<VV> EFI Info Re: OBD-II for Corvair

Mon Oct 11 13:55:55 EDT 2010

Thanks Frank, its actually Charlie who is the receiver here. I've already am
about half way through my EFI project. And, I've already been on the DIY EFI
site quite a bit. Rather than building my own board, I bought a rebuilt
1223370 GM 90-92 Camaro stick ECM and chip for $50. I just finished my
wiring harnesses for the ecm (3 of them) and have acquired most of the
parts. I'm modifying the carbs to straight throttle bodies boring out the
venturi and ecpanding the bore to 1.33", will make a new set of throttle
plates for it. Have all the sensors, etc. Just waiting for bad weather to
bring the car inside (I still want to drive it on sunny days) and the
conversion will begin!
Mark Durham

On Mon, Oct 11, 2010 at 10:16 AM, <FrankCB at aol.com> wrote:

>  Mark,
>
> A good idea to get started with this is to go to   www.diyautotune.com
> and click on the "Tech Articles" button to access a number of detailed (with
> pics) articles.  The first is a conversion of a carbureted Chevy V-8 to
> throttle body EFI.  Others cover multiport EFI. Whether you use the
> MegaSquirt or go to an EFI from a production car, these articles will give
> you a lot of insight into what's needed and how to go about it,
> step-by-step.
>
> Incidentally, you can build your MegaSquirt from a kit of parts OR buy one
> already assembled.  If you build it yourself, I recommend getting a
> Illuminated magnifying glass light as well as a temp. controlled soldering
> iron with a VERY small tip.  If you don't have experience soldering micro
> circuit boards, I suggest buying the already assembled unit.
>
> Frank Burkhard
>
>  In a message dated 10/10/2010 11:01:07 A.M. Eastern Daylight Time,
> 62vair at gmail.com writes:
>
> Charlie: I don't know what " Arduino" DIY circuit boards, are, but there is
> a Mega Squirt group you should check out. I think it was a bunch of college
> kids who designed the system, but there are a half a dozen places around
> the
> country that sell mega-squirt ecm kits you can solder together that is
> totally programmable.
>
> If you are in to the DIY stuff, that might be a great way to go, however,
> if
> you follow Ken Brown's blog and my "Lower Cost EFI for Corvairs on Corvair
> Forum, you will see that there are already programmed and easily programmed
> ECM's off GM cars you can get for a fraction of the price, along with all
> the sensors at ytour local pick and pull, , and add that to the Corvair. I
> bought my rebuilt ECM for $35. I found a guy who can do the chip
> programming
> for either $55 or $85, depending on what needs to be done. There is lots of
> info on other Chevy forums on the EFI, and certain popular GM ecm's, that
> lend themselves to doing the mods.
>
> Craig Nicol converted his 140 to a Fiero V-6 system and did no
> re-programming.
>
> My EFI/DIS project is in gear. I've got all the parts, plan to drive the
> car
> one more time this fall, then its in the shop for the conversion.
>
> regards  Mark Durham
>
> On Sat, Oct 9, 2010 at 10:30 PM, Charles Lee <Chaz at properproper.com>
> wrote:
>
> > Thanks for the excellent ideas - I would never have thought of a generic
> > catalytic converter.
> >
> > The EFI/DIS lend themselves nicely to other (digital) electronic
> auxiliary
> > solutions, such as Ken Campbell externally setting the high speed mixture
> > at
> > speed, or the "Innovate" system to digitally control (or at least
> monitor)
> > air flow dynamically, among other "engine-ious" solutions.
> >
> > I have a great book on fuel injection by Bosch to go along with Bob
> Helt's
> > carb book both full of fun facts that lead to thinking about improving
> the
> > Corvair's air-quality-quotient, plus make them eminently more reliable in
> > the process.
> >
> > Maybe electronic controls like Mike Mauro's air flow meters are just what
> > are needed to continually monitor the wide range of operating conditions
> > that drive the Corvair ?
> >
> > Has anyone used Arduino DIY circuit boards to design your own controls ?
> > They are completely programmable and may provide an interesting solution
> ?
> >
> > I'm still trying to NOT asphyxiate myself while getting mine to run well
> > enough to drive, and figure now's the time to investigate my options ?
> >
> > Thanks for the insights !
> > Charlie
> >
> > ----- Original Message -----
> > From: "Dale Dewald" <dkdewald at pasty.net>
> > To: <virtualvairs at corvair.org>
> > Sent: Saturday, October 09, 2010 9:17 PM
> > Subject: Re: <VV> OBD-II for Corvair to make Corvairs less "aromatic" ?
> >
> >
> > > At 17:09 10/09/2010 -0400, Charlie wrote:
> > >
> > >>I have heard on VV that Corvairs (and other air-cooled engines) are not
> > >>good
> > >>candidates for meeting air quality requirements due to the high
> > >>temperatures, (and poor construction tolerances ?)
> > >
> > > It is not so much the operating temperature, but the wide range of
> > > operating temperatures that occur between idle, coast, cruise,
> > > acceleration, etc for an engine that is, for all practical purposes,
> > > "warmed up."  This necessitates rather loose tolerances--by design--to
> > > account for thermal expansion of the various parts.
> > >
> > >>It seems like you have done a lot of research and we might all benefit
> > >>from
> > >>this to make Corvairs less "aromatic" ?
> > >>
> > >>I can smell "classic" cars when they drive by me, and know that my
> > Corvair
> > >>(also a 1967 Monza 110 PG) also does, and would like to remedy that.
> > >
> > > Beyond making adjustments to the carburetor jetting, you might consider
> > > installing a universal fit catalytic converter in the exhaust system.
> > >
> > > Dale Dewald
> > > Hancock, MI
> > >
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