Custom tuning?
#1
Custom tuning?
I have an Edge (which i will be sending to PHP whenever they get back from a well deserved vacation) and i got some bigger tires. Ive been driving on Level 2, if i change my tire size (295/70/17 = 2574) can i still run on level 2 canned tune or do i have to run a completely custom tune (where i have to input everything manually)?
Basically i want to change my tire size but still run Level 2.
Basically i want to change my tire size but still run Level 2.
#2
I have an Edge (which i will be sending to PHP whenever they get back from a well deserved vacation) and i got some bigger tires. Ive been driving on Level 2, if i change my tire size (295/70/17 = 2574) can i still run on level 2 canned tune or do i have to run a completely custom tune (where i have to input everything manually)?
Basically i want to change my tire size but still run Level 2.
Basically i want to change my tire size but still run Level 2.
One other thing, you need to deduct at least 3% for the squish factor, if you didn't.
__________________
Jim
Jim
#5
It is the amount your tire flattens out. I had to deduct 5% to get mine accurate. Just depends how important 2 or 3 mph is to you. I want mine accurate.
__________________
Jim
Jim
#6
i thought the Edge would correct the Factory speedo, cause my GPS says 65, Edge says 66, and my truck says 69.
When i input my tire size heres what i did, tell me if it saved my level 2,
Power Settings
Level 2
Would you like to custom tune, YES
changed my gear ratio to 355 and my tire size
then i hit done.
When i input my tire size heres what i did, tell me if it saved my level 2,
Power Settings
Level 2
Would you like to custom tune, YES
changed my gear ratio to 355 and my tire size
then i hit done.
#7
i thought the Edge would correct the Factory speedo, cause my GPS says 65, Edge says 66, and my truck says 69.
When i input my tire size heres what i did, tell me if it saved my level 2,
Power Settings
Level 2
Would you like to custom tune, YES
changed my gear ratio to 355 and my tire size
then i hit done.
When i input my tire size heres what i did, tell me if it saved my level 2,
Power Settings
Level 2
Would you like to custom tune, YES
changed my gear ratio to 355 and my tire size
then i hit done.
![lol](https://www.f150online.com/forums/images/smilies/lol.gif)
__________________
Jim
Jim
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#8
well my gryphon/edge kept defaulting to one size bigger than my actual size that I programmed in (2563vs.2559). Note: both of these sizes were much larger than the original default size in the canned tuning (it was 2335 or something). Anyway, the larger size (2563) is bang on with my GPS and truck speedo....and truck rpm's!
Now I input 2554 or something and it rounds up and saves my 2559. It seems to want to round up slightly for some reason....even when I save my settings. No matter 2559 and 2563 are so frikken close it don't matter. 4mm is pretty miniscule. I certainly do not need to deduct another 3-5% to get it accurate though???
Now I input 2554 or something and it rounds up and saves my 2559. It seems to want to round up slightly for some reason....even when I save my settings. No matter 2559 and 2563 are so frikken close it don't matter. 4mm is pretty miniscule. I certainly do not need to deduct another 3-5% to get it accurate though???
Last edited by Chris_74; 09-16-2008 at 05:26 PM.
#9
Direct exerpt from manual:
Circumference Equation:
[(width * ratio * 0.02) + (rim * 25.4)] * 3.1415
Steps:
1. Multiply Width, Ratio and 0.02
2. Multiply Rim and 25.4
3. Add Step #1 with Step #2
4. Multiply Step #3 with 3.1416
5. The result will be the circumference of your tire in mm.
My edge and speedo pretty dead on w/o the squish factor, using these calculations
Circumference Equation:
[(width * ratio * 0.02) + (rim * 25.4)] * 3.1415
Steps:
1. Multiply Width, Ratio and 0.02
2. Multiply Rim and 25.4
3. Add Step #1 with Step #2
4. Multiply Step #3 with 3.1416
5. The result will be the circumference of your tire in mm.
My edge and speedo pretty dead on w/o the squish factor, using these calculations
#10
#11
Bill uses an equation that includes it. Since it can vary from 3% to 5%, it is often left to the user. I had to use 3% on my previous tires and 5% on my current tires, to get agreement with a GPS.
__________________
Jim
Jim