Cooler intake manifold

I think in terms of operating temp. If you can keep the intake @ 180*’s, it’ll be fine. I don’t know what kind of changes 20*’s brings around in ether direction for YOUR build but I do know what it does on MY BUILD.

On my next build, it very well will be different. A lot of this depends on what your asking of the engine and car to do. For anybody wondering, this is really a trail and error thing. The dyno helps in much but on actual driving conditions, I’m sure it’ll change.

I’ve noticed for myself, driving with a thermostat lower than 180*’s doesn’t always make for the happy engine in driver conditions. 180-195 (180* thermostat) is where I find the best temps on an engine/car that is to be driving around town, traffic, Hwy. etc…. That also use defrost &/or heat.

I use the 160* stat in the heavier hitting engines.