Magnum cooling
@Evan Dutch I wouldn’t run any engine with boost on pump gas above 170 degrees. You’ll fight detonation like crazy. 160 would be even better. If you have a 160 stat and it’s running at 200 on a 70 degree day then what you’re seeing is the top of the efficiency range of your cooling system. You need more cooling system. More air, more water, or both. Testing will help decide which is lacking.
I’m repositioning this because it’s so CRITICAL it can’t be ignored.
You aren’t running a NA 9:1 turd. You have BOOST.
You absolutely MUST get the coolant temperature DOWN or get rid of the boost.
This is no different than running 12:1 on pump gas. You can’t do it and make power but a hot engine will detonate itself to death so fast your wallet will cry.
That’s why BEFORE I buy anything or develop a plan on how to cool it.
If you can’t get the cooling system to maintain engine temperature at or SLIGHTLY above thermostat opening then drop the compression or get rid of the boost.
At your temperatures you’ll need to lower the boost, pull more timing, add an octane booster like Torco Accelerator, use race gas or a combination of the above.
Whatever you do, do NOT go out and flat foot the engine with ANY boost.
I’m assuming you have a boost retard capable ignition.
If not you better get one.