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Oct 28, 2009, 11:54 AM
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#1
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Largest scaling limit for Evo X injectors?
Does anyone know if there is a scaling limit on the Evo X ECU for injector sizing.
We have tested and tuned our new 2400cc high impedance injectors last night however in our testing it seemed that over 1350 scale, further raising the injector size did not change the fueling it appears.
Once on ethanol we were in the 1000-1100 range without an issue.
We tried as high as 2350 to see if there was an impact but could not determine if there was a change in fueling.
Also the injector latencies seemed to have little effect on idle fueling. It might have something to do with the injector's size and spray pattern however.
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2005 Evolution VIII MR
763whp/595tq HTA86
10.19 & 143.3mph stock ECU
Factory ECU Expert
2008 Evolution X GSR
12.0@113mph Full Wt+
In House Mustang Dyno AWD-500!
www.ttp-engineering.com
(407) 475-0010
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MODIFYING THE 4G63 SINCE 1995, YES 14 YEARS!
TUNING EVO V - EVO X & 2009 RALLIART!
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Oct 28, 2009, 12:10 PM
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#2
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Can the stock ECU even drive such large injectors to fully open. Might be time for a standalone AEM, Haltech, etc...
Because those are some gigantic injectors you are trying to run.
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Oct 28, 2009, 12:25 PM
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#3
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Quote:
Originally Posted by Clipse3GT
Can the stock ECU even drive such large injectors to fully open. Might be time for a standalone AEM, Haltech, etc...
Because those are some gigantic injectors you are trying to run.
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Not trying to run, have run already....
Car runs perfectly fine. Just looking for information so we know what range is capable in scaling.
TTP HIAG 2400cc injectors tested E85 TS 3586 Stock Motor!
__________________
2005 Evolution VIII MR
763whp/595tq HTA86
10.19 & 143.3mph stock ECU
Factory ECU Expert
2008 Evolution X GSR
12.0@113mph Full Wt+
In House Mustang Dyno AWD-500!
www.ttp-engineering.com
(407) 475-0010
AIM=TTPEngineering
MODIFYING THE 4G63 SINCE 1995, YES 14 YEARS!
TUNING EVO V - EVO X & 2009 RALLIART!
TTP's Myspace page!
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Oct 28, 2009, 06:51 PM
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#4
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Wait, the Z-chip doesn't compensate for 2400cc injectors? J/k.
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Oct 28, 2009, 07:39 PM
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#5
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Quote:
Originally Posted by Xcited
Wait, the Z-chip doesn't compensate for 2400cc injectors? J/k.
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We are sold out of ZChips for Evo X and our new model is used on 2010 Hyundai Genesis coupe.
Back on topic.
__________________
2005 Evolution VIII MR
763whp/595tq HTA86
10.19 & 143.3mph stock ECU
Factory ECU Expert
2008 Evolution X GSR
12.0@113mph Full Wt+
In House Mustang Dyno AWD-500!
www.ttp-engineering.com
(407) 475-0010
AIM=TTPEngineering
MODIFYING THE 4G63 SINCE 1995, YES 14 YEARS!
TUNING EVO V - EVO X & 2009 RALLIART!
TTP's Myspace page!
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Oct 28, 2009, 07:51 PM
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#6
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Quote:
Originally Posted by TTP Engineering
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2400cc still blows my mind! 
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Oct 29, 2009, 08:01 AM
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#7
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Monster injectors!
I don't have direct experience with pushing the injector size limits but likely 2400cc would need an injector scaling value around 1950 - 2000 cc plus or minus. It's very possible that past 1350 scaling the stock injector control system just wasn't setup for such large injectors. If 1350 is the limit then around 1650-1700 cc would be around the max injector size without resorting to other methods.
Other methods being:
Run a 3.5" or 4" MAF intake pipe which should slow the airflow read at the sensor considerably leaning it out. With a bigger turbo this can also relieve some restriction in the intake path.
You can also fine tune with the MAF compensation tables.
MAF Scaling Table in grams/second
Granted it's not a perfect way to do it but it should get you around the injector scaling limits if you are indeed exceeding them. You are definitely pushing the limits of what the stock ECU was setup for!
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Last edited by Hiboost; Oct 29, 2009 at 08:05 AM.
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Oct 29, 2009, 08:33 AM
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#8
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+1
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08 Evo SSS/WW Tsudo Cat-Back Exhaust (no cat)
ETS Intake, ETS DP VTA
Ecuflash/Evoscan/Gunzo 91oct map/I have tuned it now for my X (Thanks to the help of people on this forum and Evoxforums)LC-1 Wideband relocated
UR UICP,LICP and Garrett 4.5 IC
12.8@109mph no traction in 1st.
78 Corvette 406 SBC 175hp shot of juice
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Oct 29, 2009, 08:37 AM
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#9
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Silver Sponsor +1
Personal Sales Rating: ( 445)
Join Date: May 2005
Location: Central FL
Posts: 8,315
Drives: 2008 Evolution GSR SSS, 2005 Evolution MR, 2003 Evo GSR, 1995 TsiAWD, 1995 GST, 1995 Tsi 2wd, 1991 GVR4 WW, 1991 GVR4 NBM, 1993 TsiAWD, 1991 Tsi, 1995 RS N20
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Quote:
Originally Posted by Hiboost
Monster injectors!
I don't have direct experience with pushing the injector size limits but likely 2400cc would need an injector scaling value around 1950 - 2000 cc plus or minus. It's very possible that past 1350 scaling the stock injector control system just wasn't setup for such large injectors. If 1350 is the limit then around 1650-1700 cc would be around the max injector size without resorting to other methods.
Other methods being:
Run a 3.5" or 4" MAF intake pipe which should slow the airflow read at the sensor considerably leaning it out. With a bigger turbo this can also relieve some restriction in the intake path.
You can also fine tune with the MAF compensation tables.
MAF Scaling Table in grams/second
Granted it's not a perfect way to do it but it should get you around the injector scaling limits if you are indeed exceeding them. You are definitely pushing the limits of what the stock ECU was setup for! |
The car runs perfect. I just want to see if I can lean out the idle a tad.
__________________
2005 Evolution VIII MR
763whp/595tq HTA86
10.19 & 143.3mph stock ECU
Factory ECU Expert
2008 Evolution X GSR
12.0@113mph Full Wt+
In House Mustang Dyno AWD-500!
www.ttp-engineering.com
(407) 475-0010
AIM=TTPEngineering
MODIFYING THE 4G63 SINCE 1995, YES 14 YEARS!
TUNING EVO V - EVO X & 2009 RALLIART!
TTP's Myspace page!
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Offline
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Oct 29, 2009, 08:44 AM
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#10
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What is your Idle trim at? LTFT Idle.
__________________
08 Evo SSS/WW Tsudo Cat-Back Exhaust (no cat)
ETS Intake, ETS DP VTA
Ecuflash/Evoscan/Gunzo 91oct map/I have tuned it now for my X (Thanks to the help of people on this forum and Evoxforums)LC-1 Wideband relocated
UR UICP,LICP and Garrett 4.5 IC
12.8@109mph no traction in 1st.
78 Corvette 406 SBC 175hp shot of juice
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