Whats the max octane i can use?
Whats the max octane i can use? Ok guys, i usually fill up at 110 octane in my 3rd gen. it never messed it up ( it was a carbed 350) BUt anywho, I just bought a 1998 ss and im wondering if i can put the same kinda gas without hurting it. I get my gas from the airport, they call it av gas... Is it safe?
If you still have the catylitic converters in it, that octane might take them out. Besides that, I agree with 098z28. It will not give you any more power, and will be a waste of money unless you are running a certain application like a highly boosted, FI application, or you are worried about detonation from running too much timing, or worried that you may have a bad tank of gas from being too old, as the octane level will drop untreaded over a long period of time.
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you have 4 02 sensors. fronts, which are critical, and you have the rears, for the cats which just throw codes and dont actually effect anything.
it will ruin the fronts and the rears, but seeing as youre are gutted no need to worry about the rears.
it will ruin the fronts and the rears, but seeing as youre are gutted no need to worry about the rears.
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Another question, What if the 02 sensors go bad in these things? I took off my 02 sensors on my 3rd gen, Didnt really do anything to it but chec kengine light. But everything ran spiffy....
it will make the car run in closed loop mode and wont a full potential. the o2 read how much air and fuel is in ur exhaust and modifies your fuel vs air to make it run better.
you should get wide bans for the front 2 and get o2 sims for the back 2
you should get wide bans for the front 2 and get o2 sims for the back 2
Launching!
Joined: Nov 2001
Posts: 246
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From: Plano, TX
Without the front O2 sensors will run in open loop - it only runs in closed loop if the front 02 sensors are working and warmed up.
Any higher then 94 octane is just wasting your money and power. LS1 typically run best with 91-94 octane, any higher and you begin to loose power due to the extra timing needed to fully combust the mixture, even if tuned. With 91-94 octane, you should be able to run anywhere from 24-29 degrees of timing ... the sweet spot for LS1 to make power. Running higher octane (100 and up) actually slows down the combustion process (this is how octane works, higher octane is less volatile), and if it is too slow the max combustion pressure will not happen at TDC, where it is need for max torque.
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Joined: Apr 2006
Posts: 1,875
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From: Naperville, IL
av gas designed for high altitude doesn't mess with anything?
I remember going over this a long long time ago on turbobuick.com and I recall the majority saying that it wasn't a substitution for racing fuel.
I remember going over this a long long time ago on turbobuick.com and I recall the majority saying that it wasn't a substitution for racing fuel.
