Quote Originally Posted by Pure2sin View Post
I think there are a lot of blanket statements in that article. Plus that is one article saying one thing. I can tell you if I write a report on a subject I will have more than one source to back up my points. I personally think depending on the mods you can benefit from a colder thermostat. If this wasn't the case I would be running a 195 and some stock plugs.
The article is a good read, but unfortunately it doesn't cover roots blower engines, which are nothing like N/A motors.

Too many people go straight to a colder tstat and colder plugs... but the reality is they aren't needed. Personally I run a 180 tstat, not drilled... I think that drilling the tstat is not smart. I do this because the supercharger makes A LOT of heat. Much more heat than an N/A motor. Air is going in 200-250 degrees above ambient temps.

My coolant stays at 180 degrees for the most part in normal driving, but after a few pulls it shoots up to over 200. By using the 180 I feel like the coolant drains the KR creating heat out of our motors a little better.

Going to a 160 is too cold. At those levels your engine oil may not reach proper temps and you could start to sludge it up... And a drilled 160 is a terrible idea.

If you get on it a lot go with a 180, if you drive normal, stick with the stock one.