What pressure, front/rear are people using for their track cars?

I think mine might need a tweak after experiencing massive amounts of body roll at Bedford on Friday.

Has anyone relocated their ECU to the passenger footwell?

Did you have to extend any wiring? Any pictures advice welcome.

I have heard that the R115 Diesel radiator is a good upgrade if running VVC and doing track days.

Can anyone tell me what the difference is between that and a standard rad? The dimensions look the same.

Thanks