Is it possible that you have air trapped in the cooling system? Looks like the highest point is the thermostat housing. maybe needs a bleed screw to just to be purged the air out of the system?

Hello Guys ! i bought a new Big Radiator... im working for installation... but also with this the water neck look like a little bit higher than radiator ... i hope can make air in the circuit ... im also undecided if put a reservoir tank or not ?

I'm going to mention the obvious so i dont hope to insult anyone here. I see both radiator have the inlet and outlet on the same tank...I'm going to assume that these are both crossflow radiators otherwise water will follow the least path of resistance.

If you look carefully you can see the dividers in the tanks.

The beginning of round robin is reality. So, ultimate cool downs are a fantasy. Especially with my one man crew: me. I stage at a temp that my cooling system can deal with on that day. Some weekends it’s 110, others, 140.

OK, I know the coffee hasn't kicked in when my brain sees the post title and translates it as "7 sec car Radio"...

Hello , got is now hoses and new billet water neck filler .... is a little bit higher than the radiator ... i hope no more air inside.. expansion tank will be from water filler , i installed 25lb cap in the radiator and 19 lb cap on the filler

My junk runs mid to low 8s, I run a cheap summit brand one,i think it’s for a camaro or something. 3 core, mounted under the trunk floor, Taurus fan, meziere electric pump. Can cruise all day never gets over 170-180

Apples to oranges here. A new style engine w/ a turbo won't build nearly the amount of heat as the OP's engine will. I have several friends w/ GM LS powered turbo cars that are FAST and the cooling systems they use (like yours) make me jealous, lol.

This is 7.80 car ,with 350 of nitrous shot , in italy in the summer ... 95/100 f