modifiying standard injection

Fri Feb 1 07:53:15 GMT 2002

Adrian,

You might want to give Dean M. a call. His email is
dm19959 at aol.com. He's famed for turboing NA Supra's
with as much as 14 psi!

Mark Bottorff

--- Adrian R <ajrgsr at hotmail.com> wrote:
> thanks Bill
> 
> I will have a read of everthing I can get My eyes on
> 
> The only problem I can see (We have the gm computers
> you speak of here in 
> australia too and i have seen many applications of
> them) is that I want and 
> sort of need to retain the toyota computer, for a
> number of reasons, but 
> mainly cost. This means I will only be able to
> modify the inputs the 
> computer sees or modify the outputs AFTER the
> computer has done its work, 
> based on boost pressure etc.
> 
> Cost is a MAJOR issue for Me. Even the GM computers
> here in Australia will 
> set Me back (on average) $400 to $500 without
> software which is around $200 
> (Don't forget the exchange rate and our GST before
> you berate Me about the 
> costs). Add to that the $80 dollars an hour required
> for dyno time and it 
> all gets a bit out of hand. For about that price I
> can buy a brand name 
> piggyback computer or for $100 more, the first of
> the Microtech range of 
> ECU's and have a LOT more tuneability and
> installation flexability. 
> Therefore changing to another computer is not an
> option.
> 
> I know it makes life difficult, but retaining the
> factory computer has to be 
> the basis of this project. I already intend building
> and modifify one of the 
> projects I have seen on the list to build a data
> logging system for TPS, MAP 
> and RPM. This should give Me a good starting point.
> 
> The motor is not intended to be a super horsepower
> machine. Mild boost is 
> being considered (6-7psi), espically taking into
> account the factory 9.0:1 
> compression ratio and factory clutch, gearbox and
> driveshafts. It is more 
> intended to make the car more comfortable on the
> open road.
> 
> Has anyone ever built their own micro fueller or
> something similar, using it 
> to fire and control extra injectors dependant on
> boost ec?
> 
> thanks again
> Adrian
> ajrgsr at hotmail.com
> 
> >From: "William Shurvinton" <shurvinton at orange.net>
> >To: <ajrgsr at hotmail.com>
> >Subject: Re: modifiying standard injection
> >Date: Wed, 16 Jan 2002 23:38:33 -0000
> >
> >Hi Adrian,
> >
> >Best place to start is www.diy-efi.org Go to the
> GM_ECM pages and read
> >everything there. There are some well sorted GM
> ECMs for turbo cars that 
> >can
> >be got cheaply and programmers for them. Also the
> guys on the list are very
> >knowledgable.
> >
> >Rgds
> >
> >Bill
> >----- Original Message -----
> >From: Adrian R <ajrgsr at hotmail.com>
> >To: <DIY_EFI at lists.diy-efi.org>
> >Sent: Wednesday, January 16, 2002 2:42 AM
> >Subject: modifiying standard injection
> >
> >
> > > hello there... I'm new to the list, but it seems
> excellent
> > >
> > > I have a question and it may seem strange, but
> My finances are not what 
> >I
> > > would like and I have everything I need to
> turbocharge My 1994 Toyota
> > > Corolla Sprinter EXCEPT a computer. Aftermarket
> computers are becoming
> > > prohibitivly expensive (which is strange seeing
> as MOST aftermarket
> >systems
> > > are developed here)
> > >
> > > I understand basic electronics and computers...
> I probably understand 
> >more
> > > advanced ones too as long as I take the time to
> read it properly.
> > >
> > > I was wondering how far the inputs on a factory
> computer can be modified
> >and
> > > by what means. I have seen simple variable pots
> do amazing things to
> >factory
> > > computers but I am not sure of the processes or
> how well factory 
> >computers
> > > learn. I read an artical of a similar fit to
> what I want to do (on a
> > > different car). The writer wrote about
> "re-learning" the computer by
> > > disconnecting the O2 sensor and driving around
> (removing the computer's
> > > ability to close loop) manually adjusting fuel
> mixtures to keep them
> > > relativly correct using a simple circuit of pots
> to adjsut map sensor
> > > inputs. The artical continues to say that after
> only a few days of 
> >normal
> > > and hard driving, he was able to re-coonect the
> O2 sensor and the 
> >computer
> > > continued to run the car as if it was its normal
> prgramming.
> > >
> > > I have even considered building My own
> micro-fueller, running 1 or 2
> > > injectors idependantly. I have a few ideas on
> how to do this but am 
> >still
> > > investigating
> > >
> > > any ideas, comments or suggestions would be
> greatly appreciated. Please
> > > contact Me directly at ajrgsr at hotmail.com as I
> can not garruntee getting
> >to
> > > the lists
> > >
> > > thankyou
> > >
> > > Adrian
> > >
> > >
> > >
> > >
>
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> > > 
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