1-bar to 2-bar conversion

[Bruce]

The only ecm used in 2 bar applications, was the 1227749.
At the www.syty.org site has info on that ecm.  There are some bin files for
the 749 at the bin library.
Just a matter of some one, or someone organizing a serious attempt at
actually doing it.
Folks been asking this very guestion for years now,
Bruce



From: "Toby Corkindale" <tjcorkin at sa.pracom.com.au>
Subject: 1-bar to 2-bar conversion
> Hi all,
> I'm currently running one of my cars, a Holden VN Commodore, on a modified
> and supercharged V6 engine.
> The engine's the australian version of a buick engine, 3.8 litre, and runs
> with a Delco '808 (i think thats right?) using MAP and DFI.
> It was tuned up originally to use the stock 1-bar map sensor, but
obviously
> this isn't ideal given the blower!
> I am interested into getting into reprogramming and tuning the car myself,
> and i'm fairly cluey when it comes to working stuff out, so I thought it'd
> be worth a try.
> I understand that major tunes are best done by professsionals, but i'd
like
> to be able to make tweaks and stuff myself. Anyway, I don't know if its
> practical, but I'd like to try and get a 2-bar setup for my car.
> I have the sensor, but i'll need to remap the ECM settings; i have assumed
> that i'd be able to take the existing settings, and interpolate from them
to
> a 2-bar version.. Do you think this is practical?
> Apparently the existing setup I have (which was done professionally,
> although i wasn't really satisfied with it) basically just guesses at
> whether or not its under boost based on whether the map sensor has been
> maxed out, and then dumps fuel based on rpm. (since rpm is proportional to
> boost..)
> ick. doesn't sound right to me.
> Anyway, what do you think my chances are, with a laptop, eeprom writer and
> an ALDL cable?
> Would anyone know where i could find an appropriate memcal definition
file,
> and/or an example memcal bin set up for a 2bar map sensor?
> Thanks,
> Toby

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