[Diy_efi] tiny injection

[The Punisher]

I dont know what Santi is wanting to do with a small injected engine, But I 
have been looking at injecting a bank of 31cc ryobi weedwacker engines for 
My Super Heavyweight Battlebot(under construction). They dont have quite the 
power to weight ratio of the OS engine
but they are real inexpensive and easy to get at a moments notice.
The "injection" system used on the OS engine may be the only practical way 
for me to go on My setup. The rules prohibit electric fuel pumps and several 
other things which make it hard to do a normal fuel injection system. A 
"modulated" carb may be the way to go.

Marvin Fugate

From: Perry Harrington <pedward at apsoft.com>
>Reply-To: diy_efi at diy-efi.org
>To: diy_efi at diy-efi.org
>Subject: Re: [Diy_efi] tiny injection
>Date: Thu, 20 Jun 2002 09:59:26 -0700
>
>To give you an idea how big it is, the thing is like a weed wacker engine, 
>23cc.
>The engine weighs almost 2 pounds and makes 3.5hp.
>
>--Perry
>
>On Wed, Jun 19, 2002 at 10:12:13PM +0000, The Punisher wrote:
> > Thanks Eric.
> > I've been hearing about this "fuel injected" OS engine, now I took a 
>look.
> > Judging by the picture it looks like the "injector" is a duty cycle 
>solenoid
> > valve type thing, replacing the jet in the carb. Also the picture says 
>that
> > it has 2 sensors, RPM and Temp, but it looks like it also reads TPS 
>through
> > the throttle servo connection. This would make it a basic Alpha-N setup 
>like
> > an analog Holley Pro-Jection.
> > Does anybody know if this is so? If it works the way I am assuming it 
>does,
> > somebody could make something like it with a PIC or AVR fairly cheap.
> >
> >
> > >From: "Eric Aos" <eoa at spartek.com>
> > >Reply-To: diy_efi at diy-efi.org
> > >To: <diy_efi at diy-efi.org>
> > >Subject: Re: [Diy_efi] tiny injection
> > >Date: Mon, 17 Jun 2002 17:18:30 -0700
> > >
> > >OS makes an EFI engine for RC Airplanes.
> > >http://www.osengines.com/engines/osmg0680.html
> > >
> > >Eric
> > >
> > >----- Original Message -----
> > >From: "The Punisher" <punisher454 at hotmail.com>
> > >To: <diy_efi at diy-efi.org>
> > >Sent: Friday, June 14, 2002 12:24 AM
> > >Subject: Re: [Diy_efi] tiny injection
> > >
> > >
> > > > I was just discussing sometihng very similar(ryobi weed wacker 
>engine)
> > >on
> > > > the Battlebots forum, and so far have come up with nothing on "realy
> > >small"
> > > > fuel injectors.
> > > > Now I'm thinking about getting away from "conventional" efi style
> > >injectors
> > > > and look for something more like an overgrown inkjet injector or
> > >"airless
> > > > paint gun" style injector. I havent gotten anywhere yet, but I just
> > >started
> > > > thinking about it recently.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > >From: "Santi Udomkesmalee" <scathontiphat at hotmail.com>
> > > > >Reply-To: diy_efi at diy-efi.org
> > > > >To: diy_efi at diy-efi.org
> > > > >Subject: [Diy_efi] tiny injection
> > > > >Date: Thu, 13 Jun 2002 17:44:50 +0000
> > > > >
> > > > >just wondering ... Have any of you seen or heard about anybody fuel
> > > > >injecting a nitro engine for a RC car?
> > > > >
> > > > >-santi
> > > > >
> > > > >
> > > > >
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>--
>Perry Harrington			Data Acquisition & Instrumentation, Inc
>perry at dainst dot com					 http://www.dainst.com/
>
>Those who would give up essential liberty to purchase a little temporary 
>safety
>deserve neither liberty or safety. Nor, are they likely to end up with 
>either.
>                              -- Benjamin Franklin
>
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