That was an early version of the port. Here is the latest for the 88590015:

http://se30.dyndns.org:8080/EVO/8859..._JCSBSD3M2.zip

And here is the latest for the 94170015:

http://se30.dyndns.org:8080/EVO/9417..._JCSBSD3M3.zip

 

Started a new thread with links to all the patches:

https://www.evolutionm.net/forums/ec...ml#post6744334

 

This is great thanks for all your help I will try it as soon as I can. Im on my phone right now and not near my computer so i will post up questions/ some results soon!

BTW my cams are Cosworth M3 cams, 1mm bigger valves in the head too.


Evan Smith

 

Alright, tried out a few different address to try and find the compensated 2-Byte load. I can't remember the address off the top of my head, but it's 1 word higher then the normal 2-Byte load, just like it is on some of the other ROMs (for 94170015 I think Raw is 895C/5D, Baro Comp is 8960/61, and Baro+IAT is 8962/63). Tephra's 1-Byte load is the Raw load.

I did some more logging and calcs using the compensated load. Below is a comparison of the VE based on Raw load and the VE based on compensated load. L2r99GST, I think this explains why I was seeing VE of 100% on DSMLink fakeMAF that I mentioned in some of the other threads on here. Damn altitude guys...

VE BASED ON RAW LOAD


VE BASED ON COMPENSATED LOAD


Once I get the GM IAT sensor hooked up, I think I'll go get some RPM and LOAD sweeps. This was just a log of driving home while trying to hit a lot of different load sites. I was logging 4 different load channels too so the sample rate wasn't that great.

 

Ah, MR Turco, just realised I'd scroll the logworks .dif so you can't see the top line. If you load up a sample logworks log and save it or export it (can't remember which) as a .dif you can copy the line. From here I can't recall what I had on the top line.

03white, that is looking more like it. You'll want a bit of idle as well in your further logging.

 

Its "Input Description" in case anyone else wants to know. Thanks again JCB

 

JCSBanks, my car idles at 1000 RPM and 30kPa. With that in mind, is that log sufficient for idle?

 

what load are you logging?

 

Baro Compensated

Just checked my MUT table to verify and for 94170015 the address for 2-Byte baro compensated load is 9860/9861.

 

Anyone have that for 88590015? God i wish i knew how to disassemble this stuff.

 

For SD, its best to log baro+air temp compensated load.

MUT00 = 0x6B48
MUT01 = 0x6B49

 

Wonderful, i will log that, baro and airflow on the way home. is it still evaluated as 0.3125*x like 2byte?

 

Using Baro+IAT Compensated load produces a map with much more stable VE values. Mater of fact, with relation to MAP my VE using Baro-IAT compensated load is 0.85 across MAP values between 10kPa and150kPa. I do get some MAP based drop off at higher MAP values, as it drops to 0.81 by 210kPa.
MAP VE
10kPa to 150kPa - 0.85
160kPa - 0.84
170kPa - 0.84
180kPa - 0.84
190kPa - 0.83
200kPa - 0.82
210kPa - 0.81


RPM VE:
0 - 0.80
500 - 0.95
1000 - 0.98
2000 - 0.99
3000 - 0.99
4000 - 1.00
5000 - 1.00
6000 - 0.98
7000 - 0.88
8000 - 0.80

I'd turn up the boost, but I have a stock cat on the car still and the clutch slips anyway. I think I'll do some WOT runs with the boost turned down to wastegate pressure then step it back up in small increments to where it is now.

 

Yes. I think my description needs a little revision. It is a 2-byte load. Its been compensated by barometric pressure and air temperature.

 

I wouldn't worry about temp compensation when calculating VE, unless you want to temperature compensate the MAP value with MAT in your calcs - which will make it more complex. Baro comp is useful for high RPM or high altitude, but mine was OK without, the VE estimates are just a guide and may need fine tuning on the car.

Since our weather has warmed up more, engine is still running great. I have some knock counts at 7000 RPM that are up to 5 or 6 higher than before. I will fix this by rolling off the high RPM VE slightly less as I did maybe leave it slightly more advanced and leaner than when on the MAF, plus I've changed the type of fuel I use since it was last this warm (from V-power to Tesco 99 which contains a little ethanol). I will try rolling off the top end VE by 2%/500 RPM from 5500 RPM upwards, rather than 3%, will end up about 11.2:1 at 7000 RPM rather than 11.5, and 1 degree less timing.

03white, didn't realise your idle vac and RPM, that is fine. Looks like your baro compensated VE is 85% to 100% on the log you posted, but your latest log sounds different. You look to be on the right lines on your RPM and MAP VE suggestions, I would maybe not roll it off at 0 and 8000 RPM quite so much though.

Also we don't need to worry too much about odd values on over-run, injectors are cut anyway based on TPS. Also, many lift off events in logs don't have time concurrent MAP and load values, so the situation has changed in between the log samples.