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Author Topic: Ignition system with vintage engines  (Read 9402 times)

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Offline tortoise

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Re: Ignition system with vintage engines
« Reply #15 on: June 08, 2014, 03:27:10 PM »
Quote from: panic on June 08, 2014, 12:26:34 PM
your ignition system cannot REACT to any input from your engine

English is a foreign language here, yes?
Isn't engine RPM an input from your engine?
Isn't centrifugal advance control a reaction to engine RPM?
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Offline 38flattie

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Re: Ignition system with vintage engines
« Reply #16 on: June 08, 2014, 03:29:10 PM »
The electromotive unit would not be legal for vintage, if you are using timing control, as I understand the vintage rules.

Of course, reading the rules, then seeing what is being run, not much makes sense about vintage ignition systems!
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline xxobuick

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Re: Ignition system with vintage engines
« Reply #17 on: June 08, 2014, 05:36:00 PM »
The new rule now defines what a "computer" is.  This has not been in the rule book until now.  So, since it takes a 60 tooth wheel and computes that into firing every 90 degrees, it is not legal.  I have heard that they have been allowing it up until this year because the definition has never been in the book.  SO all those guys that set records with awesome ignition systems, no everyone from here on out, has to use a lesser ignition system to break their record.  So it makes it much tougher now.  Mainly for the blown guys rather than the NA guys, since they benefit more from a hotter spark with increased cylinder pressure.
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Offline 38flattie

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Re: Ignition system with vintage engines
« Reply #18 on: June 08, 2014, 06:04:42 PM »
Lesser ignition system? It's vintage! Everything is 'lesser' compared to other classes.

We lock our MSD 20 mag down, and run

We add engine management to switch to modified class
« Last Edit: June 08, 2014, 06:24:43 PM by 38flattie »
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With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline xxobuick

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Re: Ignition system with vintage engines
« Reply #19 on: June 08, 2014, 06:58:44 PM »
Yes Lesser.  If someone in the past was allowed to run a Electromotive in Vintage, but now since there is a definition of a computer, this is not allowed.  So someone that set a record with one before was perfectly ok, but now since rules are tighter and don't allow it, we cant run the same system that last year was allowed.   Us NA guys don't like to run a mag, as they take our needed HP :)
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Offline bearingburner

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Re: Ignition system with vintage engines
« Reply #20 on: June 12, 2014, 06:13:12 PM »
The rules say that vintage engine modifications are limited to older technology levels. How old are older technology levels?
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