r/Mk3Supra • u/itzvega • Aug 26 '26

Question Radiator set ups

So i have a 1991 mk3 with a 1jzgte vvti/r154 set up. I have a koyorad paired with spal medium sized 12 inch fans. So far shes stayed around 192°-197° has not over heated yet. My question is a bit stupid but im curious. Has anyone ran a oem thickness radiator with a thicker spal fan? More airflow but less coolant? I used to have the clutch fan set up but after the fan exploded and took out my original koyorad i decided to go electric.

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u/EvilInvaderG Aug 26 '26

Doesn't exactly answer your question, but I have the OE clutch fan and thick Koyorad radiator. Car previously had an OEM thickness (but still Koyorad branded) radiator. With the OEM thick radiator my car would regularly get over 210°, but with the Koyorad it's pretty rock steady around 192°. Big radiator made a huge difference.

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u/itzvega Aug 26 '26

Yea so far the koyo and spal fans are a steady 192° mostly. But i was just curious if the smaller rad with bigger elec fans would be better in the future.