Calling all Ignition gurus . . .

[Bruce Plecan]

-----Original Message-----
From: brucep at ptd.net <brucep at ptd.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Monday, February 01, 1999 4:42 PM
Subject: Calling all Ignition gurus . . .

Ahhh pulling tractors
30CID Single?.
If you magnet/pickup will light a LED it'll fire the gm module.
An 8,000 rpm single, I can't off hand think of an answer for the ecm.
Bruce


>I've lurked long enough and watched all the discussion here and learned
alot
>. . . now I have some questions
>
>I am building an ignition system for a one cylinder tractor, This will be
>used on a 30 cid alcohol burning 1/4 scale pulling tractor. My plan after
>reading all there is to read about ignitions in the archive is to use a GM
>HEI coil. My system will be setup like this:
>
>Homemade nylon/plastic collar with epoxied in metal trigger(steel or iron?)
>attached to the crank, Ford distibutor coil pickup, (using the ford due to
>size) hooked to the 4 pin GM module, which in turn will be hooked to the
HEI
>coil. In theory this appears to work, will it? Anyone do it yet?
>
>Will a GM coil run a single cylinder up to 8000rpms? I saw some info saying
>above 5000 rpms the coil drops off but that would be on a multiengine car
>right, since u would have one trigger per rev not 4,6 or 8?
>
>I realize that I will have a wasted spark on the exhaust stroke.  My
advance
>will be a manual cable that will rotate the pickup coil after the engine is
>started. Might play with a vacuum advance/or electronic setup later on in
>the season if this even works (anyone wanna help out I'm electronic
stupid)?
>
>After reading all the info here I kinda think that it wouldn't be all that
>hard to put a GM (?) fuel injection system on this tractor, hardest part
>would be a chip for a single cylinder I guess? Carb rules for this class
>says must be normal aspiration so injection is legal, saw one guy running a
>hilborn at the nationals this past weekend.
>
>Cost is a big factor in this design, I need to use "junk yard parts" since
I
>do not have alot to spend, besides it sure is alot better to beat the big
>$$$ guys with "junk" Thanks in advance for any info, and if this wasn't a
>good posting for this group sorry, but it is my first post in a year :)
>
>Bruce
>
>"advanced dealer in the great material continuum"
>