I just wanted to say thanks for the info in this thread. I know it's old but it really helped me out. I bought the toyosports kit which has a tiny intercooler 420mmx160mmx65mm but also has all the more valuable pipework for the PD130 that I needed.
I'm going to stick with this for a while and maybe move up to the medium sized 550mmx220mm wellycooler one day.
Figures: Running at @1.7mbar boost
Uprated side mount intercooler ambient temp 11ºc hard run hitting 60ºc plus (ran out of road) took ages to cool down settling at 21ºc
FMIC 15ºc ambient temp hard runs hitting 40ºc cooling quickly to just above ambient. Then 22ºc ambient temp last little heat wave I hit 50ºc but this was really battering it for a long time. Cooled quickly to a few degrees above ambient again.
Not sure how much of a difference petrol and diesel cars are regarding intake temps but I thought I'd share anyway.