FIC 750's scaling and latency issues and THE MEGA FIC 750 thread (hopefully)
#16
Evolved Member
iTrader: (22)
Join Date: Nov 2003
Location: Northern KY near Cincy
Posts: 2,408
Likes: 0
Received 6 Likes
on
6 Posts
750 Injectors
Scaling 650
3.312
1.680
1.032
.864
.648
.552
.360
I put in the 650 scaling above and the mid trim at cruise is nearly perfect. +1.23. BUT, low trim still won't adjust for me. It stays on "0".
Another strange thing I am getting is that after the car is driven and warmed up it won't hold idle. It wants to go full rich and die. If I let it sit for a while it eventually stabilizes to idle again. Then the mid fuel trim that was perfect at cruise is now -11.56 but the car will idle. Low still hasn't moved.
As I start cruising again mid trim will go back to +1.23 or so and hold steady. I roll to a stop and just as before the car wants to go full rich and stall. After a while it will stabilize but the mid trim, yet again, goes to around -11. And still "0" on the low trim.
What gives.
Scaling 650
3.312
1.680
1.032
.864
.648
.552
.360
I put in the 650 scaling above and the mid trim at cruise is nearly perfect. +1.23. BUT, low trim still won't adjust for me. It stays on "0".
Another strange thing I am getting is that after the car is driven and warmed up it won't hold idle. It wants to go full rich and die. If I let it sit for a while it eventually stabilizes to idle again. Then the mid fuel trim that was perfect at cruise is now -11.56 but the car will idle. Low still hasn't moved.
As I start cruising again mid trim will go back to +1.23 or so and hold steady. I roll to a stop and just as before the car wants to go full rich and stall. After a while it will stabilize but the mid trim, yet again, goes to around -11. And still "0" on the low trim.
What gives.
#18
Evolved Member
iTrader: (50)
750 Injectors
Scaling 650
3.312
1.680
1.032
.864
.648
.552
.360
I put in the 650 scaling above and the mid trim at cruise is nearly perfect. +1.23. BUT, low trim still won't adjust for me. It stays on "0".
Another strange thing I am getting is that after the car is driven and warmed up it won't hold idle. It wants to go full rich and die. If I let it sit for a while it eventually stabilizes to idle again. Then the mid fuel trim that was perfect at cruise is now -11.56 but the car will idle. Low still hasn't moved.
As I start cruising again mid trim will go back to +1.23 or so and hold steady. I roll to a stop and just as before the car wants to go full rich and stall. After a while it will stabilize but the mid trim, yet again, goes to around -11. And still "0" on the low trim.
What gives.
Scaling 650
3.312
1.680
1.032
.864
.648
.552
.360
I put in the 650 scaling above and the mid trim at cruise is nearly perfect. +1.23. BUT, low trim still won't adjust for me. It stays on "0".
Another strange thing I am getting is that after the car is driven and warmed up it won't hold idle. It wants to go full rich and die. If I let it sit for a while it eventually stabilizes to idle again. Then the mid fuel trim that was perfect at cruise is now -11.56 but the car will idle. Low still hasn't moved.
As I start cruising again mid trim will go back to +1.23 or so and hold steady. I roll to a stop and just as before the car wants to go full rich and stall. After a while it will stabilize but the mid trim, yet again, goes to around -11. And still "0" on the low trim.
What gives.
#21
Evolving Member
iTrader: (19)
Join Date: Jun 2007
Location: Lincolnton, NC
Posts: 346
Likes: 0
Received 0 Likes
on
0 Posts
Also realize that at idle you may be at ~12.5v-13v and not 11.72v and that any changes at the actual idle voltage will be averaged between the 11.72 and 14.06 range. It interpolates between the different numbers.
To be sure you can just look at evoscan during idle when the trims are adjusting, and see where the voltage sits at during those adjustments.
#22
Evolved Member
iTrader: (6)
Scaling 650
4.69v- 3.312
7.03v- 1.680
9.38v- 1.032
11.72v- 1.008
14.06v- .720
16.41v- .552
18.68v- .360
Low = 5.22
Mid = -.290
High = .1008
So I checked my idle and I'm at about 14.1-13.8v. That's good I think. Also, I changed the above 11.72v to 1.008, but I see that my 11.72v is very close to my 9.38v. I now am wondering when am I at 9.38v, and do I need to space that voltage farther apart from the 11.72v?
Also, is it my cam duration thats throwing my number off of the normal posted numbers like John Bradleys ?
Thanks again.
4.69v- 3.312
7.03v- 1.680
9.38v- 1.032
11.72v- 1.008
14.06v- .720
16.41v- .552
18.68v- .360
Low = 5.22
Mid = -.290
High = .1008
So I checked my idle and I'm at about 14.1-13.8v. That's good I think. Also, I changed the above 11.72v to 1.008, but I see that my 11.72v is very close to my 9.38v. I now am wondering when am I at 9.38v, and do I need to space that voltage farther apart from the 11.72v?
Also, is it my cam duration thats throwing my number off of the normal posted numbers like John Bradleys ?
Thanks again.
#23
Evolved Member
Hi Guys, sorry to bring up this old post again but im wondering how update is the FIC 750cc Injectors Scaling & Latency here now?
Should i follow the Latency table from FIC or Mr John Bradly?
Thanks
Should i follow the Latency table from FIC or Mr John Bradly?
Thanks
Last edited by jameswwt; Dec 10, 2014 at 04:04 PM.
#26
Evolved Member
Update : FIC 750cc Injector - Latency & Scaling
Using FIC latency table = Car AF/R - 11.5-12.5
Using John Bradley latency table = Car AF/R - 14-15.5 Superb!
(I adjusted the SD VE% table on the lower load to get it further leaner a bit)
Car just a little hesitation to fire up even engine is fully warm up.
Any idea on how to improve the engine start up?
Using FIC latency table = Car AF/R - 11.5-12.5
Using John Bradley latency table = Car AF/R - 14-15.5 Superb!
(I adjusted the SD VE% table on the lower load to get it further leaner a bit)
Car just a little hesitation to fire up even engine is fully warm up.
Any idea on how to improve the engine start up?
#27
Evolved Member
Hi Guys,
im having some problem with my idling as initially my 14.5-1.57AFR range with Mr JohnBradly latency table but now duno why its suddenly go extremely lean 17-18+AFR? Tried increase the latency % little by little but its either extremely Rich or Extremely Lean.
Latency table by JohnBradly vs FIC table.
JB = Very Lean / FIC = Very Rich 11.2-12.5Afr
Using JB table the car afr is very lean and the rpm is low (900-1000)
Using FIC table the car afr very rich but rpm is (1000-1200)
What can i do? Can i tweak on the SD VE %?
Thanks
im having some problem with my idling as initially my 14.5-1.57AFR range with Mr JohnBradly latency table but now duno why its suddenly go extremely lean 17-18+AFR? Tried increase the latency % little by little but its either extremely Rich or Extremely Lean.
Latency table by JohnBradly vs FIC table.
JB = Very Lean / FIC = Very Rich 11.2-12.5Afr
Using JB table the car afr is very lean and the rpm is low (900-1000)
Using FIC table the car afr very rich but rpm is (1000-1200)
What can i do? Can i tweak on the SD VE %?
Thanks
Last edited by jameswwt; Dec 22, 2014 at 01:15 AM.
Thread
Thread Starter
Forum
Replies
Last Post