Manual says to use Premium Unleaded
Newbie
Joined: Sep 2002
Posts: 61
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From: Seattle, WA
Originally posted by Boosted
yea i put 103 leaded gas in my '00 Ninja 9R at the airport i fly out of, GAWD DAMN!!!!!
yea i put 103 leaded gas in my '00 Ninja 9R at the airport i fly out of, GAWD DAMN!!!!!
(Acutally, I'm not even sure if bikes have them) Seriously though, AvGas ("Low Lead" Aviation Gas) has a lot of lead in it, and will ruin O2 sensors and cats with continued use.
Last edited by CornerHard; Mar 12, 2003 at 05:42 AM.
Evolving Member
Joined: Feb 2002
Posts: 188
Likes: 0
From: Hillsboro, OR
Go to www.76.com to find 76 stations that sell 100 unleaded at the pump. $4.00 / gal should be fine with anyone driving a $30,000 car right! This fuel will NOT hurt your O2 or cat and is perfectly legal.
I have two 500 gal tanks at my house. One is for 100LL (aviation fuel) and one is for 87 octane. Like CornerHard said, 100LL and leaded race gas will damage your O2 sensor and cats over time. This is not a big deal for me and my Talon...she has a test pipe disguised as a cat.
http://www.logan.com/matt/TestPipe.jpg
Sure the O2 will take a crap eventually, but it is not used at WOT so who cares. A bad o2 will only hurt cruise gas mileage. 100LL where I live is $2.10/gal.
If Mitsubishi wanted they could design the ECU to modify the ignition timing and boost curve to match the octane of the fuel currently in the tank. A knock sensor tied into the ECU with the right noise filtering could optimize the tuning to match the fuel octane. Mitsubishi has been doing this for several years on many of its turbo cars, just not in the interest of performance. If the knock sensor in my 90 Talon reports excessive knock to the ECU, it will pull boost and timing. Why?? The car is protecting itself from either too low of an octane fuel or a malfunctioning waste gate. What would be cool is if Mitsubishi would design the ECU to add boost and advance timing until knock was detected. Throw in 100 unleaded on a 10 deg F day and your car would automatically and safely run 24 psi and make 350 hp...all controlled by the ECU. Your girl friends father throws in 87 octane on a 102 deg F day and your car backs off boost to 12 psi and the car safely makes 160 HP. We already know the EVO ECU controls the boost from 16 psi to 19 psi with a bleeder valve. I think the time is right for some one to come out with an aftermarket ECU that can do this and more. It will be called the 'Active ECU'
I have two 500 gal tanks at my house. One is for 100LL (aviation fuel) and one is for 87 octane. Like CornerHard said, 100LL and leaded race gas will damage your O2 sensor and cats over time. This is not a big deal for me and my Talon...she has a test pipe disguised as a cat.
http://www.logan.com/matt/TestPipe.jpg
Sure the O2 will take a crap eventually, but it is not used at WOT so who cares. A bad o2 will only hurt cruise gas mileage. 100LL where I live is $2.10/gal.
If Mitsubishi wanted they could design the ECU to modify the ignition timing and boost curve to match the octane of the fuel currently in the tank. A knock sensor tied into the ECU with the right noise filtering could optimize the tuning to match the fuel octane. Mitsubishi has been doing this for several years on many of its turbo cars, just not in the interest of performance. If the knock sensor in my 90 Talon reports excessive knock to the ECU, it will pull boost and timing. Why?? The car is protecting itself from either too low of an octane fuel or a malfunctioning waste gate. What would be cool is if Mitsubishi would design the ECU to add boost and advance timing until knock was detected. Throw in 100 unleaded on a 10 deg F day and your car would automatically and safely run 24 psi and make 350 hp...all controlled by the ECU. Your girl friends father throws in 87 octane on a 102 deg F day and your car backs off boost to 12 psi and the car safely makes 160 HP. We already know the EVO ECU controls the boost from 16 psi to 19 psi with a bleeder valve. I think the time is right for some one to come out with an aftermarket ECU that can do this and more. It will be called the 'Active ECU'
Newbie
Joined: Jul 2002
Posts: 78
Likes: 0
From: Las Vegas, Nevada
Everyone should worry a lot less about octane ratings!
Just as Turbo442 says, there are knock sensors that will pull back timing if knocking or detonation occur.
The ECU will compensate for higher and lower octane levels in the fuel tank. The ECU will advance timing until knock is heard, then it will pull back a tiny bit and hold timing there. If you run 91 octane for 500 miles and suddenly add 87 octane, the engine will knock when you first drive out of the gas station. But the ECU will quickly correct this by retarding the timing until the knock goes away, thus reducing horsepower.
The same is true when you exit the drag strip. When I have 117 Leaded fuel in the tank and fill 13 gallons of 91 back in the tank, the car will pop and knock slightly until the timing is set back by the ECU and knock sensor.
Best advice to everyone who is screaming for every last ounce of power:
Just buy some 100 unleaded and mix it with your normal 91 or 93 that you have. Don't bother adding octane booster, because the amount they give you in the bottle will give you insignificant gains.
The bottle of ocatne booster says : WILL ADD 7-9 OCTANE POINTS TO A FULL TANK OF GAS!!!
This does not mean 91 will turn into 98 octane
It means a full tank of 91 octane will turn into 91.7 octane.
Jeff
Just as Turbo442 says, there are knock sensors that will pull back timing if knocking or detonation occur.
The ECU will compensate for higher and lower octane levels in the fuel tank. The ECU will advance timing until knock is heard, then it will pull back a tiny bit and hold timing there. If you run 91 octane for 500 miles and suddenly add 87 octane, the engine will knock when you first drive out of the gas station. But the ECU will quickly correct this by retarding the timing until the knock goes away, thus reducing horsepower.
The same is true when you exit the drag strip. When I have 117 Leaded fuel in the tank and fill 13 gallons of 91 back in the tank, the car will pop and knock slightly until the timing is set back by the ECU and knock sensor.
Best advice to everyone who is screaming for every last ounce of power:
Just buy some 100 unleaded and mix it with your normal 91 or 93 that you have. Don't bother adding octane booster, because the amount they give you in the bottle will give you insignificant gains.
The bottle of ocatne booster says : WILL ADD 7-9 OCTANE POINTS TO A FULL TANK OF GAS!!!
This does not mean 91 will turn into 98 octane
It means a full tank of 91 octane will turn into 91.7 octane.
Jeff
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