Forum » Practical Dyno Tuning » Timing offset on direct fire engine

Timing offset on direct fire engine

Practical Dyno Tuning

Discussion and questions related to the course Practical Dyno Tuning


Page 1
Author
178 Views

Why is common to adjust a 360ยบ in direct fire (coil on) ignition?

I'm not sure if I understand your question correctly? If you're talking about the base timing or timing offset then with direct fire engines we can end up with the ignition timing at the correct point on the crank pulley when using a timing light but we may be on the wrong engine cycle and hence the spark occurs on the exhaust stroke. Adjusting the timing offset by 360 deg will correct this and put the spark on the proper engine cycle.