Originally Posted by SSsuperchargedEi
i thought t-stats were only truely effective if you're PCM'd...?
Not totally true. If your cooling system is 100% and you run a 195 at 40+ mph you should run about 198-200 in warm weather. With a 180 same conditions you should run 183-187ish.
But... now put that on an SC engine. SC'* building up so much heat when you work them..if you wot for a moment you can jump 10 degrees for a few moments. If you jump from 183, you hit 195ish? And likewise from 200ish.
Add to that traffic etc. and the cooler stat will keep you cooler for a while until temps build and fans kick on. Here'* where the pcm programmed to turn on fans lower comes in nicely.