| Author | Message | ||
| Paul Loussia (Bumboola)
New member Username: Bumboola Post Number: 36 Registered: 3-2003 |
I agree that 100 octane unleaded is unnecessary for street driving, unless of course, you are running a highly modified turbocharged or supercharged motor. My point is that I DO run into the knock sensor occasionally and it most definitely affects performance when it does, probably more on track days than on the street. I plan on blending the gas at a 4:1 or 5:1 ratio to give me the octane I need to avoid the timing from getting pulled back. And i'm not too keen about the idea of a 55 gallon drum of fuel in my garage! | ||
| Rob Schermerhorn (Rexrcr)
Member Username: Rexrcr Post Number: 581 Registered: 11-2002 |
We're opening another can of worms here.... For a street vehicle with knock sensors, commonly available pump fuel is fine, will not damage your engine. For Ferrari's requiring "high octane" 92 (RON+MON)/2 is perfect. Ferrari tunes for this fuel. Pumping tanks of 100 (RON+MON)/2 into your car for everyday driving is a waste of money. Maybe, maybe if you've high mileage and lots of carbon build up in the combustion chambers which increases combustion pressures, maybe a half tank of 100 plus half tank of 93 will take the knock away. Otherwise, the only time I would run a 100 (RON+MON)/2 unleaded fuel in a production car like a 360 is hard core racing where I'm concerned over water contamination and have no need for cold-start capabilities. THEN, I'd buy Phillips 66 B-35, which is oxygenated, by the 55 gallon drum, not out of an underground water-filled tank like at the corner station. B-35 RON is 104, MON is 96. It is perfect for production engines. For more information on Phillips 66 race fuels, contact Precision Automotive Research, 630-766-4402, [email protected]. | ||
| Drew Altemara (Drewa)
Junior Member Username: Drewa Post Number: 138 Registered: 2-2002 |
Most of these very high octane gasolines are made from alkalate which is a refinery intermediate product and high octane blendstock. It is also required in higher performing piston type (as opposed to turbine) aircraft. Blend components like ethanol have an octane R+M/2 blend value of about 110. Commercially, you cannot put enough alcohol into the blend to get to 100 R+M/2 before you blow one of the other specifications. Sun produces a good quality fuel and I believe uses a segregated system for distribution of their premium gasoline. I personally believe you just don't need anything higher than 92 R+M/2 for street use. | ||
| Ken (Allyn)
Member Username: Allyn Post Number: 886 Registered: 10-2001 |
360's run 11:1? Wow, I didn't realize that! I always think of Ferraris at like 8.5 but that's 308's etc. What gas does Ferrari recommend for a 360? I'm running 10.5:1 in my Lotus and I use 93 octane. I have the advance dialed in to just short of pinging. I bet you can use 93 octane in the 360 just fine as the computers in modern cars adjust the timing to deal with whatever you put in. Lower octane will affect power however. | ||
| Jack Habits (Ferraristuff)
Member Username: Ferraristuff Post Number: 572 Registered: 4-2003 |
>>>I have heard that having higher octane than what your car actually NEEDS is bad also With what I know about, purely the high octane isn't bad but it depends how they got to the high octane. Some octane boosters don't do much good to your fuel system. Jack | ||
| Jerry W. (Tork1966)
Member Username: Tork1966 Post Number: 686 Registered: 7-2001 |
I have heard that having higher octane than what your car actually NEEDS is bad also. Any truth to this? | ||
| Paul Loussia (Bumboola)
New member Username: Bumboola Post Number: 35 Registered: 3-2003 |
Omar, if you go to this site, http://www.racegas.com/gt100locals/gt100localsmainASP.asp and enter your area, you will most likely find a station close by that carries it. They also make a 104 octane unleaded that is NOT street legal and is available in my area. Yes Wayne, I am referring to my 01 Spider. My main concerns are the quality of the gas and the possiblity of alcohols (ethers?) added in to raise the octane levels. Alcohol is reportedly murder on any rubber in the fuel system. Paul | ||
| L. Wayne Ausbrooks (Lwausbrooks)
Intermediate Member Username: Lwausbrooks Post Number: 1656 Registered: 8-2002 |
Of the cars listed in Paul's profile, I would guess that he's referring to his 2001 360 Spider, which should be running a compression ratio of 11:1. According to the charts that I have on recommended octane levels, that would make 101-107 octane optimal for his engine. | ||
| Sunny Garofalo (Jaguarxj6)
Member Username: Jaguarxj6 Post Number: 458 Registered: 2-2003 |
Also, finding a station that filters down to 10-micron is nice. Sunny | ||
| Hubert Otlik (Hugh)
Member Username: Hugh Post Number: 825 Registered: 1-2002 |
Paul- 1st things 1st, what compression ratio are you running? | ||
| Omar (Auraraptor)
Member Username: Auraraptor Post Number: 562 Registered: 9-2002 |
I only use Sunoco fuel in my cars....94 octane for the BMWs, NSX, and Ferrari. I find their fuel to be better than many of the other venders in my area, but alas, we dont have 100 Sunoco octance.  | ||
| Paul Loussia (Bumboola)
New member Username: Bumboola Post Number: 34 Registered: 3-2003 |
Anybody on the thread have any experience with this 100 octane unleaded? Are Sunoco fuels considered good quality? I run into the knock sensor in the summer (told by my mechanic) and want to avoid the retardation of the timing and the lack of performance when this occurs. Also, I read the technical description of the fuel and it is oxygenated (2.7%) and contains ethers - same as ethanol? Thanks Paul |