Rob can you post up the temps at which the fans turn on/off again?
1998 Legnum VR4
Facelift, Trigger Mauve, 5sp Auto, Momo, Recaro's, Lowered, Brembos, Rays Gram Lights 57Fs, Exhaust, IC Hard Piping
On at 91, off 89/88deg using coolant temp scaled. Well that is the stationary temps I was seeing. Steve gave me some thermo fan control tables from the Magna's, and they were speed dependent as well.
I got some addresses for BDEL and WDGC but now I'm wondering if they are correct at all. BDEL A B C D are different, all of them however haver 0 for last 2 values 7000rpm-> What should the tables look like. D goes highest and the biggest value is 119 versus evo6 has 159 in every BDEL value. WDGC seems quite good, it has all the values bigger then zero and the first values seem to be around 70 % and then it gets a little smaller. WDGC A and B are the same. Is this correct? I have already seen that different ROMs have different addresses, mine is EM2428/2381003
I'll have a look on an EM2428 ROM for you, they could be different on them, the scales are all moved usually
I have a copy of the same rom - I've PMd you the addresses you are after
Thanks. Those RPM addresses seem correct now, BDEL and WGDC addresses itself are now what I'm after. Is there really 4 x WGDC? I was only aware of 4x BDEL and 2x WGDC
By the way, does anyone have a PFL automatic. It would be interesting to see what values does PFL automatic have for BDEL and WGDC, if it's supposed to develop only 260 bhp ? The boost levels must generally be same for automatic and manual so C and D BDEL must be temperature related somehow.
The disassembly appears to have laid them out the same as the fuel and ignition tables, 2 low octane and 2 high octane maps.
A and B are full of 0.0, which would be 0 duty cycle on the boost solenoid, the high octane contain the maximum values which makes sense as you would expect that in loss of octane, the ecu would eventually put you down to wastegate pressure only.
If indeed the 2 maps are temperature related, it might just be that way for every dual map in the ECU (fuel, ignition etc). I'll get a final answer at some point when I unravel the assembler.
Kenneth,
I have no doubt there is some temp correction there, but it is not interpolating between C & D depending on Temp. I copied the D map to C to see if there was interpollating, and there is not. I'm still only getting a % of WGDC D at the lower temps my car is running (as posted above). Therefore there is some other scaling going on here. If I can help with any specific logging let me know - would like to unravel this SOB :lol:
Sorry, I meant that I believe it is interpolating between high and low octane rather than temp.
Or to put it another way it only interpolates between A OR B and C OR D.
A and B are low octane maps, C and D are high octane maps. Or perhaps something else other than octane, I haven't worked it out that far to be honest... Assembler was a bit before my time so I am taking a while to get my head around what is actually happening
Makes Sense. What i've seen from logging my car running cool, is that the WGDC is coming in at a % of the D map, depending on coolant temp scaled. That is, at 72ºc, there seems to be about 70% WGDC, 77 about 80%, 80º gets about 90% (roughly) but once you hit 82ºC you get 100% WGDC. The curver of the map follows D constantly (with octane not budging off 100) and no knock, SO if that helps you decipher anything......
I'll post some plots of the data I have logged a little later tonight when I get my laptop fired up.
Here is the plot I was referring too. In particular (as most running was under 2000 rpm, therefore 100% WGDC on both C & D maps) you can see the slow increase in WGDC as temps slowly went up. Looking at the log (data):
Temp WGDC
72ºc = 70%
73ºc = 71%
76ºc = 74%
78ºc = 79.5%
79ºc = 85%
80ºc = 89.5%
81ºc = 95%
82ºc = 100%
WGDCvsTEMPSCALED.JPG
Has anyone found or is there a boost control OFFSET- kind of function for vr4. Evo's boost is mostly controlled by this (even stock evos have maxxed out WGDC and BDEL and the offset says how much boost is added to the sum)
No but I would appreciate it if anyone else found it and let us know
Copied WGDC D to WGDC B this morning, and still get correction as above. Will try copying to A for the drive home this afternoon, if its the same still, then it's not interpollating but correction via a temp scale that we dont know the address of.
changed all 4 tables to be same (100% to 2.5k then 70%) and exactly same plots as above so temp causes 0 interpolation. Above effect is due to another temp scale not yet discovered
I don't know about there being an offset like the evo's, bear in mind that these don't run boost like they do either but in my testing at maxxed out bdel even at 17psi there was no drop off in boost so I suspect there may not be another offset, and I never needed any more anyway....
I am starting to suspect there is a seperate offset table for dropping boost when cold, just like fuel enrichment.... Would still like to know WTF there are 4 tables though. Anyone got any suggestions how we can test if the A and B addresses are truly lo octane?
I'm wondering if the 4 tables are for gears. I'm starting to suspect table c is for gears 1 & 2 and table d is for 3, 4 & 5.
It's just a hunch based on how my car has been behaving.
Played with the WGDC & BDEL tables quite a bit in the last few days.
A & B seem to be limp mode settings.
both table D's seem to be normal running and both table C's seem to be where the engine map drops to if the BDEL level on the D table is breached.
Thats very intersting info there Paul - cheers!
That would make sense for the correlation between the two sets of maps
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