Injector scaling and latecy for different injectors.
Mar 18, 2008, 09:13 AM
#422
Here is what I used on PTE 880s that I scaled yesterday:
Scaling 731
Latency
3.312
2.184
1.32
0.96
0.696
0.408
0.288
The car was an Evo 9 with all the bolt-ons and HKS cams. Trims maxed out at -4 for the mid and +2.6 for the low.
Treat them as a starting point only. I have noticed that PTE injectors are harder to scale than the Densos and RCs that I have scaled.
Scaling 731
Latency
3.312
2.184
1.32
0.96
0.696
0.408
0.288
The car was an Evo 9 with all the bolt-ons and HKS cams. Trims maxed out at -4 for the mid and +2.6 for the low.
Treat them as a starting point only. I have noticed that PTE injectors are harder to scale than the Densos and RCs that I have scaled.
Mar 26, 2008, 02:28 AM
#424
Evolving Member
iTrader: (1)
Join Date: Jun 2006
Location: San Diego
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
fuel trim low: -10
fuel trim mid: -4
still haven't had the time to go for a cruise. my mods are similar to the one you set these for just w/ a HFC and arc box. any input on this as far as getting the lows closer to zero?
Mar 26, 2008, 11:29 AM
#427
Evolved Member
iTrader: (26)
Join Date: Nov 2005
Location: San Diego, CA
Posts: 717
Likes: 0
Received 0 Likes
on
0 Posts
Anybody here run FIC 1050/1150's or RC 1200's on stock ECU? I want to go big and never have to worry about tuning for the FP Green or E85 again 
But they also need to run halfway decent on 91 gas as well.
But they also need to run halfway decent on 91 gas as well.
Mar 26, 2008, 01:54 PM
#428
Evolved Member
iTrader: (12)
Join Date: Aug 2005
Location: ¯\(º_o)/¯
Posts: 2,251
Likes: 0
Received 0 Likes
on
0 Posts
Here is what I used on PTE 880s that I scaled yesterday:
Scaling 731
Latency
3.312
2.184
1.32
0.96
0.696
0.408
0.288
The car was an Evo 9 with all the bolt-ons and HKS cams. Trims maxed out at -4 for the mid and +2.6 for the low.
Treat them as a starting point only. I have noticed that PTE injectors are harder to scale than the Densos and RCs that I have scaled.
Scaling 731
Latency
3.312
2.184
1.32
0.96
0.696
0.408
0.288
The car was an Evo 9 with all the bolt-ons and HKS cams. Trims maxed out at -4 for the mid and +2.6 for the low.
Treat them as a starting point only. I have noticed that PTE injectors are harder to scale than the Densos and RCs that I have scaled.
Yeah but the nice thing about the Evo 9s are the Trims are reset after flash so changes occur much quicker than the Evo 8's, Thanks for the info though.
Apr 1, 2008, 08:53 PM
#429
I have a question about fuel trims. I installed RC 1000 cc injectors and used the following scaling/latency:
The above gave me a +4 trims. After that I reduced the latency to 835. That gave me a -3 trim for both lo and hi.
So which is better for fuel economy a fuel trim of +4 or a fuel trim of -3. I think it is -3, but I want to check with you guys.
The above gave me a +4 trims. After that I reduced the latency to 835. That gave me a -3 trim for both lo and hi.
So which is better for fuel economy a fuel trim of +4 or a fuel trim of -3. I think it is -3, but I want to check with you guys.
Last edited by alan678; Apr 1, 2008 at 08:56 PM.
Apr 17, 2008, 11:36 AM
#430
Evolving Member
Phew, just completed 29 pages worth of lesson. Could I use PTE680 scaling and latency with my Sard 700cc injector?
My current Mitsulogger showing
FTL FTM FTH
12 12 12
12 12 12
12 12 12
While Evoscan showing:
FTH FTM FTL
111.71875 100 100
Which one give more accurate reading?
My current Mitsulogger showing
FTL FTM FTH
12 12 12
12 12 12
12 12 12
While Evoscan showing:
FTH FTM FTL
111.71875 100 100
Which one give more accurate reading?
Apr 17, 2008, 07:06 PM
#431
Phew, just completed 29 pages worth of lesson. Could I use PTE680 scaling and latency with my Sard 700cc injector?
My current Mitsulogger showing
FTL FTM FTH
12 12 12
12 12 12
12 12 12
While Evoscan showing:
FTH FTM FTL
111.71875 100 100
Which one give more accurate reading?
My current Mitsulogger showing
FTL FTM FTH
12 12 12
12 12 12
12 12 12
While Evoscan showing:
FTH FTM FTL
111.71875 100 100
Which one give more accurate reading?
Apr 19, 2008, 11:06 PM
#432
After reading through all 29 pages and prinitng out settings for my model injectors (FIC 1000's) and getting totally frustrated by the fact that the scaling provided didnt work I finally started changing latency to get a smooth idle and ended up with RC1200 latency settings on the AEM chart. What was weird is the trims could be within + or - 3% range with posted settings but idle was rough. I thought injectors might be bad fouled plugs loose vacuum line etc. but they all checked out. besides the only thing that I changed was the injectors.
Is it safe to assume these injectors just flow a lot as the latency values have to be so high to get them to operate properly?
I am in regroup mode and will "attack" again tomorrow.
OH yeah they are scheduled to open an E85 station in the area can't wait and will spread news to the North San Diego peeps when/if this station is a reality.
Is it safe to assume these injectors just flow a lot as the latency values have to be so high to get them to operate properly?
I am in regroup mode and will "attack" again tomorrow.
OH yeah they are scheduled to open an E85 station in the area can't wait and will spread news to the North San Diego peeps when/if this station is a reality.
Apr 20, 2008, 05:19 AM
#433
Account Disabled
iTrader: (3)
Join Date: Apr 2006
Location: USA
Posts: 1,029
Likes: 0
Received 0 Likes
on
0 Posts
A rough idle is usually due to running too lean at idle. What is your AFR at the exact same time the car is running "rough". If the trims are maxed out and/or the car isn't in feedback it will be forced to go overly lean and get a lumpy idle (that sounds cool) but really causes a lot of stalling issues etc. You may have to add a few micro seconds of deadtime.
Apr 20, 2008, 11:04 AM
#435
A rough idle is usually due to running too lean at idle. What is your AFR at the exact same time the car is running "rough". If the trims are maxed out and/or the car isn't in feedback it will be forced to go overly lean and get a lumpy idle (that sounds cool) but really causes a lot of stalling issues etc. You may have to add a few micro seconds of deadtime.
Thanks for the reply by the way