Some NA-T questions
06-08-09, 07:08 PM
#26
...94% correct.
Thread Starter
That's the thing...if I'm going to do it I want the 2.1 series chip installed. Which means I would have to do the S4 TII ECU. Which means quite a bit of rewiring.
06-08-09, 08:47 PM
#27
Unfortunately, the S5 NA Rtek 2.0 doesn't have the ability to switch to MAP based timing like the S4 TII 2.1. It would certainly make it easier on you. But I can supply you with the stock S4 TII LOAD based timing maps, which you could use as a starting point.
This is the 2560-7168 RPM, 68-100% load range from the lead timing map, which is the area numbers are pulled from under boost. You can also see the small amount of timing I have pulled from the map to account for the boost I am running.
From the datalogging I have done, the timing under boost seems to usually fall very close to the highest load values in the base map. The timing adjustments that the ECU makes based on boost seem to be pretty minor. The only time (so far) that I've seen it really come into play is when I load up a tall gear and get into high boost below 3500 RPM. Under these conditions, I have seen 4-5* pulled from the base map, while all other times it seems to be limited to 1* or less.
I'll eventually copy down the entire lead and trailing maps, but for now, this is all I've needed.
This is the 2560-7168 RPM, 68-100% load range from the lead timing map, which is the area numbers are pulled from under boost. You can also see the small amount of timing I have pulled from the map to account for the boost I am running.
From the datalogging I have done, the timing under boost seems to usually fall very close to the highest load values in the base map. The timing adjustments that the ECU makes based on boost seem to be pretty minor. The only time (so far) that I've seen it really come into play is when I load up a tall gear and get into high boost below 3500 RPM. Under these conditions, I have seen 4-5* pulled from the base map, while all other times it seems to be limited to 1* or less.
I'll eventually copy down the entire lead and trailing maps, but for now, this is all I've needed.
06-10-09, 12:30 AM
#29
Hate to highjack the thread but i have a simple question. Im going S4 NA-T soon and i heard if you use a S4 T2 ECU it will have timing maps that are a mixture of safe and aggressive. Can i plug in the S4 T2 ECU with T2 injectors and a safc and be ok. Besides the a/f and fuel pump do i need the S4 T2 throttle body and MAF since its a different ecu?
06-10-09, 01:42 PM
#30
Hate to highjack the thread but i have a simple question. Im going S4 NA-T soon and i heard if you use a S4 T2 ECU it will have timing maps that are a mixture of safe and aggressive. Can i plug in the S4 T2 ECU with T2 injectors and a safc and be ok. Besides the a/f and fuel pump do i need the S4 T2 throttle body and MAF since its a different ecu?
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