WMI is to be used for combustion efficiency, on its own merits there is very very little gains to be had.
With all petrol turbo cars the onset of knock/pre combustion/det/pinking it a limiting factor for power, the knock limits the amount of timing and boost with limits
potential power.
With the 1.8T k03s engine I am setting and tuning the WMI to spray on to the ait intake temps sensor which lowers the air temp reading the ecu is seeing, the ecu uses a map called
"Delta Zündwinkel im Warmlauf" this map is a timing correction factor based on air temp vs rpm. With the WMI active the air temp reading can drop from 30-40deg to 8-10deg with in a split second under full load. We can use the lower temp reading on the correction map to add more ignition advance around 8-10deg (temp) in most cases upto 7deg more timing which works out to be an avg of 25lbft and 15bhp just on a small K03s 1.8T.
I have found 100% to give best power gains but not done any testing on how safe it is??
I have only tuned one TFSI BWA K04 with WMI and pushed the balls off it with timing making around 390-403bhp avg on the dyno and max correction at the extream is -5cf, without the WMI I would be seeing -12cf+ and at a point where the ecu map is pulling the boost away to save the engine and maybe only 360-370bhp tops.
If your not going to push your TFSI hard then IMO its not worth going for WMI as the TFSI engine in design works well to suppress pre combustion.
If your running stage2+ and have the ability to dial timing in via an SPS switch then the WMI system is a good investement for you imo.
I am sure over the next few months there will be more TFSI customers coming in for map with WMI which means I can collect data and come up with remap ideas like the methods used on the 1.8T engine I tune.
Nice story....
on my own sprint car Golf AUM with home made hybrid turbo to 300bhp then NOS to take it to a little under 400bhp, to get the car to make good power top end I had to fully remove the knock control intervention from the ecu map (running without knock sensor) I had to tune my map live using det cans and head phones to listen for the onset of knock, this was all done with the aid of devils own DV30 WMI kit.
My car would run 12.5s 1/4 at pod and would run with zero knock and 100% safe............... until my WMI controller failed as Santa Pod and ended up with melted pistion, valves and spark on cylinder number 3. But this was running the bollox of my engine with stock manifold to prove a point, the WMI can work miracles when working correct.......
Racing my wife and as I go over the line in 3rd gear around 7800rpm my engine melts..
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