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Hmmm... "Dave's Timing Cascade Theory" comes to mind. I doubt it'd solve it, but boy I'd gloat if it did :-)
Even if it didn't, I'd love to have a copy of this tune just to load it up with some high octane and try it out at the drag strip... let alone the road course.
So my question is how does this work exactly. When Im driving on the street I run 93 and all is good? When Im on track can I still run 93 or is 100 a must now each and every time?
For example I do an event near my house at NJMP that is only 2 sessions, I don't make a big deal about it. Just go after work and mess around. Normally don't trailer to this and run the 93 that's in the tank.
Full events I trailer and run track tires, pads and 93 if cold and 100 if its hot out
Last edited by jdmdohcpower; 10-05-2016 at 01:22 PM.
2020 Corvette of the Year Finalist (track prepared)
C3 of Year Winner (track prepared) 2019
Would be nice if we could use an SCT or similar handheld tuner and flash back and forth between the stock tune and this WHILE maintaining warranty. Although, I question whether this 100 octane flash does not present just another avenue to deny a motor claim should something go wrong. I always use 93 octane anyway and typically top off with 100 at the track, assuming it is available.
So my question is how does this work exactly. When Im driving on the street I run 93 and all is good? When Im on track can I still run 93 or is 100 a must now each and every time?
For example I do an event near my house at NJMP that is only 2 sessions, I don't make a big deal about it. Just go after work and mess around. Normally don't trailer to this and run the 93 that's in the tank.
Full events I trailer and run track tires, pads and 93 if cold and 100 if its hot out
Yea man 100 aint cheap and if the car is running strong on a cool day which it does most of the time why pay 12 bucks a gallon.. Would like to know if by changing the tune I will be forcing myself to pay this... If so may just be batter to wait for the intercooler exchange program that was mentioned as that seems to be actually keeping the car cool where this just sounds like it allows it to run hot for longer.
Looks like someone beat me to post this! A buddy of mine sent me the PDF over lunch and I got excited. Unfortunately, I have more questions now than when I got it. Reminds me of when I ran different octane tunes with my previous Mustangs. Excuse my ignorance here but isn't this just an ECU re-calibration that allows us to use the higher octane when detected? I run 93, I'm curious if they are any gains.
Would be nice if we could use an SCT or similar handheld tuner and flash back and forth between the stock tune and this WHILE maintaining warranty. Although, I question whether this 100 octane flash does not present just another avenue to deny a motor claim should something go wrong. I always use 93 octane anyway and typically top off with 100 at the track, assuming it is available.
I don't think pump 93 is available much west of texas, so looks like this is difficult to implement in the field for those of us cursed with 91 max.
I'm sad now.
91 octane on the street is $3/gallon
91 octane at the track is $5/gallon
100 octane at the track is $9/gallon
I use 10 gallons in 20 minutes or about 50 gallons a track day, not including transportation. Pumping 100 octane puts me at $450 a track day, and well over 15 grand in gasoline costs a year.
Doing that math I can't afford it. But I'm sure someone that lives out where 93 octane is on the street and drag races, which is most of the Corvette owner circle from what I can tell, will dig this. Enjoy!
Please post up the dynos before and after. Curious to see what it's worth.
And thank you GM!
Last edited by SBC_and_a_stick; 10-05-2016 at 01:52 PM.
A normal GM tune has a high octane (91+) and low octane (87) tables.
From this description it appears they have a tune that replaces those with a high octane (100) and low octane (93).
What I think this means is:
1) with the normal tune you can drive on 87 and get away with it. On this tune the motor most likely will see damage as tune is too aggressive for 87. IE the tune will provide too much timing for 87 and cause detonation.
2) 93 will work for all cases but if you run 93 there is no value to this tune. If you overheated before you still will overheat while running 93.
3) 100 octane gas will be optimized via a tune. Could be more power but more important the tune will keep more timing in the motor.
My wonder is why this is even needed. 100 octane on the 91+ tune will make a bit less power than on 93 but with the safer tune it should accomplish the same thing in regards to overheating. Unless they are pulling even more timing in the 100 octane tune to make it even safer?
Should be interesting once an aftermarket tuner dives into this tune.
I'm no expert, but IF tuned for 100 octane, how can the car NOT make more power with 100 octane? I know it's not an apples to apples comparison, but when you look at the high end tuners such as Underground Racing, their 'racing fuel' vs. non racing fuel HP numbers are significantly different. I wouldn't a expect 'significant' difference in the C7Z, but certainly some difference.
I'm no expert, but IF tuned for 100 octane, how can the car NOT make more power with 100 octane? I know it's not an apples to apples comparison, but when you look at the high end tuners such as Underground Racing, their 'racing fuel' vs. non racing fuel HP numbers are significantly different. I wouldn't a expect 'significant' difference in the C7Z, but certainly some difference.
Totally agree if they were more aggressive on timing/tune. If they kept the timing/tune the same then power could actually go down a bit but spark knock and other power robbing situations could be delayed or not occur.
BTW On the example you gave my guess is that boost is being raised (easy on a turbo) in addition to a more aggressive tune.
10-05-2016, 11:48 AM
But I'm sure someone that lives out where 93 octane is on the street and drag races, which is most of the Corvette owner circle from what I can tell, will dig this. Enjoy!
