09-19-2011, 10:39 AM | #1 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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Difference between 91 & 93 oct tune
What is the HP and Torque of a tune using 91 Vs 93 Oct?
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09-20-2011, 03:09 PM | #2 |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,225
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It varies with combination but typically about 10 hp per octane point.
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09-21-2011, 11:55 AM | #3 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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Thanks for the information.
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09-21-2011, 12:28 PM | #4 |
Drives: Firehawk Join Date: Jun 2009
Location: Port Huron
Posts: 213
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We see about 8-10 rwhp loss from 93 to 91 oct. on a bolt on's car
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11-16-2011, 11:17 AM | #5 |
Drives: 2010 2SSRS headers/CAI/tune/corsa, Join Date: May 2010
Location: Commerce twp Michigan
Posts: 1,413
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93 octane tune using 91 octane (dyno tune on car ) like when I am out of my area and they do not offer 93 can I use 91 or add the octane boost in a can ?
Will I have to do the fuse pull thing after gong back to 93. |
11-16-2011, 11:37 AM | #6 | |
'69 Owned Since '79
Drives: '69 Z/28 LeMans Blue w/White Join Date: Oct 2008
Location: LR AR
Posts: 1,847
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Quote:
You CAN run 91 octane gas on a 93 octane tune BUT you are risking damage if you push the pedal down much at all. It will take at least two 93 octane gas tank refills to get all the 91 octane gas out of the system. -Mark. |
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11-16-2011, 12:20 PM | #7 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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I would think mixing 91 and 93 together in 1/2 prorations would give 92? Is the engine that critical that a difference could be noticed?
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11-16-2011, 03:10 PM | #8 |
'69 Owned Since '79
Drives: '69 Z/28 LeMans Blue w/White Join Date: Oct 2008
Location: LR AR
Posts: 1,847
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Depends how close to the edge your tune is.
If you tune for 91, you give up a few HP on the table but have an extra margin of safety. If you tune for 93 and put 91 in the tank, you can break your pistons top ring land off (or worse) during a hard run. Do a search here and see the pix for yourself. It ain't pretty. -Mark. |
11-16-2011, 05:29 PM | #9 |
Drives: 2010 2SSRS headers/CAI/tune/corsa, Join Date: May 2010
Location: Commerce twp Michigan
Posts: 1,413
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My car was tuned with 93
? can I use octane boost in a pinch . Like keep a can in the trunk Just in case. |
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