Edge Evo settings
09-26-2010, 07:57 PM
#21
09-26-2010, 11:14 PM
#22
VanoFord2
Thread Starter
First off: If you REALLY want to grasp the concept of tuning, buy and read that book I posted. It is an excellent way to spend 20 bucks.
As the truck comes from the factory, the tunes that come with them are VERY safe. There is a ratio called the air/fuel ratio that is based off a concept in chemistry called stoichiometry. When you are just cruising around driving normal the ratio will read 14.7. This is a perfect ratio for a gas motor. However, when you go full throttle, more fuel is added and the ratio changes.
Basically the higher the stoichiometric number, the leaner(hass more air and less fuel) the motor will run. The factory makes the tune so that at full throttle the A/F ratio is rich, meaning a lot of fuel added. Iv seen readings as low as 10.5 for a stock tune. That is PIG rich.
tuning your car in the fuel trims to get your wide open throttle A/F ratio around 12.5-13 is optimal for a naturally aspired motor. It provides some of the best, safe fuel trims for performance; it also saves some gas.
You get these numbers from measuring your exhaust gas with a wideband A/F meter. DO NOT GET THIS CONFUSED WITH THOSE POS NARROW BAND GAUGES RICERS USE TO LOOK COOL! THOSE DO NOTHING.
So to recap Ch.1:
your A/F ratio is a stoichiometric relationship where the higher the number the leaner the motor, and vise versa.
14.7= cruising A/F ratio, always unless your front o2 sensors are bad*
Now, to address the timing:
87, 89, 91, 93 octane gases are not just distinguished by the different added detergents. The fundamental difference between them is whats called their heating value. the higher the octane, the higher the heating value for that gas. This higher heating value means that the gas takes longer to completely burn. Consequently, it also has more internal energy to yield from the combustion.
when you increase the timing, you fire a spark sooner. This is good for 93 octane because it has longer to burn before its fully compressed in the engine. When you increase the timing to much on an 87 octane fuel, the fuel is burnt to fast and a condition called detonation occurs. FYI, detonation, just like it sounds, is not good.
87 octane does not posses enough internal energy to utilize more than 2-3* of advanced timing without starting to detonate. So the fact that a company calls an 87 octane tune "performance" is basically a lie. LOL
Ch 2 Summary:
Octane rating tells you in a nutshell how much timing can be added.
To much timing= boom
----------------------------------------
* Natural fluctuations occur from about 14.3-15, the average is about 14.7
As the truck comes from the factory, the tunes that come with them are VERY safe. There is a ratio called the air/fuel ratio that is based off a concept in chemistry called stoichiometry. When you are just cruising around driving normal the ratio will read 14.7. This is a perfect ratio for a gas motor. However, when you go full throttle, more fuel is added and the ratio changes.
Basically the higher the stoichiometric number, the leaner(hass more air and less fuel) the motor will run. The factory makes the tune so that at full throttle the A/F ratio is rich, meaning a lot of fuel added. Iv seen readings as low as 10.5 for a stock tune. That is PIG rich.
tuning your car in the fuel trims to get your wide open throttle A/F ratio around 12.5-13 is optimal for a naturally aspired motor. It provides some of the best, safe fuel trims for performance; it also saves some gas.
You get these numbers from measuring your exhaust gas with a wideband A/F meter. DO NOT GET THIS CONFUSED WITH THOSE POS NARROW BAND GAUGES RICERS USE TO LOOK COOL! THOSE DO NOTHING.
So to recap Ch.1:
your A/F ratio is a stoichiometric relationship where the higher the number the leaner the motor, and vise versa.
14.7= cruising A/F ratio, always unless your front o2 sensors are bad*
Now, to address the timing:
87, 89, 91, 93 octane gases are not just distinguished by the different added detergents. The fundamental difference between them is whats called their heating value. the higher the octane, the higher the heating value for that gas. This higher heating value means that the gas takes longer to completely burn. Consequently, it also has more internal energy to yield from the combustion.
when you increase the timing, you fire a spark sooner. This is good for 93 octane because it has longer to burn before its fully compressed in the engine. When you increase the timing to much on an 87 octane fuel, the fuel is burnt to fast and a condition called detonation occurs. FYI, detonation, just like it sounds, is not good.
87 octane does not posses enough internal energy to utilize more than 2-3* of advanced timing without starting to detonate. So the fact that a company calls an 87 octane tune "performance" is basically a lie. LOL
Ch 2 Summary:
Octane rating tells you in a nutshell how much timing can be added.
To much timing= boom
----------------------------------------
* Natural fluctuations occur from about 14.3-15, the average is about 14.7
Now lets just keep it going ya'll and get more in-depth info from other members as well
09-27-2010, 10:35 AM
#23
Bodragaz
Join Date: Sep 2010
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I'm curious... does the Edge Evo really improve gas mileage, or primarily performance. Ever since I leveled my truck and added 305 tires, it kind of kicked my MPG in the butt! I was getting 14-15 MPG (in town) and now I'm 11-12 MPG. I did install an after market exhaust, which improved my MPG a little, but I'm looking for any other options that will help improve my overall MPG. I am also considering a CAI, but would like to try the Evo first, if it indeeds provides results.
09-27-2010, 01:42 PM
#25
VanoFord2
Thread Starter
09-27-2010, 02:08 PM
#27
Thats basically all you need to do. Take a few hours of time and play with setting. Just make sure you have 93 in the tank if you bump timing.
09-27-2010, 02:32 PM
#28
VanoFord2
Thread Starter
Let me ask ya this.The Evo does have the MPH viewing.Should i go off that since its hooked into my trucks port?My speedo is still off abit even tho i did change the settings to account for my bigger tires.
N was it ok that i filled up with 93 at half a tank,then just filled up yesterday with 87 mixing the two gasolines together and ran it on performance and towing?
09-27-2010, 02:40 PM
#29
I have started some playing with the settings.
Let me ask ya this.The Evo does have the MPH viewing.Should i go off that since its hooked into my trucks port?My speedo is still off abit even tho i did change the settings to account for my bigger tires.
N was it ok that i filled up with 93 at half a tank,then just filled up yesterday with 87 mixing the two gasolines together and ran it on performance and towing?
Let me ask ya this.The Evo does have the MPH viewing.Should i go off that since its hooked into my trucks port?My speedo is still off abit even tho i did change the settings to account for my bigger tires.
N was it ok that i filled up with 93 at half a tank,then just filled up yesterday with 87 mixing the two gasolines together and ran it on performance and towing?
The Tuner SHOULD be reporting the exact same value as the speedo, both the gauge cluster and the tuner are getting the same data from your PCM for velocity calculations. If your speedo is off, you need to have the stepper motor checked out in the cluster.
As far as playing with timing goes though, you can slowly add some timing and see if you hear pinging or get a knock code. What are the available setting for timing? Let me know and ill cook up some good setting placements for you.
Last edited by JCP281; 09-27-2010 at 02:42 PM.
09-27-2010, 06:42 PM
#30
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i just messed with my timing today on level one with 87 octane in it i raised my timing .5... truck seamed to run smoother no pinging or any other noises actually think it might have stoped some other noises that i thought was my cats going out im not real sure now! Trying to figure out now if i want to keep messing with it or just leave it alone from what iv seen on here i probably wont get much more out of the lower octane!