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i3 91 & 93 Octane Tune

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Moderator: sohfast94

Post Fri Jan 11, 2019 1:37 pm

Posts: 11
I have a 2018 Camaro SS LT1
If I load the 93 octane tune & then fill up with 91 will it cause any problems?

Post Fri Jan 11, 2019 2:31 pm

Posts: 17438
Location: CT

if you're only using 91 octane gas, then you want to install the 91 octane tune... it has lower timing settings than 93 so it's meant for 91 octane..

the 93 octane tune has higher timing settings made for the higher 93 octane.
06MonteSS / DiabLew Tune
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2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

Post Fri Jan 11, 2019 2:47 pm

Posts: 11
I would like to know how much timing is increased from 91 to 93

Post Fri Jan 11, 2019 2:51 pm

Posts: 17438
Location: CT

depends on the rpm, and load/airflow bud... just for an example, it could be 2* in some spots, and could be 6* in other spots... it all depends... it's not just a flat number across the board...
06MonteSS / DiabLew Tune
Image
2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

Post Fri Jan 11, 2019 5:20 pm

Posts: 11
The knock sensor will retard timing if it starts to ping, my old '86 Camaro did this & had one of the first laptop programs for cars back then. 6 degrees is nothing if that is max. for 2 octane numbers.

Post Fri Jan 11, 2019 6:18 pm

Posts: 17438
Location: CT

Again, those numbers were just for an example... could be higher than that..could be 10* - 12* higher ... don't have a tune open in front of me.
06MonteSS / DiabLew Tune
Image
2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

Post Fri Jan 11, 2019 6:50 pm

Posts: 11
What if the fuel doesn't contain any ethanol, 100% 91 octane & then there are some fuels that have up to 10% ethanol in there 91 octane. Does the canned tune for 91 work immediately so I can make a drag pass or does it require driving a certain distance for the ECM to learn?

Post Mon Jan 14, 2019 6:56 pm

Posts: 11
Cat got your tongue, do you have an answer for my above question?

Post Wed Jan 16, 2019 8:37 am

Posts: 54316
Location: DiabloSport World Headquarters

The PCM monitors e content and can adjust accordingly if needed.
It doesnt need to learn octane, it figures that out quick, As soon as you hammer it the knock sensors are listening for bad noises and if they hear them, they will ask the pcm to pull timing.
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST


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