justablur1

iTrader: (14)

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?

098z28

iTrader: (12)

there really isn't a reason to waste your money on it, unless you had a tune for it

fastSS_LS1

we've put racing gas in our 98 ss. I don't know what octane but i know it's over 100.

Dragkid1917

iTrader: (2)

if u have o2 sensors the leaded gas will burn em.

CALL911

iTrader: (17)

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.

Tainted

iTrader: (9)

you need tuning to really benefit from it, and say bye bye to your 02's

justablur1

iTrader: (14)

i have gutted cats, so it will harm the 02 sensors?

i also get a good price on this gas...not wasting any money, actually saving.

Tainted

iTrader: (9)

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.

sapper_daddy

iTrader: (12)

yeah I have seen burnt O2s from using leaded race gas like that

justablur1

iTrader: (14)

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....

KillerZO6

iTrader: (-1)

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

Red2000SS

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.

12secSS

iTrader: (30)

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.

justablur1

iTrader: (14)

this is very good info...Thanks. 20$ a tank is why i get the gas... I guess its back to 35-40$ a tank lol

dc96819

At $20 a tank i would find a way
the AV 101 is 4.50 a gal here,i use it on a boat

Black FormulaLs1

iTrader: (10)

dunno how the hell it is saving you money but post up...i would love to get some fuel like htat for less than the cost of premium!!!

Asmodeus

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.

Beast96Z

iTrader: (21)

A motor makes peak hp/tq on the brink of detonation. The further past that you go, the less you make. Basically, run the lowest octane you can run without detonation.

ssheets

iTrader: (1)

Good stuff HERE

kwiksilverz28

iTrader: (7)

Av gas is not designed for high altitude. It is 100 octance with lots of lead. It is called low lead, however, it has 8 times the lead of the old 87 octane...