76 Station right off 101 at Chesebro and Dorthy Rd. 100 Octane unleaded racing gas @5.99 Gal. with a special pump. (76 Competition 100)

Called the 76 Racing Gas distributer - he ensured me it mixes with any brand / Octane gas in So Cal (it all comes from the same pipeline) He also suggested a 50/50 mix or a 25/75 mix. I had 1/2 a tank of 91 Octane - so I topped off with 100 octane for full tank of 96 octane.

And only 19 miles one way from my house and fill up with high test racing fuel at the pump in the heart of canyon county !!

Gotta try a full tank of 100 Octane - only $110.....

 

that's like jet fuel ... why would you do that? are there any gains?

 

Actually, jet fuel is refined kerosene. This is the first of the reciprocating aircraft fuel blends inclduing 100, 115 and 145. I know of dragsters that use these fuels but I don't know any clear advantage for the average guy.

 

be carful my vette got messed up on that

 

The gas in Phoenix is SO bad (anti-smog additives, etc.). In my previous track car (Audi A4 1.8 turbo, chipped to the point it ran with the 300 hp vette's and porsches altho the quattro helped !!!) I ran 50/50 with 100 octane unleaded and it really made a difference.

Now, with the Xfire chipped, they opened a Valeo carwash right by my office in Scottsdale, and next thing I know they sell 100 octane unleaded at 6.50 a gallon. Run 25% a lot, and 50/50 when we went to the track a couple of weekends ago. It does make a difference in the response, and really smooths out the engine in the last half of the rev range. It even sounds different !!!

Ran the same in the RS4 to get rid of a stumble in the middle range that Audi says is normal -- at 50/50 it is gone, even running 104 Octane Boost didn't do the same as the racing gas.

i just wish the station wasn't so close, it's too tempting.....................

 

100 Octane? I'm jealous. We can't even get 93 here in Oklahoma. What a find!

 

There's a 76 Station in Norco on the way to the drag strip at Cali Speedway that sells it and there's another just down the street from me.

For various locations throughout California have a look at http://personal.linkline.com/dbarton..._in_SoCal.html and if you're outside California then the links at the bottom of that page might help you out.

 

BrianBrave,
You need to go over on MBworld board and under cls63amg section find Juicee63. They have track rentals and gtg racing outings all the time. You should be able to run with him if that's giving all that boost. Heck you might be able to run with their 55amg that's in the 11's. Juicee63 is way cool and will let you run with them all day. Also they have a mod that provides them with racing fuel. All in socal. Also the LX guys on srtconnection are having a big race in March in socal. You should get the DR's and have that baby ready to represent us well.
Cruzinquick

 

On a stock car, there is no benefit to running 100 Octane. If you are in one of the unlucky places that only has 91, then do a 20/80 mix and you'll have about a 93 Octane blend. Anything over that is wasting money and not helping the car at all. It may even do harm over a long period of time. There is a reason it's called RACE GAS, you don'n need it in a stock street car.

 

we have 110 here in Ocala

 

For the average car, driven by the average driver, on the average commute - your right. But...

1. My car's not stock
2. I don't commute with the car (ie.. drive 65 in the slow lane with my cc set)
3. Yes, I live where there is only 91 octane fuel (and crappy stuff at that)

so..

3. Why am I wasting my money?
4. How come there are "octane level" settings for tuning on our ECU's?
6. What kind of damage can I do to my SRT Engine? (in the long run)
7. They call it RACE GAS - because: "I FEEL THE NEED FOR SPEED!!!"

http://www.osbornauto.com/racing/index.html

http://www.pontiacstreetperformance....100racing.html

 

Thanks for the 411 - I will definitely look them up - sounds like a lot of fun..

 

Combustion temperatures are too high for most cars if you run more than 96 octane. Probably ill advised to go more than 50/50 racing blended with 91. But using 50/50 every now and then shouldn't send it into melt-down mode. Unless the ECU is mapped for the higher octane though, you're not likely to feel a difference on any pump/racing blend beyond that's north of 93 or 94 octane. Most people I've know that used pump/racing blends on occassion also had multiple maps in their aftermarket or piggy-back ECUs (usually mapped the pump/racing blend at 94 octane just to leave some safety margin). Factory maps will still treat a 96 octane pump-racing blend like it's 91.

 

When thinking of octane numbers, most automotive enthusiasts subscribe to “More’s Law,” which is: “If some’s good, more’s better.” This is frequently the case high-octane race fuel for street legal drag racing cars. So, what is octane, why is it needed, and how can it help a street machine make an occasional great pass?

The engines in many street-legal cars have been modified to improve performance. These modifications, which include aftermarket headers, carb/intake manifold, camshaft, rockers, fuel-injection system, higher compression, and modified cylinder heads with big valves, can lead to increased horsepower as a result of getting a greater amount of the proper air/fuel mixture into the engine. When more of the proper air/fuel mixture is in the combustion chamber, the cylinder pressure is greater than it would be in an unmodified engine. This increased cylinder pressure needs more octane. If the octane number of the gasoline is not high enough, it can result in detonation and destruction of the engine.

Even some unmodified engines may benefit from higher octane gasoline. As under-hood temperatures increase, the engine needs a higher octane gasoline. In a dry climate like much of the Southwest, the lower humidty also contriubtes to increased demand for octane. On a low-humidity, 100-degree day with the air conditioner on, an engine's octane appetite can increase by three to four numbers.

76 Unleaded Racing Gasoline is legal for street use and will not harm catalytic converters or oxygen sensors. It provides street engines that require high octane the opportunity to operate at maximum output with no damage from detonation. This gasoline can be used in 1960s muscle cars as well as current performance cars and has been used successfully in four-inch bore engines with aluminum heads and compression ratios up to 12.5:1. Bigger bore engines may need to use lower compression ratios.

Is this AUTHOR WRONG??

 

The only way to tell for sure what straight 100 will do in an SRT-6 is to try it. You could run the tank down near empty and just try half a tank. If there are issues you have the option to cut the octane down by adding 87 or 91. But increased compression and forced induction are not usually compatible, and without accessing or overriding the ECU code you don't have any way to change the air/fuel or ignition timing to take advantage of the additional anti-detonation margin that 100 octane should provide. If you don't see any performance difference going from a 25/75 racing-pump blend (~ 93 octane) blend to 50/50 (~ 96 octane), then why go any higher? Even if it doesn't damage anything it's still 6 bucks a gallon.

Please post your observations if you do try the straight 100.