100 octane
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100 octane
i havent been at the track for awhile but when i went last weekend i noticed that they have 100 octane unleaded. would my car like it or would i have any issues. i know not to use the leaded stuff but i was wondering if this unleaded stuff would be ok. any use it or have any info on it? i may want to try this out thursday when we all go to the track 
Wasn't me
Joined: Mar 2004
Posts: 42
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You can use it, but you won't get all the benefits if you don't have some sort of timing and fuel management. Will it hurt anything, no. Will it help, a little. Will help fight detonation at slightly higher boost.
Leaded gas is only really bad if you have a cat, or if you're worried about 02 sensor life.
Good luck!
Leaded gas is only really bad if you have a cat, or if you're worried about 02 sensor life.
Good luck!
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..jab
..jab
"color blind kid"
Joined: Aug 2002
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Don't the computers learn... what ever happen with that jazz. I say pump it then do the shiv quick learn thing and it should show some gains. This is all in theory as I have not done 100 octane or the shiv quick learn.
TTwins are my fav
Joined: Nov 2004
Posts: 895
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Originally Posted by saintjab
You can use it, but you won't get all the benefits if you don't have some sort of timing and fuel management. Will it hurt anything, no. Will it help, a little. Will help fight detonation at slightly higher boost.
Leaded gas is only really bad if you have a cat, or if you're worried about 02 sensor life.
Good luck!
Leaded gas is only really bad if you have a cat, or if you're worried about 02 sensor life.
Good luck!
i felt slightly sharper throttle response, but nothing earth-shattering (was it psychosomatic?? i dunno!). if (when) i get remapped, (and when ecutek supports the 04/05 map switcher) a 100 octane map would be nice to have for use. until then, the gains are minimal and arent nearly worth the price if you're not specifically tuned for it.....
my station has 100 oct and 110 octane, but the 110 is leaded (agree w/ above that it'll ruin cats and O² sensors, but how soon after i dont know). i have also heard the 110 has a dye in it that public officials can test for in your tank with a insertion device of sorts....
Wasn't me
Joined: Mar 2004
Posts: 42
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Yes, they will learn to some degree, but A/Fs are limited. To go as lean as you want to go with race fuel you need something to either re-map the ecu or a piggy back.
In my Evo there are two fuel maps.. What I've done is re-mapped the low octane map to 93 octane settings (instead of 87), and the high octane map to 100. That way I can go to the track fill-up with 100 and raise the boost a little.
In my Evo there are two fuel maps.. What I've done is re-mapped the low octane map to 93 octane settings (instead of 87), and the high octane map to 100. That way I can go to the track fill-up with 100 and raise the boost a little.
Originally Posted by blackwagon
Don't the computers learn... what ever happen with that jazz. I say pump it then do the shiv quick learn thing and it should show some gains. This is all in theory as I have not done 100 octane or the shiv quick learn.
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..jab
..jab
