Which ignition coil for race engine?
Posted: Wed Mar 30, 2022 10:43 am
Which ignition coil do you racers use with the raceengins (rpm around 8000)?
TTR supplied me a 1 Ohm ignition coil without any branding for my car with conversed electronic ignition distributor.
https://www.tonythompsonracing.co.uk/parts/models/elan-s1/electronic-ignition-2007-ttr-spec-for-competition-all-steel-engines-over-150bhp/
I guess there should be a resistor wired between for it?
Or use a 3 Ohm ignition coil like I do on my road Elan S4?
Pertronix with the Flamethrower has a table sheet which says 4 cyl engines below 6000 rpm should use their 3 Ohm Flamethrower coil but for high rev 4cyl engines above 6000 rpm a 1.5 Ohm coil should be used ...
According to FIA I must use a 3 Ohm ignition coil but I´m afraid it won´t work well if the coil has no time to recharge at higher rpm? If I understand the FIA then systems like a MSD is not allowed, too.
FIA rules for Period F:
What are your experiences with ignition systems and how is it done on your racecars?
I would like to plan and fabricate my wiring harness for the car soon and before that I want to know what I will use for the ignition system.
TTR supplied me a 1 Ohm ignition coil without any branding for my car with conversed electronic ignition distributor.
https://www.tonythompsonracing.co.uk/parts/models/elan-s1/electronic-ignition-2007-ttr-spec-for-competition-all-steel-engines-over-150bhp/
I guess there should be a resistor wired between for it?
Or use a 3 Ohm ignition coil like I do on my road Elan S4?
Pertronix with the Flamethrower has a table sheet which says 4 cyl engines below 6000 rpm should use their 3 Ohm Flamethrower coil but for high rev 4cyl engines above 6000 rpm a 1.5 Ohm coil should be used ...
According to FIA I must use a 3 Ohm ignition coil but I´m afraid it won´t work well if the coil has no time to recharge at higher rpm? If I understand the FIA then systems like a MSD is not allowed, too.
FIA rules for Period F:
6.5.1
Cars of Period F with evidence of period use of electronic ignition may use a non-period electronic ignition system provided this system is triggered by contact breaker(s), utilises an ignition coil with a minimum resistance of 3 ohms, the spark is distributed by a rotor arm and the timing of the spark is controlled entirely by mechanical means.
Multi spark systems and systems where the timing of the spark is altered electronically are not permitted.Exceptionally, where evidence exists that alternative methods of triggering were legally used in period, this may be utilised provided the method is identical in every respect to the period method.
What are your experiences with ignition systems and how is it done on your racecars?
I would like to plan and fabricate my wiring harness for the car soon and before that I want to know what I will use for the ignition system.