fbikawi

iTrader: (1)

i am new to ECU flash i am trying to learn from all of u.

i logged AFR using LC1 LogWorks and i found it -comparing to what i read on this forum- too lean? LC1 in new and i followed the installation calibration steps.

sensor is installed just before the decat pipe.

i couldnt log AFRMAP using LogWorks 2 to calculate Load. any help

load = 5*injscaling*(IPW-IL)/AFRMAP where
IL = -0.1026*V+1.8741

and mitsulogger do not support LC1 wideband.

attached is AFR (RPM vs Inj Pulse).

what do u think of this AFR and how can i log or calculate load so i can compare with the stock map?

thanks

fbikawi

iTrader: (1)

this is also a screen from data log lab for a WOT pull just to show u the knock.

the knock is max of 11 counts but it is sometime showing 17 or more near rev limiter ???

please note that the load is calculated using the formula

load = 5*injscaling*(IPW-IL)/AFRMAP where
IL = -0.1026*V+1.8741

if it too lean why there is no knock??

gunzo

iTrader: (2)

Dude, what boost are you running ??? stock Evo VII runs typically in the 240 load band and tapers to 200 at 7000rpms .. seems like you're probably boosting 1.7-1.8bar

It doesn't really help if you don't post other supporting info .. like what are the mods done to the car ..

Your initial post rpm vs injector if you're on stock injectors indicated you ran out of injector duty cycle at high rpms .. if you're on stock pump, the pump cannot flow enough fuel to support the injectors at 100% ..

fbikawi

iTrader: (1)

my car mods are:

HKS cat back with decat pipe
K&N induction kit
MBC 1.3 Bar (Spike 1.45)

i have Walbro 255 pump but not installed. Do u recomend installing now?

what do u think about AFR 12:?? all the way top.

can u guide me how can i log or calculate the load accurately?

i am confused how can i start to tune the car as most people say u have to lean mixture a littel bit and add some advance but with 12:?? i think i shouldnt lean it more. i think i should add some fuel? what do u think

gunzo

iTrader: (2)

Maybe your load is calculated wrongly .. the USDM default is 513 whereas JDM are 542 injector scaling .. so that maybe your problem ..

The formula you have to use as load in the evoscan / mitsulogger is already there .. just change the injector size as above ..

Do install the walbro .. it's a cheap insurance ..and you may have other issues as well though .. since if everything is as above .. you should running around 10.1 - 9.9 AFR at the upper ranges ..

There's alot of other things .. fuel filter, regulator, clogged injectors etc .. that can affect the above .. basically you need to do the maintenance 1st before you think about tuning ..

burgers22

That right there is the most likey reason. I have a JDM Evo VII, and the stock map is pretty rich, well below 10-1 above 6500. If you have the stock intake, refit it, you really don't gain anything worth while with an aftermarket job. Either that or you will have to change your MAF scaling.

MB

JoeBee

I’m not sure if the injector duty is calculated correctly for EVO 7.
Mine shows although over 100% when I was at WOT and 1.5 bar (21.75 psi) boost.
Maybe in the future I will check this with a measure of the real injector puls length and duty cycle.

gunzo

iTrader: (2)

injector duty cycle is simple calculation.. rpm*ipw/1200

I've logged the stock injectors to 102% before.. though you may not be really running beyond 100%.. probably the injectors went static before that.. meaning you're not getting any more fuel when you approach the limits of the injectors

JoeBee

I mean the calculation of the duty cycle the loggers do.
The formula for example in mitsulogger is 0.256*x where x is the RAW data byte that the ECU sends.
Maybe this 0.256 is wrong for our EVO 7 ?

fbikawi

iTrader: (1)

gunzo

i am using 542 as injector scaling in the load calculations.

i will install the Walbro and change the fule filter and recalibrate the sensor. i will let u know

but the car is not showing any lack of power.

and the knock counts is minimal.

i dont really know why the AFR is that low. attached is the min AFR log using Log Works.

fbikawi

iTrader: (1)

and this is the Max log for the same run above

jfitzpat

I think load is wrong for your VE. I did a post on adding AFRMAP and the Mitsulogger calculation here:

http://www.innovatemotorsports.com/f...&postcount=110

Still, from your first two mods, I'd expect you to be running lean on a stock ROM.

-jjf

nj1266

iTrader: (6)

It seems to me that you have tweo options:

1. Ditch the aftermarket intake and go back to your stock filter. Why run an intake with such minimal mods? The stock intake on the Evo is very good up to 400 whp. The MAF on the Evo is very sensitive to turbulence and that might be the cause of your lean/erratic AFR numbers. Get rid of it and see what happens.

2. Keep the intake and tune around it. Your knock is in 6000-7000 range and 220-240 load. You can either richen up that part of the map or pull timing. Since you are running lean, I would just make the map about 0.3-0.5 afr richer and see what happens to the knock.

gunzo

iTrader: (2)

He should not be running lean at all .. JDM evos come from factory running very rich .. even with exhaust and intake mods .. you'd be running around 10.5- 10.1 AFR ..

there may be something else that's affecting the AFR .. the last time I saw such a problem was a bad fuel regulator ..
Here's some

fbikawi

iTrader: (1)

PROBLEM SOLVED Thanks to all advice.

Yesterday i went to workshop, and did the following:

- Walbro fule pump was installed.
- new spark plugs (HKS irdium) grade 8
- i found MAF not properly clamped to sucction pipes (there was a lose clamp)
- Free Air re-calibration of LC1 wide band O2 sensor.

i logged the car for 20 min after and the results are attached.

the file attached is Average AFR.

jjf,
i am sure that the loadCalc still not correctly calculated although i used the same formula. i will check your posts in the innovate forum