel cut that is 
experienced by turbo charged vehicles when the MAS detects too much air 
entering the system.  Matching the injectors to the air flow would be 
the next problem.

Thanks for any advice

JimZ



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