Hi Sean
I have heard and been wondering the same, would like to know the answer to this as well. Sorry I can't give you the answer at the moment, but when my SECs montior is in I will do a standard intercooler reading and as I plan to go for more power will be putting a Pro Alloy one in anyway so will do another reading . This will be on a standard lagre turbo car with a stage 3 (330) converstion.
Unless anyone has already done it?????
Cheers
Malc