I just did the 2byte load and was wondering if you can take a look at my log let me know what you think. Is it about right for 23 psi? This is on 93 octane I am getting 0 knock can the timing be more agressive? AFR is around 12 and high 11's in upper RPM just can't log it. I'm just getting ideas I am not going to really make any changes until I feel comfortable.

Thanks

 

Back off the timing in the peak torque area, where you got the 1 count of knock, 1 or 2 degrees. You can slowly add timing in the upper RPM range just do it 1 degree at a time. Your load seems about right for 23psi. I am running 24psi on stock turbo and that is the load area I am in.

 

I am not making changes now as I am not comfortable with ECUFlash. I am confused when it comes to what cells to actually modify... Would the 2byte load indicate the cells at the specific RPM the ECU is reading from. How would I find the actual cells to change? I'm trying to learn this stuff.

Thanks

 

You got it man. 2 byte load is what the ecu goes off of. So you would look at the 2 byte and rpm and change the values in that cell area

 

Sounds good. Finally I am getting somewhere in the mysterious world of ECU Flashing.

 

Hit Man,

1. It seems to me that your LoadCalc is way low. Maybe IX is different than my VIII, but I don't think so.
2. You are at 23psi, but the 2-byte shows 26.5psi. See attached.
3. The knock between 3,500 and 3,800 is minimal, and you are only at 5-6psi at that range. I would not worry about it.
4. FWIW, I always start my logging at much lower RPM - like 1,500.

Jim

 

How do you figure the PSI?!?! I have also read that the load does not really = boost since it comes from a few different sensors. Well I see your formula... but does load really = boost?

 

^^ that is correct. Higher Load from what I understand means more airflow. But there is no true load to boost comparison for the simple reason that 250 Load at 3500rpm can mean a different amount of boost than 250 Load at 6000rpm.

 

I would actually like to see a log started lower and pulled to redline as well. It looks like it could be making more power but with a mid pull like that Data Log Lab might be getting thrown off and I know it's got more up top. Load Calc looks off by a large amount. What do your fuel trims look like? What does your AFR look like at 5000 rpm?

As far as more aggressive timing, I wouldnt. It already looks a little high at peak torque but you dont have knock.

 

Hit Man,

LoadCalc is indeed not accurate, however, your 2-byte load is supposed to be pretty close. Substitute the "100" in the formula with your local ATMO pressure in kPa to make it even more accurate.

Here is the thread on PSI to load.

Jim

 

But if you notice the load cal is fairly similar to the 2 byte until it is pegged at 159. You are correct LoadCal is off.

Sorry I meant Max Load.

 

another log. slightly less boost. Added what I believe to be the correct formula for Inj Duty Cycle.

 

Your low rpm load seems low or your car just spools really really slow, I start my logs at 2500 rpm as well. But you are running more timing at spool than I get away with so maybe this has to do with your low load/boost in that area. I am running 5 deg at spool up 3300-3500 where I am at around 280 load but high rpm we are similar I usually am around high 220s at high rpm but I run my logs out to 7300-7500 rpm's

 

in his sig it reckons 35r so maybe thats why it looks like it spools late which it does.
but if you have a look at his 2 bytye you will see he maintains 280 all the way to redline.

 

I missed the 35R thing,that would explain the low load, well I have no experience with those logs than, I have dealt with IX turbo quite a bit, wow, looks very laggy on a log compared with a IX turbo and a good tune.