• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Fiesta ST Forum and Fiesta ST community dedicated to Fiesta ST owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the Fiesta ST Forum today!


Altitude change tune?

Messages
143
Likes
21
Location
Austin Area
#1
I moved from Utah to Texas. Does the altitude change require an update to the tune? I do get better fuel in TX, 93 vs 91.


Sent from my iPhone using Tapatalk
 


me32

1000 Post Club
Messages
1,829
Likes
264
Location
fairfield
#3
If you are just bolt ons and running a flash tune or OTS map you dont need and tune update. But if you choose to run the 93 octane. Running a map for 93 octane will give you better performance. But it is safe to drive on the current tune.
 


alexrex20

1000 Post Club
Messages
1,472
Likes
613
Location
Spring
#4
100% safe to keep your tune. Idk if it's worth it to get a 93 tune. If you have E85 near you I would get an E30 tune. Btw welcome to Texas!

Sent from my SM-G950U using Tapatalk
 


D1JL

7000 Post Club
Staff Member
Premium Account
U.S. Navy Veteran
Messages
7,831
Likes
4,072
Location
SFV, So.Cal.
#6
I moved from Utah to Texas. Does the altitude change require an update to the tune?
This is a thing of the past and was needed with carbureted fuel systems.
Today's EFI systems use a barometric or map sensor to control changes in atmospheric air pressure.

Yes, you should change your tune based on fuel octane rating.



Dave
 


alexrex20

1000 Post Club
Messages
1,472
Likes
613
Location
Spring
#7
Yeah he may enjoy the denser air due to the lower altitude, but it all balances out because he no longer has those cool charge temps. Lol

Sent from my SM-G950U using Tapatalk
 




Top