timing advance help continued

[302fordracer]

someone on here said that after advancing the timing on the 94-95 gt that you would have to use higher octane gas.....is this really true because my buddy who was a mechanic for years says no....what is you guys' experience? If higher octane is required will 89 or 92 suffice, if so which is prefferred?

 

[1hot5.0]

Yes you will have to run higher octane whenever you advance your ignition timing. Failure to do so will result in pinging.

 

[nmcgrawj]

i guess you could just advance it with 89 in your tank (if you even can) until it starts to ping. You dont HAVE to run a higher octane of fuel but a higher octane allows you to further advance the timing.

I run 93/94 whatever i can get my hands on and my timing is at 16* with no pinging