Re: [Amc-list] Howell TBI in a 63 Classic...

[Wrambler242@xxxxxxxxxxx]

Gee, that sounds so easy..
I've also seen a really cool project board kit.
It entails a pressure sensor mounted in front of the rad.
When you get to a certain wind speed it dissarms the fan circuit as it is no longer needed!
Being as I'm pretty much at a loss when it comes to electronics I never investigated to see how well or long it would work.
   I like the idea though.
Keep in mind if you want a mounting point for a senor the 4.0L's from 91 up have a bung in the tstat housing.
Only drawback is the neck is kind of restrictive and points the hose back slightly.
   They are pretty easy to port and polish up for better flow.
I once ported one an dpolished it all nice and clean, then figured out I had done the wrong one!
I picked up the one without the sensor bung in it! Duh....
--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrc II
" Chronic Pain Hurts"

 -------------- Original message ----------------------
From: Tom Jennings <tomj@xxxxxxx>
> re: fan thermostats
> 
> I think the "best" solution is a microprocessor that looks at the 
> factory temperature sensor and Does the Right Thing. I even wrote the 
> code for an Arduino ($39) board. Never got around to trying it out.
> 
> It could anticipate warmup, PWM speed control the fan, do 5 min cooldown 
> after turn off but only if hot enough, etc. Histerysis, proportional 
> speed, etc.
> 
> It even self-calibrates; the factory temp sensors are all over the place 
> so it's necessary. From a cold engine, you enter CALIBRATE mode with a 
> switch, then:
> 
> When temp reaches rated thermostat temp (you look at the guage, use a 
> thermometer, etc) you press the CAL switch. That's the low set point.
> 
> When temp reaches maximum desired operating (you again) press the switch 
> a second time. That's the hot setpoint.
> 
> It then proportionally controls the fan within that range.
> 
> Too many projects.
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