My Tune/Octane of Fuel
04-11-2007, 04:51 PM
#1
5th Gear Member
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Join Date: Jun 2006
Location: Eureka, Mo
Posts: 4,355
My Tune/Octane of Fuel
My tuner tuned my car to 93 octane a couple weeks ago. At the time, the fuel in the car was 87, and it caused no problems. The tuner said it was weird that there was no spark knock...and he confirmed with me the other day that he had tuned it for 93. He told me that as long as there is no spark knock, there is no problem, and it would be ok for me to try other octanes.
Anyone else have their car tuned for 93 and still be able to run on 87 no problem?
Anyone else have their car tuned for 93 and still be able to run on 87 no problem?
04-11-2007, 04:52 PM
#2
Underboss
Join Date: Jan 2006
Location: Helaware
Posts: 20,273
RE: My Tune/Octane of Fuel
ORIGINAL: BleedinBlue
My tuner tuned my car to 93 octane a couple weeks ago. At the time, the fuel in the car was 87, and it caused no problems. The tuner said it was weird that there was no spark knock...and he confirmed with me the other day that he had tuned it for 93. He told me that as long as there is no spark knock, there is no problem, and it would be ok for me to try other octanes.
Anyone else have their car tuned for 93 and still be able to run on 87 no problem?
My tuner tuned my car to 93 octane a couple weeks ago. At the time, the fuel in the car was 87, and it caused no problems. The tuner said it was weird that there was no spark knock...and he confirmed with me the other day that he had tuned it for 93. He told me that as long as there is no spark knock, there is no problem, and it would be ok for me to try other octanes.
Anyone else have their car tuned for 93 and still be able to run on 87 no problem?
04-11-2007, 04:54 PM
#3
4th Gear Member
Join Date: Jan 2006
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RE: My Tune/Octane of Fuel
No if it is tuned for 93 and you have 87 it shouldn't technically run right and you would experience det. I run a 93 tune on my xcal and only run 93 but if I get bad gas I have a tune I can swap in so it doesn't det.
04-11-2007, 05:10 PM
#4
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RE: My Tune/Octane of Fuel
I've only put probably 150 miles on it since the tune/gears, and about 135 miles of that was with 93. I know for sure though, that the day he tuned it there wasn't anything but 87 in the tank. I don't know, its just weird.
04-11-2007, 06:03 PM
#7
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Join Date: Jul 2006
Location: Pittsburg, CA (BAY AREA!)
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RE: My Tune/Octane of Fuel
ORIGINAL: BleedinBlue
My tuner tuned my car to 93 octane a couple weeks ago. At the time, the fuel in the car was 87, and it caused no problems. The tuner said it was weird that there was no spark knock...and he confirmed with me the other day that he had tuned it for 93. He told me that as long as there is no spark knock, there is no problem, and it would be ok for me to try other octanes.
Anyone else have their car tuned for 93 and still be able to run on 87 no problem?
My tuner tuned my car to 93 octane a couple weeks ago. At the time, the fuel in the car was 87, and it caused no problems. The tuner said it was weird that there was no spark knock...and he confirmed with me the other day that he had tuned it for 93. He told me that as long as there is no spark knock, there is no problem, and it would be ok for me to try other octanes.
Anyone else have their car tuned for 93 and still be able to run on 87 no problem?
You can try higher octanes, but never lower.
04-11-2007, 06:10 PM
#9
3rd Gear Member
Join Date: Oct 2006
Location: Valley of the Sun
Posts: 824
RE: My Tune/Octane of Fuel
What altitude are you at? Here in the Sierras, I drive between 6200ft-4500ft, making my 9:1 compression more like 8:1 or lower when I'm on the mountain. As you know, that cuts down the octane need alot. If your above 4000 feet or more you may not suffer the ping effect as easily.
04-12-2007, 06:29 PM
#10
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RE: My Tune/Octane of Fuel
ORIGINAL: CoolAid
What altitude are you at? Here in the Sierras, I drive between 6200ft-4500ft, making my 9:1 compression more like 8:1 or lower when I'm on the mountain. As you know, that cuts down the octane need alot. If your above 4000 feet or more you may not suffer the ping effect as easily.
What altitude are you at? Here in the Sierras, I drive between 6200ft-4500ft, making my 9:1 compression more like 8:1 or lower when I'm on the mountain. As you know, that cuts down the octane need alot. If your above 4000 feet or more you may not suffer the ping effect as easily.
And that also explains why the local Mustang club says stock GT's usually run high 13's to low 14's, don't it?
