CAI tuning and Octane

[CSKoz]

I have been searching around for info on CAIs and tuning. Just a quick question. I have seen some mentions of tuning to 93 octane. Is that a recomendation? Or can I still run 87? I like to be able to run the 87 for daily driving and then maybe put in some 93 for special occasions. Is that not a good idea? Thanks.

 

[jared88]

You can put a tune for 87 and a tune for 93 octane. You will have to select the 93 (race) tune each time you go to the track or want the extra power. Make sure you get rid of most of the 87 before you do and fill up with 93.

 

[matt07gt]

I've got my xcal tunes for 87,91, and 93....... just bite the bullet and spend the extra 25 cents per gallon. It's well worth the difference. The car runs harder with the higher octane. You could run the 87 tune and switch the the 93 tune....but you would need to make sure there isn't much of the lower grade gas in the tank or it will ping on ya.

 

[Kylejb2663]

+1!!! Just run 93

 

[modularmustang]

gas grades work linearly too. so if you have 2 gallon of 87 in your tank and fill 13 gallons of 93, you will really have 92.2. if you try to fine tune your setup or add more timing make sure you wait to fill it with 93 twice to get most of the 87 out.

 

[CSKoz]

Good advice, thanks everyone. Just wanted to make sure I had things clear in my mind.

 

[breatle62]

I've got my xcal tunes for 87,91, and 93....... just bite the bullet and spend the extra 25 cents per gallon. It's well worth the difference. The car runs harder with the higher octane. You could run the 87 tune and switch the the 93 tune....but you would need to make sure there isn't much of the lower grade gas in the tank or it will ping on ya.

I agree the price diff, isnt enough for me too keep going back/forth...lets face it 93 is more refined than 87 octane....which is better for a hipo engine..

 

[CSKoz]

Yeah, if I do it I will go 93. I was thinking of just tuning to 89, but kind of dumb to go through all the trouble.