Sunoco Racing fuel
09-08-2010, 04:16 PM
#16
"Interesting that ethanol fuel is trading near gas prices, so combined with the decrease in MPG - there is currently no real economic advantage."
09-08-2010, 04:43 PM
#17
Rennlist Member
I don't care what that article you read says, using 100+ octane race fuel does not impart any measurable performance benefit in a 997. I have the traqmate data to back up this claim.
09-08-2010, 07:09 PM
#18
Rennlist Member
Careful. If you keep using wobbly word gravy like "get up and go" and "brighter" to describe engine power characteristics they're going to have to move this thread to the newly-created audiophiles board.
I don't care what that article you read says, using 100+ octane race fuel does not impart any measurable performance benefit in a 997. I have the traqmate data to back up this claim.
I don't care what that article you read says, using 100+ octane race fuel does not impart any measurable performance benefit in a 997. I have the traqmate data to back up this claim.
Without changing the ECU, you're not going to get any measurable benefits from running Sunoco 100.
09-08-2010, 07:12 PM
#19
09-08-2010, 07:18 PM
#20
Rennlist Member
There should be no appreciable difference in a 997 with anything over 91.
09-08-2010, 07:22 PM
#21
Did you hear and ping or single knock when blipping the throttle going from third to second? What about on "tip in"?
09-08-2010, 07:23 PM
#22
Three Wheelin'
Unless you are running a motor/dme combination that is optimized for "racing fuel" (or any Octane over 93), you are wasting your money. The SCCA did a real nice write up about 2 months ago covering the whole issue.
In a typical Porsche street/race car (non-cup) you are better off saving the cash and getting more seat time!
In a typical Porsche street/race car (non-cup) you are better off saving the cash and getting more seat time!
09-08-2010, 07:48 PM
#23
Race Director
The problem in California is that you can only get 91 octane at regular gas stations, and our cars are designed for optimum performance at 93. I have no objective measurements or even subjective "wobbly word gravy" as Nugget put it (nicely done 
) to suggest that there is a noticeable performance difference between 91 and 93. However, just to make myself feel better for autox events, I mix 100 Sunoco with pump gas to get a blend that's equivalent to 93-94 octane. I agree that anything more than that would be wasting my money, but at least this way I'm theoretically getting optimum performance from the fuel. For street driving, it's not worth the extra expense to blend, IMO.
) to suggest that there is a noticeable performance difference between 91 and 93. However, just to make myself feel better for autox events, I mix 100 Sunoco with pump gas to get a blend that's equivalent to 93-94 octane. I agree that anything more than that would be wasting my money, but at least this way I'm theoretically getting optimum performance from the fuel. For street driving, it's not worth the extra expense to blend, IMO.
09-08-2010, 08:19 PM
#24
Nordschleife Master
The problem in California is that you can only get 91 octane at regular gas stations, and our cars are designed for optimum performance at 93. I have no objective measurements or even subjective "wobbly word gravy" as Nugget put it (nicely done ) to suggest that there is a noticeable performance difference between 91 and 93. However, just to make myself feel better for autox events, I mix 100 Sunoco with pump gas to get a blend that's equivalent to 93-94 octane. I agree that anything more than that would be wasting my money, but at least this way I'm theoretically getting optimum performance from the fuel. For street driving, it's not worth the extra expense to blend, IMO.
) to suggest that there is a noticeable performance difference between 91 and 93. However, just to make myself feel better for autox events, I mix 100 Sunoco with pump gas to get a blend that's equivalent to 93-94 octane. I agree that anything more than that would be wasting my money, but at least this way I'm theoretically getting optimum performance from the fuel. For street driving, it's not worth the extra expense to blend, IMO.
09-08-2010, 08:23 PM
#25
Three Wheelin'
in that is the rub... The powers which control all do not care a rats backside about what the crap does to the seals, o-rings, fuel lines nor mileage... WAIT! are we not under directives to improve fuel consumption ratings...
09-08-2010, 08:27 PM
#26
Rennlist Member
Because Ethanol brings down the price of gasoline when mixed in with conventional RBOB fuel. Since most people don't drive around in Porsches, they want the cheapest gas possible - up until recently, 87 octane fuel could be reduced by about 5 cents a gallon when mixed with ethanol.
Interesting that ethanol fuel is trading near gas prices, so combined with the decrease in MPG - there is currently no real economic advantage.
But the farm lobby has a tremendous amount of leverage - so, we will have gas with ethanol in it and pay more for everything that consumes corn.
Interesting that ethanol fuel is trading near gas prices, so combined with the decrease in MPG - there is currently no real economic advantage.
But the farm lobby has a tremendous amount of leverage - so, we will have gas with ethanol in it and pay more for everything that consumes corn.
Farm lobby it is, specially corn farmers. People are waking up to how bad the High Fructose Corn Syrup is (that replaced Cane Sugar in most foods in the 80s), and are requesting Cane/Beet Sugar specifcially; but the farm lobby is spending millions spinning that the processed corn syrup is the same as natural cane sugar!
09-08-2010, 09:06 PM
#28
Rennlist Member
Is there an actual federal legislation to enforce gas companies to include Ethanol in ALL gas sold across all states (regardless of Octane)?
09-08-2010, 11:57 PM
#30
Race Director
+1...absolutly true.
I track my car mostly at Sebring where they have Sunoco 93, 98,110 unleaded NO ETHANOL fuel. I've tried all sorts of combo's and anything above 93 is a waste of money. As a matter of fact you can not tell any difference between a top tier 93 with up to 10% ethanol or the Sunoco 93 no ethanol. This is the track under full throttle. On the street no way you can tell any difference as you are not running the car anywhere near like I am at the track.
I track my car mostly at Sebring where they have Sunoco 93, 98,110 unleaded NO ETHANOL fuel. I've tried all sorts of combo's and anything above 93 is a waste of money. As a matter of fact you can not tell any difference between a top tier 93 with up to 10% ethanol or the Sunoco 93 no ethanol. This is the track under full throttle. On the street no way you can tell any difference as you are not running the car anywhere near like I am at the track.