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Old 12-23-2012, 01:19 AM   #1
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Tuning for higher octane?

WHats the point in tuning for a higher octane gas?
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Old 12-23-2012, 01:53 AM   #2
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Better performance and gas mileage.
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Old 12-23-2012, 11:52 AM   #3
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Higher octane gas can be compressed more, so that means if you are tuned for it you get bigger combustion which = more power... That's just the basic principle behind it.
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Old 12-23-2012, 12:15 PM   #4
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Quote:
Originally Posted by Soccerluvr4
Higher octane gas can be compressed more, so that means if you are tuned for it you get bigger combustion which = more power... That's just the basic principle behind it.
? Your not making sense.
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Old 12-23-2012, 12:32 PM   #5
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A higher octane gas has the ability to be compressed more (or higher, whichever word you want to use). So when your cylinder compresses say 93 octane it can compress more than say 87 octane. What happens when something is compressed more and ignited? It makes a bigger explosion, and a bigger explosion means more power. But if you are not tuned for it then your car will still compress the same amount, which means that it wont matter if it is 87 or 93 because the compression is the same. Simple Chemistry and Physics
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Old 12-23-2012, 12:35 PM   #6
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Old 12-23-2012, 08:12 PM   #7
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It makes a bigger explosion because of the higher octane rating. The only way to compress it more is by changing the pistons, or milling the heads.

---------- Post added at 09:12 PM ---------- Previous post was at 09:11 PM ----------

Quote:
Originally Posted by Soccerluvr4
A higher octane gas has the ability to be compressed more (or higher, whichever word you want to use). So when your cylinder compresses say 93 octane it can compress more than say 87 octane. What happens when something is compressed more and ignited? It makes a bigger explosion, and a bigger explosion means more power. But if you are not tuned for it then your car will still compress the same amount, which means that it wont matter if it is 87 or 93 because the compression is the same. Simple Chemistry and Physics
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Old 12-23-2012, 08:44 PM   #8
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You're both right, but he is more so. Higher octane allows more compression of the fuel. More compression equals more release in power when it's combusted.

Yes, you can't add more static compression, but when you play with timing, you can change at what part of the piston stroke the fuel is ignited. That is what tunes do. The more detonation prevention to the fuel, the more timing can be advanced and previously untapped power can be utilized. Advancing timing increases cylinder pressures and you need the extra octane to prevent detonation.

What does it mean to advance timing? You're making the fuel combust before the piston has reached the top of its stroke. This means you have to actually compress the expanding gases, increasing cylinder pressure and thus the resulting pressure against the piston on the down stroke. This extra pressure on the pistons down stroke generates more power.
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Old 12-24-2012, 02:15 AM   #9
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Quote:
Originally Posted by Sanguin
You're both right, but he is more so. Higher octane allows more compression of the fuel. More compression equals more release in power when it's combusted.

Yes, you can't add more static compression, but when you play with timing, you can change at what part of the piston stroke the fuel is ignited. That is what tunes do. The more detonation prevention to the fuel, the more timing can be advanced and previously untapped power can be utilized. Advancing timing increases cylinder pressures and you need the extra octane to prevent detonation.

What does it mean to advance timing? You're making the fuel combust before the piston has reached the top of its stroke. This means you have to actually compress the expanding gases, increasing cylinder pressure and thus the resulting pressure against the piston on the down stroke. This extra pressure on the pistons down stroke generates more power.
I'll give that an A+
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Old 12-24-2012, 03:47 AM   #10
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Quote:
Originally Posted by Sanguin View Post
You're both right, but he is more so. Higher octane allows more compression of the fuel. More compression equals more release in power when it's combusted.

Yes, you can't add more static compression, but when you play with timing, you can change at what part of the piston stroke the fuel is ignited. That is what tunes do. The more detonation prevention to the fuel, the more timing can be advanced and previously untapped power can be utilized. Advancing timing increases cylinder pressures and you need the extra octane to prevent detonation.

What does it mean to advance timing? You're making the fuel combust before the piston has reached the top of its stroke. This means you have to actually compress the expanding gases, increasing cylinder pressure and thus the resulting pressure against the piston on the down stroke. This extra pressure on the pistons down stroke generates more power.
Nerd mode activated!! Jk that was informational actually thank you
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Old 12-24-2012, 07:56 AM   #11
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Hit up Luis at Ortizperformance, he'll set you up with a great tune!
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Old 03-07-2013, 04:08 PM   #12
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Do they sell high compression pistons for the 3.7?
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