100 octane ??
Thread Starter
Intermediate
Joined: Oct 2011
Posts: 30
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From: los angeles ca
Melting Slicks
Joined: Nov 2010
Posts: 2,622
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From: On the east coast we drive until we die
Race Director
Joined: Aug 2000
Posts: 17,992
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if your car requires 93 and in cali you can only get 91, then mixing in a gal. or two of 100 will help. It will increase the octane. Overdoing it (too much octane) will cause you to lose power as already noted by others.
If your looking for an edge, go with just enough gas to win the race, i.e show up with 1/4 tank (ish) instead of a full tank to save weight.
If your looking for an edge, go with just enough gas to win the race, i.e show up with 1/4 tank (ish) instead of a full tank to save weight.
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
like others said, the higher octane fuel produces less power on an engine that isnt tuned for it. octane is detonation resistance. you get more power by a more aggressive tune - something which can cause predetonation. the higher octane fixes that issue, but at the cost of some energy content. less energy = less power, but this loss doesnt matter if the tune is aggressive enough; with a stock engine its a different story.
btw watch out about posting about street racing. out of the few thousand members there are a handful people on this site that will raise all hell if you talk about doing anything like speeding on the highway or street racing... then the mods come in and lock the thread and make all sorts of threats. its really annoying so we have to basically talk about everything in that spectrum of things as if it is at a track or on a piece of private property - some also use the term "deserted mexican road"
Race Director
Joined: Dec 2005
Posts: 11,743
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From: God's Country, ID
btw watch out about posting about street racing. out of the few thousand members there are a handful people on this site that will raise all hell if you talk about doing anything like speeding on the highway or street racing... then the mods come in and lock the thread and make all sorts of threats. its really annoying so we have to basically talk about everything in that spectrum of things as if it is at a track or on a piece of private property - some also use the term "deserted mexican road"
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Burning Brakes
Joined: Aug 2011
Posts: 967
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NO
since you have that, get ahold of Diablew
he makes custom tunes for that
be surprised what you will pick up from just the canned tunes
he can also make a tune with more aggressive tunning to use the 100oct
i'd say use the 100 oct if your also using N20
can help ya from not needing to use a timing retard when on the squeeze
ohhhh yeah... it does have a nice burn smell to it too
PS:
i sent the X pipe out yesterday
since you have that, get ahold of Diablew
he makes custom tunes for that
be surprised what you will pick up from just the canned tunes
he can also make a tune with more aggressive tunning to use the 100oct
i'd say use the 100 oct if your also using N20
can help ya from not needing to use a timing retard when on the squeeze
ohhhh yeah... it does have a nice burn smell to it too
PS:
i sent the X pipe out yesterday
Advanced
Joined: Apr 2009
Posts: 66
Likes: 1
100 octane will give you no benefit, and it should not reduce your power either. Its when you start getting into the higher 105+ level octane "low lead and leaded" fuels and oxygenated fuels is when your fuel trims go to hell if your not tuned for it. And you only see "serious" power gains with high octane if your running boost and or a high compression motor with correct tuning anyways.
Safety Car
Joined: Nov 2011
Posts: 3,712
Likes: 343
From: Norman OK
100 octane will give you no benefit, and it should not reduce your power either. Its when you start getting into the higher 105+ level octane "low lead and leaded" fuels and oxygenated fuels is when your fuel trims go to hell if your not tuned for it. And you only see "serious" power gains with high octane if your running boost and or a high compression motor with correct tuning anyways.
how much no one knows, I would think 5-15hp would be a nice guess.
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 262
From: St. Louis, MO
St. Jude Donor '08
It'll help. I will use a gallon if I find my car knocking and it cures it.
Also check out this good empirical data proving the gain with some interesting information.
http://forums.corvetteforum.com/c6-z...-analysis.html
Also check out this good empirical data proving the gain with some interesting information.
http://forums.corvetteforum.com/c6-z...-analysis.html
Advanced
Joined: Apr 2009
Posts: 66
Likes: 1
Originally Posted by superscout03
100 octane will give you no benefit, and it should not reduce your power either. Its when you start getting into the higher 105+ level octane "low lead and leaded" fuels and oxygenated fuels is when your fuel trims go to hell if your not tuned for it. And you only see "serious" power gains with high octane if your running boost and or a high compression motor with correct tuning anyways.
Seriously? lol and what actually was not correct about my post? I know what Octane rating is idiot and stated nothing in my post about its purpose. But I love your response yeah because its such a twilight zone mystery?
100 octane will give you no benefit, and it should not reduce your power either. Its when you start getting into the higher 105+ level octane "low lead and leaded" fuels and oxygenated fuels is when your fuel trims go to hell if your not tuned for it. And you only see "serious" power gains with high octane if your running boost and or a high compression motor with correct tuning anyways.
This is not correct. Octane is the fuel resistance to detonation, higher octane fuel burns slower which is how it fights off detonation. His car may very well make less power while on 100 octane if he is not tuned for it.
how much no one knows, I would think 5-15hp would be a nice guess.
how much no one knows, I would think 5-15hp would be a nice guess.
Melting Slicks
Joined: Nov 2010
Posts: 2,622
Likes: 195
From: On the east coast we drive until we die
It'll help. I will use a gallon if I find my car knocking and it cures it.
Also check out this good empirical data proving the gain with some interesting information.
http://forums.corvetteforum.com/c6-z...-analysis.html
Also check out this good empirical data proving the gain with some interesting information.
http://forums.corvetteforum.com/c6-z...-analysis.html
Melting Slicks
Joined: Nov 2010
Posts: 2,622
Likes: 195
From: On the east coast we drive until we die
Originally Posted by superscout03
100 octane will give you no benefit, and it should not reduce your power either. Its when you start getting into the higher 105+ level octane "low lead and leaded" fuels and oxygenated fuels is when your fuel trims go to hell if your not tuned for it. And you only see "serious" power gains with high octane if your running boost and or a high compression motor with correct tuning anyways.
Seriously? lol and what actually was not correct about my post? I know what Octane rating is idiot and stated nothing in my post about its purpose. But I love your response yeah because its such a twilight zone mystery?
100 octane will give you no benefit, and it should not reduce your power either. Its when you start getting into the higher 105+ level octane "low lead and leaded" fuels and oxygenated fuels is when your fuel trims go to hell if your not tuned for it. And you only see "serious" power gains with high octane if your running boost and or a high compression motor with correct tuning anyways.
Seriously? lol and what actually was not correct about my post? I know what Octane rating is idiot and stated nothing in my post about its purpose. But I love your response yeah because its such a twilight zone mystery?
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 262
From: St. Louis, MO
St. Jude Donor '08
I added my link above to back up my comment that I think it would help him - please read that, it's pretty interesting.
Safety Car
Joined: Nov 2011
Posts: 3,712
Likes: 343
From: Norman OK
Awe now we resort to calling people idiots, booohooo let me grab my binkie and go crawl up next to your mom so I can get some comfort.
Dude get a grip on yourself and dont act like a douche.
You said 100 octane will give you no benefit, and it should not reduce your power either
While you are partly correct you are wrong on the second half as it will reduce power. I have seen on the dyno more times than I care to count. If the motor is not built or tuned to need 100 octane fuel then it is not only a waste of $$$ it will also reduce power as well.
So please come up with some other whitty remark/response next.
Dude get a grip on yourself and dont act like a douche.
You said 100 octane will give you no benefit, and it should not reduce your power either
While you are partly correct you are wrong on the second half as it will reduce power. I have seen on the dyno more times than I care to count. If the motor is not built or tuned to need 100 octane fuel then it is not only a waste of $$$ it will also reduce power as well.
So please come up with some other whitty remark/response next.
Melting Slicks
Joined: Nov 2010
Posts: 2,622
Likes: 195
From: On the east coast we drive until we die
That is very interesting. I guess a little extra octane can be beneficial, especially when running 91. I didn't read the entire thread but I wonder at what point does the octane become too much where it does actually cause a loss of power/performance? I guess every car will be different based on mods and environmental conditions, but I would assume straight race or even more than a 50/50 pump/race mix is at the limit?
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 262
From: St. Louis, MO
St. Jude Donor '08
That is very interesting. I guess a little extra octane can be beneficial, especially when running 91. I didn't read the entire thread but I wonder at what point does the octane become too much where it does actually cause a loss of power/performance? I guess every car will be different based on mods and environmental conditions, but I would assume straight race or even more than a 50/50 pump/race mix is at the limit?