Speed Density 2.0 (3D VE Tables, Baro)
#871
Evolving Member
iTrader: (1)
kpa to load and map volts to load are all 1:1/same on both sides, which is annoying since map to load is far from 1:1 in practice. I use the built in kavlico 5 bar scaling with the aem 5 bar map i have installed. i havent verified its right across all pressure ranges, but it shows 105kpa with engine off and the rest of the values all seem reasonable.
i also added a custom 2 byte map volt logging variable because i wanted to make sure i was logging the correct map variable that was actually used in the table lookup.
side note: changing the maf comp table at 1000hz and up seems to have affected my entire map? that single change seems to have really messed up my tune and ive been having all kinds of issues the past couple days. cruise went from perfect 15.0-15.4 afr to 13.8ish. i have closed loop completely disabled in periphery bits.
#872
Evolved Member
Well, 1:1 for map volts 2 kpa and kpa to load never worked out for me. Since i am tuning with 2150s . Omni 4 bar. anything under 100 kpa is 1:0.8 and above 100 kpa 1:1.1 ....
Currently suffering mechanical issue, full boost is very late. Perhaps a leaking waste gate diaphram or too much back pressure causing the waste gate to open.
Currently suffering mechanical issue, full boost is very late. Perhaps a leaking waste gate diaphram or too much back pressure causing the waste gate to open.
#874
Evolved Member
Alot of people might not agree with this but this worked for me.
#875
Evolving Member
iTrader: (15)
anybody getting jitter when your not in boost or vacuum....cruising along around 2700-3k like i said not in boost but just barely on the throttle.
i know there was discussions about injector latency/scaling settings possible the culprit. or could it be maf scaling even though we're on sd i know those scalings still affect tune.
i read the mrfred posts on all that. anyone know if there is a definitive answer or even know the cause. if we know why its doing it maybe we can all put our knowledge together to get it tuned out.
mines5 is right theres alot of different ways to approach tuning. but i'd def look at mechanical stuff 1st before and after making an adjustment in maps just to keep things consistent!
i know there was discussions about injector latency/scaling settings possible the culprit. or could it be maf scaling even though we're on sd i know those scalings still affect tune.
i read the mrfred posts on all that. anyone know if there is a definitive answer or even know the cause. if we know why its doing it maybe we can all put our knowledge together to get it tuned out.
mines5 is right theres alot of different ways to approach tuning. but i'd def look at mechanical stuff 1st before and after making an adjustment in maps just to keep things consistent!
#876
Evolved Member
anybody getting jitter when your not in boost or vacuum....cruising along around 2700-3k like i said not in boost but just barely on the throttle.
i know there was s about injector latency/scaling settings possible the culprit. or could it be maf scaling even though we're on sd i know those scalings still affect tune.
i read the mrfred posts on all that. anyone know if there is a definitive answer or even know the cause. if we know why its doing it maybe we can all put our knowledge together to get it tuned out.
mines5 is right theres alot of different ways to approach tuning. but i'd def look at mechanical stuff 1st before and after making an adjustment in maps just to keep things consistent!
i know there was s about injector latency/scaling settings possible the culprit. or could it be maf scaling even though we're on sd i know those scalings still affect tune.
i read the mrfred posts on all that. anyone know if there is a definitive answer or even know the cause. if we know why its doing it maybe we can all put our knowledge together to get it tuned out.
mines5 is right theres alot of different ways to approach tuning. but i'd def look at mechanical stuff 1st before and after making an adjustment in maps just to keep things consistent!
Please read , Last page , post 227 and onwards.
https://www.evolutionm.net/forums/pr...-build-12.html
Same Sd jitter issue as we all are experiencing. This solution was also discussed and implemented in one of Mfred's thread.
#879
Evolving Member
iTrader: (15)
Yes Sandman, i have tuned 3 different SD roms with different injector combo and all of them had that jitter. In 9653 you feel it the most.
Please read , Last page , post 227 and onwards.
https://www.evolutionm.net/forums/pr...-build-12.html
Same Sd jitter issue as we all are experiencing. This solution was also discussed and implemented in one of Mfred's thread.
Please read , Last page , post 227 and onwards.
https://www.evolutionm.net/forums/pr...-build-12.html
Same Sd jitter issue as we all are experiencing. This solution was also discussed and implemented in one of Mfred's thread.
#880
94172715 SD Rom Evo 8mr JDM
Hi Guys..
anyone had used this rom and solve the jitter issues at RPM 2000 ?
need help here..tried all advised written but still on solve..monitored the AFR at RPM2000...the gauge shown sudden 9.0 afr at the RPM2000 andd made my car jitter...please helps...
anyone had used this rom and solve the jitter issues at RPM 2000 ?
need help here..tried all advised written but still on solve..monitored the AFR at RPM2000...the gauge shown sudden 9.0 afr at the RPM2000 andd made my car jitter...please helps...
#881
Evolved Member
Jitter - 9 AFR @ 2000 rpm.
1- Some people have resolved this issue using fuel pulsation damper. Some still experience it.
2- 9 AFR @ 2k rpm is a tuning issue.
#882
94172715 SD Rom Evo 8mr JDM
can you help me to check and comment my tuning ? I might be not expert and willing to learn from the expert. Can we communicate through email ?..I shall email my rom to you.
Hope you can help me by your expertise.
awaiting your email address.
or you can reach me at nurulazlan.sahat@yahoo.com.my
#883
Evolved Member
hi mate,
can you help me to check and comment my tuning ? I might be not expert and willing to learn from the expert. Can we communicate through email ?..I shall email my rom to you.
Hope you can help me by your expertise.
awaiting your email address.
or you can reach me at nurulazlan.sahat@yahoo.com.my
can you help me to check and comment my tuning ? I might be not expert and willing to learn from the expert. Can we communicate through email ?..I shall email my rom to you.
Hope you can help me by your expertise.
awaiting your email address.
or you can reach me at nurulazlan.sahat@yahoo.com.my
#884
Evolving Member
iTrader: (6)
I just started using the 941 version, currently tweaking ve table in order to hit afr values in fuel table, so far everything is fine. I am not experiencing any jitters, if there is a jitter it is so minor that I haven't noticed anything yet. I have about 20-30 miles on this rom, a good amount of those miles are wot logging. Car is an 05 evo 8 that has basic bolt ons for now. I am experiencing some intermittent misfire/breakup ever since I turned up the boost but it has nothing to with this rom because it did the same thing on the oem maf rom that I was tuning earlier.