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09-08-2013, 02:50 PM
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#1 |
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Wasting Gas
Drives: 2012 Black 2SS/ZL454 Join Date: Mar 2012
Location: SD
Posts: 15
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Do I need a new tune??
Hey all,
Hopefully this is an easy question to answer, and I'm pretty sure I know what the answer is going to be but just need confirmation. My car is tuned for 93 octane and I just got stationed in Socal and all I find is 91. Do I need to get a retune for the lower octane? How bad is it running on 91 octane when I'm tuned for 93? Thanks,
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2012 Black 2SS/ZL454
Cam, Headers, CAI, UDP, SLP LM II, 470/425 |
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09-09-2013, 10:50 AM
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#2 |
 
Drives: 2SS RS ABM A6 Join Date: Jun 2010
Location: Pahrump, NV
Posts: 273
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Higher octane tunes usually mean more timing. Octane usually decreases as elevation increases (since the air is less dense). Depending on your new elevation and assuming your car is N/A, there might be nominal difference.
However, as the car detects Knock Retard (KR), it will interpolate between the High Octane (HO) Spark table and the Low Octane (LO) Spark table. Once the KR hits some magic number, the car will just shift to the LO table to protect the engine. It will stay there until the fuse pull trick that forces the reset. I'm assuming that your tuner left the LO table with less aggressive timing than the HO one. So, should you get it re-tuned? Probably so, but see how it behaves first.
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Jack Bilger
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09-09-2013, 07:19 PM
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#3 |
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Its probably not worth it to waste money on another tune. Its not like the 93 will hurt anything, your ecu will just use a lower octane fuel mapping like granatl stated.
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09-10-2013, 01:24 PM
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#4 | |
 
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,225
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Quote:
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www.jannettyracing.com
Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
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09-11-2013, 09:13 AM
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#5 |
           
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im in a similar boat...i just came from Cali to the east coast and they have 93 out here. wonder if its worth getting a re-tune to take advantage of it...not sure if its worth the money
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09-11-2013, 09:15 AM
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#6 | |
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Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,225
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Quote:
__________________
www.jannettyracing.com
Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com Last edited by JANNETTYRACING; 09-11-2013 at 09:50 AM. |
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09-11-2013, 09:35 AM
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#7 |
Drives: 70 Camaro Join Date: Feb 2013
Location: Katy, TX
Posts: 120
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Anytime you have lower octane than your car is anticipating you need to re-tune.
The risk/reward ratio just isn't there. Be safe, be smart, re-tune. |
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09-12-2013, 09:03 AM
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#8 |
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Wasting Gas
Drives: 2012 Black 2SS/ZL454 Join Date: Mar 2012
Location: SD
Posts: 15
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Thanks for the info guys, really appreciate it.. Now to find a tuner out here..
__________________
2012 Black 2SS/ZL454
Cam, Headers, CAI, UDP, SLP LM II, 470/425 |
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09-12-2013, 09:36 AM
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#9 | |
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Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,225
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Quote:
Ted.
__________________
www.jannettyracing.com
Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
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