Quote:
Originally Posted by Jonny042
I'm here to offer the opinion that you are better off getting the CHT to work. This is based on the potentially faulty notion that the 3.2 motronic used CHT, not oil temp.
I liked your solution but remember thinking it wasn't going to work but keeping my (possibly wrong) opinion to myself. Mostly because you'd already done a pretty excellent job with this and had it wrapped:
I don't know that you'll get the heat effect you need, by clamping onto the cooling fins, which might already be cool, plus there's a bunch of cooling air being blown right at the sensor and mount..... but adding some heat transfer compound might help the situation. Relocating it to a hotter spot might help.
Next, maybe a bit of tweaking of the correction tables or map or whatever is supposed to happen as the sensor heats up is in order? I mean, as long as you are getting some sort of signal out of the CHT you should be able to work with it? |
I looked at that picture and thought, "Dang, that looks really nice." About 2 minutes later, I went back and looked again and THEN realized it's my picture of my work. LOL
I can rework the tune to account for the lower temps shown at this point. I can also move the sensor and I have some thermal paste from some work laptop service a while back.
But it does swing pretty quickly when the car idles vs on the move. So I know the cooling fins are cooling.
I also considered building a small air dam around the CHT pickup point. My concern is that this may make a hot spot that actually puts the engine at risk.
Quote:
Originally Posted by Jonny042
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I looked at these before I settled on the 993 CHT setup. I couldn't find a suitable place to mount it, so I passed. I'm not keen to make spark plug changes any more complicated than they already are, so it'd have to go on the engine somewhere.