I would love the air going into the plenum to be 2degrees but it isnt going to be.
Skid, not sure how I am doing mine now as I only read about this affect on sun nite while at work.
Basically with rough figures, inlet air 20degrees, out of turbo 120degrees, 70% efficient IC down to about approx 30 degrees, then the recirc sends this blast of hot air back into the inlet slowly increasing the inlet temps every time u let off the throttle.
I've learnt more stuff this weekend than I have for a few months (had time to sit down and read) and will post it up when I have time.
The bloke this info came from has been tuning rally and race cars for over 20yrs inc the R before and is well know worldwide b4 anyone doubts what I am saying.
Ta
Nad