Cylinder Head Temp question.

[Eritas]

Well I'd argue that you're at the stable point if you've gone into the cyclic on-off of the fans. My example was applicable mainly to highway, as it's keeping variables constant or of very minimal change (let's assume constant speed and relatively flat ground...load will be constant, as will airflow, so heat rejection to the coolant will stabilize). The fan won't be on then either.

You said +/- a couple degrees. Dr. Norts says the gap between the thermostat is open and fans come on is 15-16*. That's 15-16* constantly varying as "stable".

I'm sure turning the fans on earlier on a stock thermostat will also bring the avg temp and stabilized temp down for most normal/easy driving, autoX and drag race staging, etc... A lower stat on top of that will further bring it down under those conditions.

So cruising on the HWY at 180* instead of 190* (assuming 180* isn't too cold to hurt power), you'll potentially be able to make more power on a hwy pull until the temps climb to 190* where the stock statement would have you at anyway.

Still seems mostly pointless unless you're trying to really stretch your tune for hey, drag, and autoX races.

I'd like to see some dynos of varying CHTs

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[Dub347sbf]

This is reminding me of the LMS vs Reische discussions with going to a 160 with a tune on the 3.5 ecoboosts, and all of the arguing which is better stock, 170, or 160. I still wish i knew the answer to that question, from what i see most people say 170 is a good compromise with a tune, and 160 could potentially lead to shorter engine part life due to not ever warming up enough... but idk. Wish i did though, about to tune my 2013 ecoboost f150

 

[Eritas]

This reminds me of the "vertical link" argument. Claimed benefits with no substantiated proof in order to generate sales to make money. Show me proof because I wont "take your word for it" or accept hearsay.

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