Originally Posted by Sh0velMan

Yeah, i knew what you meant, was just offering a cheap solution that would actually datalog.

There are others sold by that same person that have multiple channels and don't really cost a lot more.

That's what I would do, get a 3 or 4 channel one and run those bitches all over my engine bay, then you can build an accurate model of before and after the hood.

Just use the car's reported ambient temp, subtract the ambient from whatever the under hood readings are and you'll have a (sloppily) normalized measure to compare before and after.