advanced timing and octane rating?

ASSISTANCE Stock Engine-Bay Components
1

I always heard from you guys that with advanced timing, the use of a higher octane rating was a must. Well, since the gas prices are going up and up each days, I was wondering if I could use some 87 instead of my regular 89 or 91… (used to be 91 but I switched to 89 since it’s quite expensive)

My timing is at 17 degrees… stock is 16 +/- 2… I’m assuming i’d be ok but I just wanna hear it from you! :slight_smile:

Should I stick with the 89 or go with 87?

2

I would think you’d be fine. At least until the summer. Even then you might be fine, but I wouldn’t race on it :slight_smile:

3

i was thinking of advancing the timing from 16- 18 have you guys notice a diff
:uhoh:

4

im at 17.5 or so and use 89. 87 arco just seemed like crap (no audible pinging tho) and 91 didnt seem to do better. now that you mention gas prices i might just go back to stock and 87. ah who knows