confessed owner of a 180 high flow
On a bone stock engine, listen to these guys.
But, um.... resident crazy person. unwrapped headers and passive electric cooling fans stuck in August traffic. Open cowl to engine and blower fan. No ac. 5 spd. Parkway on greentree hill inbound. Coveralls.
You'll thank yourself when you put the big ass low temp thermostat in. Combined with small single core (there's method to this) rad, makes for fast thermal cycling, and fans come on enough to keep the stank blown off er. makes for a slightly less tortuous ride
So, has purposes elsewhere if nothing else. The 12° makes a difference
If i could have found a 190 high flow, probably would have gone with it.
Sort of a poor man's workaround to a bigger rad; if you want to cool it easier, pump water faster. Just make sure your fans can handle it.
And if you want to keep your motor really cool. like. Fonz level cool, spray washer fluid in your intake at WOT. hot summer night on tuning run with driver, your upper will have condensation on it when you check on things up front.
Proven science. BMW M4 comes with it from the factory now.