kPa under boost

Glen Beard gbeard1 at nycap.rr.com
Sun Nov 14 21:12:01 GMT 1999


"David A. Cooley" wrote:
> 
> At 05:06 AM 11/13/99 -0500, you wrote:
> >After reading the Programming 101 a couple times while trying to
> >relate it to my car, I noticed in the fuel/spark tables that kPa
> >maxed out at 100 (which corresponds to 14.5psia)  What would
> >happen under boost from a supercharger?  What would the PCM use
> >in it's fuel/spark tables if kPa were around 18.0psia?
> 
> That's why you go to a 2 bar or 3 bar map and redo the fuel tables...

If I need a 2 or 3 bar MAP for it to work, how am I getting by
with the stock 1 bar MAP?  Is it because the FMU kind of uses the
brute force method to alter fuel delivery?

Also, I haven't heard of others going to a 2 or 3 bar map when
they have their computer reprogrammed with larger injectors to
get rid of the FMU.

Do the kPa in the fuel/spark tables go above 100?

-- 
Glen Beard  95 T/A conv M6
355, Vortech, heads, cam...
http://home.nycap.rr.com/gbeard1/TransAm.html



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