Join Date: May 2008
Location: Grand Rapids, MI
Coolant System Pressure
For those of us who have the option, what coolant system cap pressure is ideal for the 2zz engine? BOE's swirl tank comes with a 30 psi. KISS and stick with that?
My particular setup includes: Laminova coolers for both oil and trans fluid, Wizard Cooling radiator located in the rear, all silicone 1 1/4" hoses (rated for 50 psi operating) and reinforced rubber hoses (rated for 300 psi operating) for the smaller diameter stuff, aluminum joiners, and constant torque hose clamps. My motor outputs somewhere above 200 WHP. Could be as high as 250 but I'm just guessing without a dyno. I run DI water with surfactant.
Rephrased, for a lower power application such as mine, is there any advantage or benefit of running a higher relief pressure than 30 psi?
I'd like to hear the community's thoughts.
Thanks in advance.
06' Fed Elise
My frame, rear subframe, steering rack, A-arms, front crash structure, suspension uprights, and fuel tank are stock.
Last edited by jasondew; 05-31-2015 at 04:46 AM.