Whats the max octane i can use?
#21
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You will not pick anything up from using it....unless your application needs it. Are you a buily high compression motor that is experiencing detonation or knock.....
Then there is no need....get the 93 or whatever is available, and you will make the same power...if not more.
Then there is no need....get the 93 or whatever is available, and you will make the same power...if not more.
#23
If I planned on tuning my ls1 to run on a 93/110 mix would it be faster than just 93 or just 100. How high octane can you tune for on a stock engine and make the most power?
#24
The highest unleaded octane easily available is about 100 octane, higher then this and most fuels use lead to boost octane, you do not want to run lead all the time in an EFI equipped engine.
#26
there are actuall 6 types of avgas, but the new avgas is rated at 80(red) 100(green) and 100Low Lead(blue). At something like $4-5 a gallon i sure wouldn't be wasting money on it. And if your getting it for 20 bucks a tank, your probably getting the old stuff the airport won't put in the planes. So it's likely stale nasty gas. This is coming from an a+p tech in training.
#27
Launching!
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Resurrecting this OLD dead thread... Octane - how much is too much or how little is not enough...
I completely agree with this statement:
BUT - I know the LS1's have a "low octane table" to help avoid knock. Is there anyone that can get technical about this with proven evidence for what the MINIMUM octane is before the car pulls timing or what the Maximum is before you start loosing power?
FWIW I run Shell's 93 octane in a bolt on, stock internal/bottom end. Is there any reason to change? I used but couldn't find anything other than speculation (and this thread)
I completely agree with this statement:
FWIW I run Shell's 93 octane in a bolt on, stock internal/bottom end. Is there any reason to change? I used but couldn't find anything other than speculation (and this thread)
#28
Guy I bought my car from put regular in it and it ran poorly. I ran 93 only in it, and then had it tuned. when we had the hurricane and there was no gas, I put in a few gallons of 108 or something like that, and now I get a P0131 code for one of my O2s.
so ill stick with 93
so ill stick with 93
#33
TECH Junkie
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E85 is completely different from regular gas. Normal gas is only like 10 percent ethanol. E85 is 85 percent.
#35
TECH Senior Member
...
I completely agree with this statement:
BUT - I know the LS1's have a "low octane table" to help avoid knock. Is there anyone that can get technical about this with proven evidence for what the MINIMUM octane is before the car pulls timing or what the Maximum is before you start loosing power?
...
I completely agree with this statement:
BUT - I know the LS1's have a "low octane table" to help avoid knock. Is there anyone that can get technical about this with proven evidence for what the MINIMUM octane is before the car pulls timing or what the Maximum is before you start loosing power?
...
so be careful to not rely on the LO table and/or the knock sensors
( tune to avoid knock )