Fuel Recommendation
02-03-2005, 03:03 PM
#21
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Join Date: Oct 2004
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RE: Fuel Recommendation
I have to run premium in my Mach1. The computer will automatically adjust no matter what grade you use, so don't worry about which grade you use, but Ford recommends premium in mine. I would go with what your manual says.
02-03-2005, 03:20 PM
#22
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Join Date: Apr 2004
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RE: Fuel Recommendation
ORIGINAL: jdaniel
Are you nucking futs? It has everything to do with knocking properties. The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
We dont drive diesel engines you know? Ignition due to compression in a gasoline engine IS NOT good! Thus the reason you use higher octane. To prevent detonation caused by the early combustion of fuel.
Are you nucking futs? It has everything to do with knocking properties. The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
We dont drive diesel engines you know? Ignition due to compression in a gasoline engine IS NOT good! Thus the reason you use higher octane. To prevent detonation caused by the early combustion of fuel.
You're obviously right JD but I stole the following info just to clarify it for anyone who is still confused.
The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
This is interesting too.
The name "octane" comes from the following fact: When they refine crude oil, they end up getting hydrocarbon chains of different lengths. These different chain lengths can then be separated from each other and blended to form different fuels. For example, methane, propane and butane are hydrocarbons. Methane has one carbon atom. Propane has three carbon atoms chained together. Butane has four carbon atoms chained together. Pentane has five, hexane has six, heptane has seven and octane has eight carbons chained together.
02-04-2005, 08:00 PM
#23
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Join Date: Dec 2004
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Posts: 1,019
RE: Fuel Recommendation
Very interesting fellas, you learn something new everyday 
I never really looked into octane ratings but now I got it all cleared up. Quick question though, when you guys up your timing do you use a tuner or what?
I never really looked into octane ratings but now I got it all cleared up. Quick question though, when you guys up your timing do you use a tuner or what?
02-05-2005, 04:23 AM
#25
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RE: Fuel Recommendation
ORIGINAL: ONE BAD GT
I use a steeda timing adjuster. Tuners work also but with the timing adjuster you can advance or retard more.
I use a steeda timing adjuster. Tuners work also but with the timing adjuster you can advance or retard more.
How much of a hp gain do you normally get from advancing the timing? I'm sure it depends a bit on the mods you have but what's a good average?
02-06-2005, 12:07 AM
#27
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Join Date: Jun 2004
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Posts: 764
RE: Fuel Recommendation
you can use 87 if you stay stock. supercharger will require you to use high octane. LS1Intruder gave a good explanation on this. someone thought that the octane will give you more hp and better times in quarter. which turned out to be false. id use what ford recommends. anything else would be a waste of money.
02-06-2005, 03:46 AM
#28
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Join Date: Feb 2005
Location: Anaheim, CA
Posts: 616
RE: Fuel Recommendation
U can get Toluene at any Sherin Williams store. It's 114 octane, but a pain in the *** to add every tank.
1 gal Toluene: 9 gal 91 octane yields 94 in the tank. Its a waste of time and $$ unless your tune is set right... switch chip so you have a 94 and a 91 octane tune. If you have a stock tune, run 87, anything else is a waste of $$.
1 gal Toluene: 9 gal 91 octane yields 94 in the tank. Its a waste of time and $$ unless your tune is set right... switch chip so you have a 94 and a 91 octane tune. If you have a stock tune, run 87, anything else is a waste of $$.
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