SL65amg

Its getting very hot down here in the south with high humidity and even with the cooling mods/upgrades I've done it still is getting very hot and my coolant light came on the other day when the outside got up to 98 degrees....I have the eurocharged HE and the Johnson IC pump and water wetter and phenolic spacers, Kleemann Cams & Headers, Eurocharged TB, Shardul belt wrap kit w/180mm pulley, ASP pulleys, Quaife LSD, 2nd cat delete, closed loop fuel rails, Eurocharged fuel injectors, mishimoto catch can, K&N filters, etc.....trunk ice tank is being built for me which is supposed to help a lot and I'll need it especially for later on when I wanna upgrade again to a 200mm pulley and port the supercharger (which I've been told I'll definitely need first forged pistons/connecting rods/upgraded billet transmission before I do all that due to the fact that these upgrades will significantly increase my horsepower and torque but also the heat too)....so basically for right now I need to know what is the absolute best coolant to put in at least until the trunk ice tank gets installed.....thanks guys.....also still wondering where to find the upgraded brake caliper brackets so that I can upgrade my rotors from the factory 360mm fronts to 415mm rotors now that I installed the 20 inch Vossen CV3's...would like to upgrade the rear rotors also but not sure if I will need wider caliper brackets and if so where do I buy them?

boostd

I'd just wait for the trunk tank. That shouldn't take that long to build. You can even get it immediately from Shardul.

SL65amg

and also just in case I went on Amazon and bought a half gallon of high performance engine ice coolant to add to my coolant reservoir, just thought it couldn't hurt to add it ...never used it before but read good things about it...if any of you guys have used it please do tell how well it worked.... thanks again...

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Nor Cal SL55

I've used the Mercedes Benz blue coolant - Mercedes Q1030004

No issues...

carguyshu

you get the best cooling with no coolant at all, just water. The problem is that water boils at a lower point, that it can freeze, and that it has no anti corrosive additives like coolant does.

I'd be weary of adding any additives to the cooling system and I think you might be too if you read these two publications

http://www.2phast.com/500e/techdocs/...ze_article.pdf

https://www.mbwholesaleparts.com/dow...antifreeze.pdf