Over the weekend I managed to fit an outside temp sensor to the backing plate on the TB's
The results, I find interesting but as expected. When driving normally and giving it some the temp remains the same, which is about 9 degs above ambient, but if you leave it for more than 5 - 10 minutes the temps can go as high as 28 degs above ambient.
Driving slowly I've noticed also increase the induction temp slow but as soon as your travelling again the temps soon drop.
Not tried any ducting as of yet, but hopefully it'll make it better.
TBH the thought the normal induction temps would be a lot higher than 9 degs above.