91 Octane?
12-09-2011, 10:18 PM
#1
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91 Octane?
I drove my 911 from Miami to Maine last week and put nothing but 93 octane in it. The great Pinhead state of Maine only allows 91 octane. Should I add an octane boost to the fuel?
12-09-2011, 10:58 PM
#4
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Octane booster is a sham. You are good with 91. 91 is the top, other than 100 at some pumps, in Calif.
You can treatvyours to a half and half 100/91 mix once in a while, if available. Actually 1:4 would be good.
You can treatvyours to a half and half 100/91 mix once in a while, if available. Actually 1:4 would be good.
12-10-2011, 08:52 AM
#5
Three Wheelin'
No on the boosters, but even we have 93 here in Mississippi. Grab a tail number and a 5 gallon gas can and fill it up with AvGas. Put a few gallons and feel the peppyness . . . .
12-10-2011, 01:56 PM
#7
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What is AvGas???
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12-10-2011, 01:59 PM
#8
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That is aviation fuel, which is high octane. You have to be careful of leaded or unleaded. Leaded can trash your O2 sensor. Check around to see where race cars get their fuel. In Calif, 91 is our highest octane, but I bet we have 20 stations around SoCal that have 100 octane race fuel in one or more pumps. It ain't all bad here....
12-10-2011, 02:28 PM
#9
RL Technical Advisor
FWIW,.......
ALL Avgas is leaded; some simply have more than others and ALL have far too much lead for a car with an oxygen sensor.
Octane boosters do not work very well and carry some intended consequences from all the manganese compounds used in that stuff. If one needs/wants more octane, the right way to do this is by blending some unleaded race gas with the premium pump fuel to hit the targeted number.
ALL Avgas is leaded; some simply have more than others and ALL have far too much lead for a car with an oxygen sensor.
Octane boosters do not work very well and carry some intended consequences from all the manganese compounds used in that stuff. If one needs/wants more octane, the right way to do this is by blending some unleaded race gas with the premium pump fuel to hit the targeted number.
12-10-2011, 02:53 PM
#10
Steve,
What is your opinion of this stuff
http://www.aces-worldwide.com/aces4.html
I know that Dave Vizard (engine builder/tuner/racer/author) has done some serious testing on it with multiple engine tests/break down inspections and says it's the only additive that does what it says it does. I'd be more interested in the anti wear aspects of the top end than fuel Octane improvements.
What is your opinion of this stuff
http://www.aces-worldwide.com/aces4.html
I know that Dave Vizard (engine builder/tuner/racer/author) has done some serious testing on it with multiple engine tests/break down inspections and says it's the only additive that does what it says it does. I'd be more interested in the anti wear aspects of the top end than fuel Octane improvements.
12-10-2011, 02:53 PM
#11
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That is aviation fuel, which is high octane. You have to be careful of leaded or unleaded. Leaded can trash your O2 sensor. Check around to see where race cars get their fuel. In Calif, 91 is our highest octane, but I bet we have 20 stations around SoCal that have 100 octane race fuel in one or more pumps. It ain't all bad here....
Yes. They have it at a "76" station on Fair Oaks in Pasadena!
12-10-2011, 05:19 PM
#13
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Steve,
This is the home site for it, that above may not be the right site
http://www.bndautomotive.com/page/page/901818.htm
This is the home site for it, that above may not be the right site
http://www.bndautomotive.com/page/page/901818.htm
Hey Reiver,
Do you have any experience with the stuff?
12-10-2011, 11:25 PM
#14
Not personally but I know lots of HotRod guys that swear by it. The only reason I looked into it is because Vizard recommends the stuff (he also said use it at 50% the rec level and it still works great).
He built two Identical SBC's, mic'ed them, and ran them both on stands for quite awhile in a controlled experiment. One with, one without ACES 4. On tear down the one that used aces had 600% less wear in the piston area and similar results in the valve train, especially when it came to valve seat recession.
He annotates this in his 'How To rebuild your SBC" series. It is the only additive he's ever rec.
I will use it in the Porsche for it's top end lubricity and protection...a thing mostly lost with unleaded fuels.
My high mile car could use the help.
The Octane boost has been chronicled by lots of folks testing the stuff....google it and you'll see.
The disclaimer, I have no affiliation with anything but my wife!
He built two Identical SBC's, mic'ed them, and ran them both on stands for quite awhile in a controlled experiment. One with, one without ACES 4. On tear down the one that used aces had 600% less wear in the piston area and similar results in the valve train, especially when it came to valve seat recession.
He annotates this in his 'How To rebuild your SBC" series. It is the only additive he's ever rec.
I will use it in the Porsche for it's top end lubricity and protection...a thing mostly lost with unleaded fuels.
My high mile car could use the help.
The Octane boost has been chronicled by lots of folks testing the stuff....google it and you'll see.
The disclaimer, I have no affiliation with anything but my wife!
12-11-2011, 12:41 PM
#15
Race Director
FWIW,.......
ALL Avgas is leaded; some simply have more than others and ALL have far too much lead for a car with an oxygen sensor.
Octane boosters do not work very well and carry some intended consequences from all the manganese compounds used in that stuff. If one needs/wants more octane, the right way to do this is by blending some unleaded race gas with the premium pump fuel to hit the targeted number.
ALL Avgas is leaded; some simply have more than others and ALL have far too much lead for a car with an oxygen sensor.
Octane boosters do not work very well and carry some intended consequences from all the manganese compounds used in that stuff. If one needs/wants more octane, the right way to do this is by blending some unleaded race gas with the premium pump fuel to hit the targeted number.
Yes, you need to change the plugs more frequently, but the octane is there.