Tuner question

[Barricade]

ok...the tune is for 91 but we dont have 91.
Its been awhile since Ive done this and I cant remember....

If I have 93 octane gas what do I set the spark advance to to compensate?

 

[eighty6gt]

I'd leave it alone.

 

[Barricade]

Why? You can take advantage of the extra octane...

Im remembering +2....

hhhmmmmmmmmmmmmm

 

[stkjock]

2* should be fine. However I would email my tuner and ask his suggestion.

 

[eighty6gt]

I'm lazy, haha, but really let me/us know if you can tell a difference. Two degrees is enough I guess.

 

[JEWC_Motorsports]

Robert what car is this for?

 

[Barricade]

Ahhh...found my answer from way back when I asked it the first go round.

lol

 

[Barricade]

Robert what car is this for?

This was on my wifes Mustang....

 

[JEWC_Motorsports]

Ahhh yeah 2* should be good.

 

[BruceH]

That's the correct answer. Ask. There are different ways to set spark advance. Your tune might already compensate for higher octane though an adder. Add more globally and it might not be good. The odds are low that your tuner set it up that way but unless you ask you won't know.

IMO it's unlikely that you will see much performance improvement. Maybe 5hp.

2* should be fine. However I would email my tuner and ask his suggestion.

 

[MADGT]

I am running 91 tune/93 octane as recommended by Brenspeed to eliminate detonation. All is good!