Performance Tuning

Forum to discuss all things related to adding performance tunes to the Ford Fiesta ST.
K
Timing retard under boost? -4 to -6 degrees
Replies
6
Views
2,477
S
Sam4
frankiefiesta
  • Poll
Poll: How many have blown a FiST engine?
2 3 4
Replies
73
Views
65,724
TyphoonFiST
TyphoonFiST
Fordman
Airflow measurement/calculation (Cobb AP3)
Replies
3
Views
1,648
4sfed4
4sfed4
F
Dizzy E40a tune
Replies
17
Views
6,528
F
Feisty Fiesta7
anticon
Has anyone tried the Dizzy E40a Tune w/ 7 psi Wastegate?
Replies
12
Views
5,764
Raziel510
Raziel510
SwissLime
Should I tune for 91 and just run 93 for an extra margin of safety?
2
Replies
36
Views
24,627
SwissLime
SwissLime
G
Stratified crackle tune or DizzyPop?
2
Replies
27
Views
12,456
E
Erick_V
SwissLime
Keeping Ethanol tuning simple. 1:1 ratio E46?
Replies
5
Views
1,658
EnthusiaST
EnthusiaST
B
Stage 2 Cobb OTS
Replies
3
Views
2,185
KnockOff
KnockOff
T
stratified blows my mind....
2
Replies
22
Views
7,970
bustervic
bustervic
358R
Mountune Tune Characteristics or just FiST Characteristics
2
Replies
36
Views
8,269
XR650R
XR650R
P
Top tier E85 needed for tune?
Replies
3
Views
2,660
R
Rocketst
drewcrolwey
Coolant Temps Still High After Installing Mountune Radiator
Replies
17
Views
6,282
TemecFist
TemecFist
C
Mountune 215 question
Replies
1
Views
1,278
XR650R
XR650R
LastMK7
No More Tuning From CPE
2 3
Replies
48
Views
9,367
M-Sport fan
M-Sport fan
Cornfedfiesta
Chasing wandering afr...
Replies
1
Views
1,570
Muldoon
Muldoon
T
So... apprently my engine keeps adding timing regardless of knock detected
2
Replies
20
Views
5,395
T
Thecanadianst
T
Negative corrections on pre-installed maps that come with AP, youre thoughts?
2
Replies
33
Views
6,060
T
Thecanadianst
TemecFist
Boost leak tester
Replies
7
Views
2,329
TemecFist
TemecFist
xxiaze
Post your power ratings!
Replies
13
Views
3,012
Sakel
Sakel
Indyteecee
How bad are my charge temps? Should I get an inter cooler?
Replies
19
Views
5,115
Philld_with_donuts
Philld_with_donuts
N
Need help installing 2j racing cowl intake to 2019 FIST
Replies
8
Views
3,149
N
Nutmeg
T
pro tune or stratified?
2
Replies
21
Views
8,960
M-Sport fan
M-Sport fan
Geebs
E30 tune...maybe
Replies
12
Views
3,207
M-Sport fan
M-Sport fan
Shikari
Stock 2018 Fiesta ST Map - COBB
Replies
1
Views
2,242
Hypergram
Hypergram
G
Defouler or no defouler?
Replies
7
Views
7,960
TyphoonFiST
TyphoonFiST
M
Ethanol Mixing
Replies
2
Views
2,022
Se7eN
Se7eN
xxiaze
G25-550 make 600whp?
2 3
Replies
48
Views
14,852
M-Sport fan
M-Sport fan
anticon
COBB Stage 0 "Stock Simulation" OAR Stuck at -0.79 - What's the Deal?
Replies
18
Views
6,952
pwnall1337
pwnall1337
Sekred
TOLUENE as a Octane Booster
2
Replies
22
Views
11,892
D
DanD83
WutApex
Oil drip following GFB install
Replies
7
Views
2,769
J
jayrod1980
C
Now I'm part of the "where did my boost go" club....
Replies
8
Views
2,243
Rhinoserious
Rhinoserious
C
Will weather affect e-tuning?
Replies
14
Views
8,609
TemecFist
TemecFist
M
Cobb Accessport OTS tune clarification
Replies
5
Views
2,568
Dpro
Dpro
S
How safe are Cobb OTS tunes?
2
Replies
32
Views
19,741
G
green_henry
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