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PostPosted: Fri Jun 12, 2009 5:26 pm 
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Clubman

Joined: Sat May 17, 2008 2:27 am
Posts: 64
Location: Sweden
Car Model: None
hi !
I know it´s the wrong club :oops: , but I saw that somebody here (in the "how to do list") have made a "FCD" to mr2. Just wondering if somebody know how to build one for the supra -89 .
/Dennis


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PostPosted: Wed Jun 17, 2009 10:17 pm 
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Club Staff
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Joined: Thu Jul 14, 2005 12:44 pm
Posts: 4067
Location: drinking devil fuel
Car Model: ST205
It's most simply done using a zener diode which will clamp the boost signal at a set limit making the ECU think that the boost never rises above a set value

I have no idea on the ECU but for sre this is not a good idea on the ST205 as the ECU this signal for fualing and ignition timing. It works on the older AFM based 1x5 ECUs though and I'd guess the 7M is probably AFM driven

One thing to bear in mind, the old 2.5 7M lump eats headgaskets for fun when running stock boost. I'd seek advice on a specific owner's club site before attempting to raise boost!


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