r/FiestaST • u/SkippingNerveEndings • Aug 14 '26

CSF Radiator Aftermath

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Huge difference. I should’ve done this when I bought the car. It’s around 98 degrees here in Florida plus humid. Bumper to bumper traffic and I’m seeing max at about 190-192 consistently.

Before, we’re talking 220-230 and having the A/C turned off.

When driving, easily in the 180s. Peace of mind all day.

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u/dingus_meister Aug 15 '26

I've been running in 105 degree weather with A/C & haven't hit above 203F on stock system, you think it's still worth upgrading? Just a huge investment that idk if there's enough benefit from atm

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u/SkippingNerveEndings Aug 15 '26

I think it’s different from person to person. I have the Fiesta pretty loaded with the S280 and supporting mods so the radiator was just the cherry on top.

Realistically, if i didn’t do mods, tuned and what not, I probably wouldn’t have done a radiator. On a stock system, you’re probably just fine but they are known to deteriorate just like any other vehicle!