Performance Tuning

Forum to discuss all things related to adding performance tunes to the Ford Fiesta ST.
Tr1cycle
Longevity concerns
Replies
18
Views
9,880
lessard.dcj
lessard.dcj
P
Best place to buy AP v3
Replies
18
Views
6,991
fST
fST
Hijinx
Cobb AP Boost Gauge Reading
Replies
5
Views
5,912
maperformance
maperformance
pwnall1337
Weird noise towards redline. RPM's drop and go back up near redline. datalog attached
Replies
0
Views
1,784
pwnall1337
pwnall1337
V
Gtx2860 maxd out
2
Replies
31
Views
13,311
S
STeve
D
MaxD-out on 2015 FIST
Replies
2
Views
2,659
D
danskfocus
eleven
Need Some Tuning Advice/Direction
2
Replies
28
Views
8,103
eleven
eleven
PhoenixM3
Can I use an SCT on two different Ford vehicles?
Replies
5
Views
3,957
dyn085
dyn085
C
What to monitor
Replies
10
Views
5,787
koozy
koozy
I
Power loss after installing COBB stage 1!?!?
2
Replies
34
Views
15,715
maperformance
maperformance
speed racer
Cold air intake or K&N filter
2 3
Replies
48
Views
29,523
staynumz
staynumz
Phil_R
Octane - 94 w/ up to 10% ethanol - any issues?
Replies
4
Views
3,282
Phil_R
Phil_R
C
Sedox Performance
Replies
2
Views
4,265
C
chriST
C
How intelligent are our ECUs at learning?
Replies
11
Views
6,120
dyn085
dyn085
MegaBuster
alternative stage 1 maps?
2 3
Replies
50
Views
18,404
MegaBuster
MegaBuster
BoostBumps
COBB AccessPort - New Firmware Release Announcements
Replies
12
Views
6,826
FearTheSnail
FearTheSnail
MegaBuster
what output for timing retard?
Replies
2
Views
2,112
dyn085
dyn085
V
BOOSTane
Replies
0
Views
2,137
V
vlaST
R
Power loss calulator or factor needed for density altitude
Replies
4
Views
2,215
R
RAAMaudio
M
E85 or E30
Replies
3
Views
2,407
Hijinx
Hijinx
W
AP Question
Replies
1
Views
1,646
dyn085
dyn085
P
Any afternarket turbo back exhaust system that bolts to the stock exhaust?
Replies
6
Views
3,927
Hijinx
Hijinx
C
Removing Injen and going back to AP Cobb panel?
Replies
4
Views
2,597
dyn085
dyn085
BoostBumps
New AP Firmware Update Released - Auto On / Off Feature
2 3
Replies
53
Views
16,952
me32
me32
C
How much do you think?
Replies
4
Views
3,516
C
Calfiesta987
Lizzardmax
Question for those of you who have Dyno
Replies
3
Views
2,501
DHM1
DHM
D
Talked with Mishimoto today
Replies
9
Views
3,632
C
Chuckable
C
Whats the difference between 2.5" and 3" exhausts?
Replies
11
Views
6,706
JPGC
JPGC
C
Huge variations in torque output based on minor temp changes???
Replies
9
Views
4,736
koozy
koozy
pwnall1337
Timing pulled and engine knocking cobb stage 3 Package + OTS map
Replies
12
Views
8,757
R
Randy@mountune
MAT
What's the deal with Shift Assist?
Replies
5
Views
4,315
Hijinx
Hijinx
T
cobb stage 1 vs stock focus st?
Replies
13
Views
16,034
Ghostwhite
Ghostwhite
dyn085
False Knock or nah?
2 3
Replies
59
Views
26,493
I
iso100
Snailmail
Cobb ap
Replies
2
Views
1,997
T
TruConspiracy
M
Has anyone tuned for Torco Racing additives? Like for 95-98 octane?
Replies
19
Views
6,770
R
RAAMaudio
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