350Z bin file

[Tom]

Can anyone identify maps, scales or any specific settings in this 350Z CD405 bin file?
[attachment=0]350Z CD405.bin[/attachment]

[jaf]

Downloaded. Let's see if it's layout is anything like an X-Trail. Will report back soon.

John

Yep... I see plenty of identifiable maps. Will take me a while to post the data in a usable form. What are you after in particular?
I can give you the obvious ones like Target AFR tables, Low det timing advance maps, VVT maps, Fuel Compensation map without too much trouble as these follow the same layout as the X-Trail ROM. Unfortunately not things like rev limiter.

[Tom]

I think I can see some of them as well. I'm just not sure which one is which and where the x and y scales are.
Can you make sense of the timing tables? They don't seem to be in deg BTDC.

PM me regarding flashing if you are still interested.

[jaf]

O.K, here is what I can pick out easily.
If you need help orientating the maps with the right axis or how they convert to real world units, let me know.

Note: All 16 bit data "big endian"

Address Data Size Map

6849 8bit 16x16 Ign Low Det Add Timing
6949 8bit 16x16 Ign Low Det Add Timing
6C09 8bit 16x16 Fuel Compensation
6E19 8bit 8x8 Target AFR
6F99 8bit 16x16 Cam Advance
7DF4 16bit 16x16 Electronic Throttle

6749 8bit 16x16 Unknown. Cold Add Advance or Hi Det Retard?
7574 16bit 16x16 Unknown. Base Ign Timing likely
7774 same as above
9C88 same as above
9E88 same as above
7974 16bit 16x16 Unknown. Throttle related? Maybe Cruise control maps
0A088 same as above
07B74 16bit 16x16 Unknown. Possible Throttle limp mode
6B89 8bit 8x8 Unknown.
6BC9 same as above
6D19 8bit 8x8 Unknown.
6E99 8bit 8x8 Unknown but has big impact on fuel
6ED9 8bit 8x8 Unknown but has big impact on fuel
Loads of axis scales are in the 8000-9000 address ranges.

I can see 20-30kW hiding in there already....Is this a personal project?

Regards,

John

[Tom]

Thanks for that. I'll make definition file for EcuFlash software so I can easily see the maps.

Yes, its for personal project. My 350gt has very similar maps but it's tuned for high octane Japanese fuel which I can not get in Australia.

[jaf]

I find WinOLS Demo is better for visualising the maps and editing.
Ahh! That explains the crazy Ign advance figures down low.

[Tom]

I can't get use to WinOLS. It feels complex to me.

The timing maps look strange to me too. I think they are in some units of time rather than deg BTDC. That's why they look so flat.

Would the red region be the knock portion for the map?
[attachment=2]CD405 Timing2.jpg[/attachment]
[attachment=1]CD405 Timing3.jpg[/attachment]

The map at 0x6749 also looks like a timing map but without the knock.
[attachment=0]CD405 Timing1.jpg[/attachment]

[jaf]

[attachment=0]ign timing.jpg[/attachment]Values greater than 128 designate areas that the knock sensor is set to be more aggressive. Best to set up a spreadsheet and deduct 128 from all the high values. You will then have a map that represents an addition to the base timing (which there is no direct map for). Changing a value by 1 will equate to around 0.5 degree - up is more advance, down is less advance.
Unfortunately there are about three layers of maps that add or subtract from each other so it is a little confusing as to what is doing what.
The flat map is likely to be the cold add advance map, the other 2 look like low knock advance and high knock advance. My guess is the map with the highest numbers is the low knock advance map.
If you compare a light / medium / high load logging run to the map, peaks and troughs in the timing should match up to the map fairly obviously and give you an idea of the scales.
There are a few US timing maps for VQ35 engines floating around on the internet which may be handy for comparison.
Your RPM axis may not be exactly right - some maps have 400-600-800 or similar as the starting rows.

John

[Tom]

I can see that example map is in "Time for cylinder Max pressure". I wonder how hard it would be to convert to deg BTDC.

[jaf]

I spent hours / days trying to do just that as have many others. It takes a while to accept that you are beat and to just accept it is what it is (BTW it isn't time to max cyl pressure as Osiris reports). It's not too hard to push values up or down based on logging results and you will find the map ends up quite smoothed out with gentle curves.
If you can crack it, Legend status applies.