i was wondering if it would be alright/safe to run 110 octane in a tuned cobra (tuned for 91/93)... the reason is, my town just got racing fuel on tap and i'm eager to try some! :rockon: thx!
if its C10 its leaded and will foul your o2's but thats after long-term usage.
Mixing a bit in a tank thats 3/4 91 to get yourself a nice buffer should be fine. Ive never heard any issues mixing leaded and unleaded.
Ive ran 100octane pump (unleaded) on 91 tune when i know im going to do spirited driving (IE corner carving up a mountain with altitude changes) to give myself a nice safety zone as far as knock/predetonation goes, especially when it comes to higher altitudes and less oxygen up high.
But if your tune isn't going to utilize the extra octane you'll still be pissing money away.
if its C10 its leaded and will foul your o2's but thats after long-term usage.
Mixing a bit in a tank thats 3/4 91 to get yourself a nice buffer should be fine. Ive never heard any issues mixing leaded and unleaded.
Ive ran 100octane pump (unleaded) on 91 tune when i know im going to do spirited driving (IE corner carving up a mountain with altitude changes) to give myself a nice safety zone as far as knock/predetonation goes, especially when it comes to higher altitudes and less oxygen up high.
If you are going to mix something for the sake of raising octane once in awhile, buy some Torco Accelerator. 32 Oz in 10 gallons makes 104 octane. It won't jack up your oxygen sensors. The only side effect is reddish plugs after many uses. But if your tune isn't going to utilize the extra octane you'll still be pissing money away.
When I had a 93 tune in Oklahoma I would use it to make 93 because all I could get was 91.
sounds like the temptation of trying a gallon or two is out the window... i'll probably stick to my tune rating at 91/93. thx for all the inputs on this subject guys... fist pound! :beer:
You dont need the higher octane with the higher elevation.
That is why in the mountain states there is no 93 avalible the highest you can buy is 91.
You sure its due to elevation?
Sea level here and we dont have 93......I was in vegas and only saw 91 as well. I think 93 is just based on availability.
United States: in the Rocky Mountain (high altitude) states, 85 AKI is the minimum octane, and 91 AKI is the maximum octane available in fuel[citation needed]. The reason for this is that in higher-altitude areas, a typical naturally-aspirated engine draws in less air mass per cycle due to the reduced density of the atmosphere. This directly translates to less fuel and reduced absolute compression in the cylinder, therefore deterring knock. It is safe to fill up a carbureted car that normally takes 87 AKI fuel at sea level with 85 AKI fuel in the mountains, but at sea level the fuel may cause damage to the engine. A disadvantage to this strategy is that most turbocharged vehicles are unable to produce full power, even when using the "premium" 91 AKI fuel. In some east coast states, up to 94 AKI is available [1]. In parts of the Midwest (primarily Minnesota, Iowa, Illinois and Missouri) ethanol-based E-85 fuel with 105 AKI is available [2]. Often, filling stations near US racing tracks will offer higher octane levels such as 100 AKI[citation needed] . California fuel stations will offer 87, 89, and 91 AKI octane fuels, and at some stations, 100 AKI or higher octane, sold as racing fuel. Until summer 2001 before the phase-out of methyl tert-butyl ether aka MTBE as an octane enhancer additive, 92 AKI was offered in lieu of 91.