Date sent: Tue, 27 Jun 1995 19:11:29 -0400 (EDT)
From: John Van Valkenburgh <jvan@nando.net>
To: MG mailing list <mgs@autox.team.net>
Subject: Re: Fool Injection
Send reply to: John Van Valkenburgh <jvan@nando.net>
>From: Jay Tilton <jtilton@vt.edu>
>Subject: Fuel injected B
>I just got the June issue of British Car. Is anybody else out there
>feeling a bit giddy over next issue's tech article on throwing a fool
>injection system on a B? >:) (fiendish grin)
>>Hmmm. Actually I had thought of putting fuel injection on my '70B.
>>I thought about using part of the SU carb throttle body to regulate air
>>flow, and using some off the shelf injectors. Sort of a throttle body
>>injection system. I don't think I'd use an air-flow sensor. I think I
>>could use a throttle position sensor and then calculate air flow based on
>>RPM. I think I'd have to have some sort of vacuum transducer to help
>>determine the engine load.
>>It would also be interesting to regulate the ignition advance based on
>>engine demands, but that could be a seperate system in itself.
>>I would need to put an oxygen sensor in the exhaust manifold to determine
>>if I need to make minor adjustments to the mixture. I could by trial and
>>error, create a "table" or formulia for the initial mixture settings,
>>and store them in an EPROM. This table could then be read into an
>>EEPROM and be tweeked by the microcontroller over time.
>>I'd use something like a Motorola 68HC11 microcontroller, or even perhaps
>>one of the fast DSP based micros that TI makes.
>>Unfortunately it will likely be one of those things I always wanted to do
>>but never got around to.
Sorry, John , but HALTECH Engine Management systems has evidently
been monitoring your day dreams. They've already done this, except
they base it on a Weber carb body.
Regards,
Jerry
Jerry Causey
antiques@whidbey.com
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