CAI & Tune: Which tune and octane are you using?
02-21-2007, 09:33 PM
#21
3rd Gear Member
Thread Starter
Join Date: Feb 2007
Location: WA
Posts: 840
RE: CAI & Tune: Which tune and octane are you using?
93 tune on 92 octane gas as that is the highest octane we can get in Oregon. No pinging.
Brenspeed 93 tune. Runs like ascreaming banshee compared to the 91 tune. I don't know how much faster the 93 tune is, but it sure sounds faster and meaner.
Hey, do you think that if, after running a couple of tanks of the 92 octane and try the 93 tune again and it still pings, could I ask Brenspeed for an adjusted tune with just the "pinging" description? Or would he want SCT datalogging or Dynograph?
I'd really like to run that 93 tune if at all possible - but limited to the 92 octane gas.
Thanks.
02-21-2007, 09:42 PM
#22
4th Gear Member
Join Date: Aug 2006
Location: Los Angeles, California
Posts: 1,277
RE: CAI & Tune: Which tune and octane are you using?
ORIGINAL: MartyMoose
Hmmmmmm...
Oh yea! That little test drive with the 93 tune blew me away! That's the tune I'm going after but I need to wait for a dyno to test it on. Maybe after a couple of tanks of the 92 octane I'll retry the 93 tune.
Hey, do you think that if, after running a couple of tanks of the 92 octane and try the 93 tune again and it still pings, could I ask Brenspeed for an adjusted tune with just the "pinging" description? Or would he want SCT datalogging or Dynograph?
I'd really like to run that 93 tune if at all possible - but limited to the 92 octane gas.
Thanks.
93 tune on 92 octane gas as that is the highest octane we can get in Oregon. No pinging.
Brenspeed 93 tune. Runs like a screaming banshee compared to the 91 tune. I don't know how much faster the 93 tune is, but it sure sounds faster and meaner.
Hey, do you think that if, after running a couple of tanks of the 92 octane and try the 93 tune again and it still pings, could I ask Brenspeed for an adjusted tune with just the "pinging" description? Or would he want SCT datalogging or Dynograph?
I'd really like to run that 93 tune if at all possible - but limited to the 92 octane gas.
Thanks.
02-21-2007, 11:27 PM
#23
2nd Gear Member
Join Date: Sep 2006
Location: Portland, OR
Posts: 255
RE: CAI & Tune: Which tune and octane are you using?
ORIGINAL: kenthicken
Asking for trouble. Detonation, over a period of time, will work your engine over. Very dangerous to run a motor with too much timing.
ORIGINAL: MartyMoose
Hmmmmmm...
Oh yea! That little test drive with the 93 tune blew me away! That's the tune I'm going after but I need to wait for a dyno to test it on. Maybe after a couple of tanks of the 92 octane I'll retry the 93 tune.
Hey, do you think that if, after running a couple of tanks of the 92 octane and try the 93 tune again and it still pings, could I ask Brenspeed for an adjusted tune with just the "pinging" description? Or would he want SCT datalogging or Dynograph?
I'd really like to run that 93 tune if at all possible - but limited to the 92 octane gas.
Thanks.
93 tune on 92 octane gas as that is the highest octane we can get in Oregon. No pinging.
Brenspeed 93 tune. Runs like ascreaming banshee compared to the 91 tune. I don't know how much faster the 93 tune is, but it sure sounds faster and meaner.
Hey, do you think that if, after running a couple of tanks of the 92 octane and try the 93 tune again and it still pings, could I ask Brenspeed for an adjusted tune with just the "pinging" description? Or would he want SCT datalogging or Dynograph?
I'd really like to run that 93 tune if at all possible - but limited to the 92 octane gas.
Thanks.
In most of the U.S., regular gas has an octane rating of 87, midgrade gas is 89, and premium is 91 or 92. (Octane ratings are lower in the mountain west due to the effects of thin air on internal combustion.) Contrary to widespread belief, the octane rating doesn't indicate how much power the fuel delivers; all grades of gasoline contain roughly the same amount of heat energy. Rather, a higher octane rating means the fuel is less likely to cause your engine to knock or ping. Knock, also known as detonation, occurs when part of the fuel-air mixture in one or more of your car's cylinders ignites spontaneously due to compression, independent of the combustion initiated by the spark plug. (The ideal gas law tells us that a gas heats up when compressed.) Instead of a controlled burn, you get what amounts to an explosion--not a good thing for your engine. To avoid this, high-octane gas is formulated to burn slower than regular, making it less likely to ignite without benefit of spark.
The articlealso goes on to say...
Some automotive types claim that using premium in a car designed for regular will make the engine dirtier--something about deposits on the back side of the intake valves.
If you're experiencing detonation you'd be better off running the 91 tune but since I haven't experienced any detonation I'm sticking with the 93 tune until I have her dyno'd.
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