During tuning runs I have had my car with the listed setups up to 120+, 130 on the track...two days ago I made a run to 120 without the stock lip under the bumper and it was a bit unstable but not too bad, I have made runs to that speed with it on and it was much better. With just a splitter it was some time ago and do not recall any improvements.
With the TR splitter modified to have a full undertray there is a remarkable difference in stability at speed and rowing up through the gears it is just more planted, less darting around when going over groves in the road or when boost kicks in hard, once into third gear that is but even second feels a bit better and seems to hook up more(EFR turbo tuning, not full power yet but around 260 right no, have had it to 280)
I am going to design an aluminum extension to mount to the bottom and extend it out 2-3" for track days.
With the TR splitter modified to have a full undertray there is a remarkable difference in stability at speed and rowing up through the gears it is just more planted, less darting around when going over groves in the road or when boost kicks in hard, once into third gear that is but even second feels a bit better and seems to hook up more(EFR turbo tuning, not full power yet but around 260 right no, have had it to 280)
I am going to design an aluminum extension to mount to the bottom and extend it out 2-3" for track days.