[foo7887]

how far can you advance it with no work done to the engine itself, I've heard 14 degrees but I've also heard of some people going as high as 18....thanks

[GTRaptor]

14-16 max, might need to use higher octane fuel.

Advice is to advance as much as possible without detonation using the same octane fuel.

[foo7887]

what happens when detonation occurs

[shakerhood]

Originally Posted by foo7887

how far can you advance it with no work done to the engine itself, I've heard 14 degrees but I've also heard of some people going as high as 18....thanks

It depends on your Mustang and the Quality of the Fuel you have in your area, if you hear pinging than you went too far, try to get the most you can without any pinging and set it there.