edge elevation and timing
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Senior Member
Joined: Oct 2007
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From: Milton, Ontario, Canada
edge elevation and timing
how high do you have to be to safely start bumping up your timing every .5 degres...
im 600ft above sea level and running lvl 2. 87 oct.. is there any adjustments i can do?
im 600ft above sea level and running lvl 2. 87 oct.. is there any adjustments i can do?
Senior Member
Joined: Feb 2004
Posts: 10,390
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Originally Posted by jonamond
how high do you have to be to safely start bumping up your timing every .5 degres...
im 600ft above sea level and running lvl 2. 87 oct.. is there any adjustments i can do?
im 600ft above sea level and running lvl 2. 87 oct.. is there any adjustments i can do?
Senior Member
Joined: Dec 2001
Posts: 341
Likes: 0
1 degree for every 2500 feet above sea level.
Here is a link from Bill: https://www.f150online.com/forums/sh...95#post2017095
Here is a link from Bill: https://www.f150online.com/forums/sh...95#post2017095
Originally Posted by ASEMechanic
Roughly 1 degree per 2 octane.
Level 3 (basically 91 octane tune) running 93 = +1 deg.
Level 2 (basically 87 octane tune) running 93 = +3 deg.
Level 3 running 100/101 = +5 deg. (This is for the rich guys!)
These are ideal values at sea level. At altitude, you should be able to add another degree per 2500 ft.
5000 ft. = +2 deg.
Just so you know, I can run level 3, +3 deg at 4500 ft with 91 octane. 4 to 4.5 degrees gets me a nice rattle on heavy throttle tip-in (low RPM throttle stomp) but actually drives quite nicely on the highway giving me another +.25 to +.5 MPG at 70 MPH versus +3 degrees timing.
I hope this helps a little.
Bill
Level 3 (basically 91 octane tune) running 93 = +1 deg.
Level 2 (basically 87 octane tune) running 93 = +3 deg.
Level 3 running 100/101 = +5 deg. (This is for the rich guys!)
These are ideal values at sea level. At altitude, you should be able to add another degree per 2500 ft.
5000 ft. = +2 deg.
Just so you know, I can run level 3, +3 deg at 4500 ft with 91 octane. 4 to 4.5 degrees gets me a nice rattle on heavy throttle tip-in (low RPM throttle stomp) but actually drives quite nicely on the highway giving me another +.25 to +.5 MPG at 70 MPH versus +3 degrees timing.
I hope this helps a little.
Bill