• 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!


"Ign Corr. Cyl1" AP guage

stuntdoogie

2000 Post Club
Messages
2,202
Likes
173
Location
NYC
#1
Anyone have this guage active on the AP and are experiencing negative timing with the v102 93 or any other map?
 


Colin1337

1000 Post Club
Messages
1,488
Likes
61
Location
Kirtland AFB
#2
I had it active. I only saw negative very rarely at partial throttle.
At wot I saw timing advance as much as +6*
 


OP
S

stuntdoogie

2000 Post Club
Messages
2,202
Likes
173
Location
NYC
Thread Starter #3
Im seeing -2.50 quite often especially after the cobb filter.
 


OP
S

stuntdoogie

2000 Post Club
Messages
2,202
Likes
173
Location
NYC
Thread Starter #5
I already tried BP and Sunoco on my last fillup.
 


Messages
1
Likes
15
Location
WARWICK
#6
I know Shell only gets gas from Shell...I don't know about other stations...you may have gotten some bad gypsy gas
 


Messages
248
Likes
25
Location
Chicago Burbs
#7
Only positive here in Chicago but it has been cool out, waiting to see what it does when its hot out. No filter on mine just the AP.
 


51t

Member
Messages
13
Likes
0
Location
Mission
#8
I'm getting negative numbers on 3rd gear pulls. 2nd gear is all positive up to +3.75. 3rd gear gets up to 2.25 then drops to ~-.1 then back up to 3.65. Ambient was around 70 and I have a K&N filter.

These numbers were on the first day of trying the 93 map. I tested the 91 map for a week and never saw a negative numbers. I'm using only Cevron 94 but I've heard from others/tuners the quality is poor. Every where else maxes out at 91 so Cevron is the only choice.
 


iso100

1000 Post Club
Messages
1,500
Likes
135
#9
Ambient 66? and I finally put my AP gauges on. (Had not used that feature before now) Running 93 octane fuel from Royal Farms and the 93 v102 stage 1 map.

I had no timing pull and a max of 4.5? advance. My charge temps peaked at 85?. Car is completely stock except for the AP.
 


Messages
272
Likes
109
Location
Austin
#10
I've never seen good results from Canadian 94 octane fuel, even on a 91 octane map.

If you get negative corrections in high gears from low RPM at partial throttle, that would be normal. It's a very high load situation, so it is better to downshift.

If you see negative corrections under full throttle otherwise, email a datalog to support and we can take a look at what might be going on.

Ian
 


Messages
174
Likes
12
Location
Qu?bec
#11
Just installed my ap and I went to see some family, about a 400miles roundtrip.

I have seen timing advance as much as +6.0 degrees and it went as low as -1.45 degrees. Running the 91 V102 map with 91octane fuel.

Most of the trip, I was in 6th gear @ 70mph on the cruise control. There was several hills so I guess the negative number would have been because it was too much of a load.

Other than that, super happy with the buy! :D
 


Messages
272
Likes
109
Location
Austin
#13
The most I have seen is total engine timing advance of 33.92 or something like that.So like 8.3 max per cylinder.
Ignition timing is calculated for each cylinder and will result in a solitary value that is not a concatenation of each cylinder. If Cylinder 1 fires at 34deg BTDC, this means Cylinders 2, 3, and 4 will also be very close to 34deg as well. Ignition timing correction is an individual adder for each cylinder based on knock sensor feedback and will vary for each specific cylinder. When monitoring ignition timing correction, you will want to see positive values as this indicates low levels of noise. Negative values will occur, but should not sustain. Typically, values up to -2.0 are acceptable under light load or transient situations, but if they are sustained during high load (WOT) conditions the octane level may need to be increased or the calibration changed to that of something less aggressive.

Cheers,
-Braden @ COBB
 


OP
S

stuntdoogie

2000 Post Club
Messages
2,202
Likes
173
Location
NYC
Thread Starter #14
My main and important question is can this negative timing do damage to our engine?
 


Messages
272
Likes
109
Location
Austin
#15
My main and important question is can this negative timing do damage to our engine?
Negative timing is normal at high load, this timing is occurring ATDC (after TDC) and is usually only seen at extremely low RPM. If you are referring to negative ignition timing corrections, these are not likely going to cause damage as the system is adjusting based on feedback. Over time, if these corrections remain it will make an adjustment to the OAR (Octane Adjust Ratio) which will globally lower the amount of timing that can be added to prevent knock. This OAR value will continually adjust itself as conditions change to give the most optimal combustion. Our calibrations are designed to take advantage of this dynamic system such that a fully learned OAR of -1.0 will deliver the maximum power we calibrate for.

Cheers,
-Braden @ COBB
 


Sourskittle

4000 Post Club
Messages
4,567
Likes
860
Location
Lakeland
#17
Will it also "globally increase timing" if you don't see knock for an extended amount of time the same way it decreases timing if the oct is not high enough?
 


Messages
272
Likes
109
Location
Austin
#18
Will it also "globally increase timing" if you don't see knock for an extended amount of time the same way it decreases timing if the oct is not high enough?
Yes, it has the fully capability to learn High (-1.0) and Low (1.0). It uses this value to multiply against the maximum amount entered in the Knock Sensor Timing Max. (Advance) table along with multiple other compensations to create the final timing request. The system is complex and immensely dynamic. It will work constantly to give you the most optimal and consistent burn.

Cheers,
-Braden @ COBB
 


Similar threads



Top