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Old 05-30-2001, 04:02 PM   #1
christoph1371
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Member#: 1090
Join Date: Mar 2000
Location: CA
Post Way too HOT...heat minimization

ok ,here is what i am looking for: Ways to alleviate the heat from my turbo all the way to the exhaust.
This Thing Gets WAyyyy to HOT.
suggestions?
and no dumb stuff danny or joe!
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Old 05-30-2001, 08:59 PM   #2
Necromancer
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Join Date: Oct 1999
Location: Vancouver
Vehicle:
GC4 -> GGA -> GM6
Yeah, that's about right.

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Dumb enough for ya?

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Old 05-30-2001, 09:03 PM   #3
bobski
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Join Date: Oct 1999
Chapter/Region: BAIC
Location: Tracy/San Jose, CA
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2006 VF-39 WRX Wagon
OBP

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Killer set up Joe. Is that activated by the windshield spray switch?
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Old 05-30-2001, 10:41 PM   #4
Necromancer
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GC4 -> GGA -> GM6
Yeah, that's about right.

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Yep, it's plumbed off the rear wiper motor. I need to get off my lazy butt and do the write-up. The real gains will be had when I can find the time to rig up an automatic controller for it. Anybody know how to program PIC's???
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Old 05-30-2001, 11:05 PM   #5
kaminari
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Location: Hayward, CA, US
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Blue Ridge Pearl

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i think mrt sells some auto activation kit, but i'm guessing it'll be more expensive than coming up with something on your own.
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Old 05-30-2001, 11:42 PM   #6
Philip
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If you haven't read through it, I recommend these articles on water spray kits....
http://www.autospeed.com/A_0527/page1.html

Philip
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Old 05-31-2001, 09:08 AM   #7
christoph1371
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THANKS JOE. You are a real Pal. Anyway, I'd like to attempt this minor mod. Any chance of you holding a "Class" ooooo Yoda?
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Old 06-01-2001, 09:38 AM   #8
satrya
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2002 GDAA
797

Talking

> Necromancer wrote:
> Anybody know how to program PIC's???

1. Digital + analog approach
How about getting one old pc, with say, an intel 8080 or 8085 ($50?), a simple digital i/o board ($150?), and a simple thermometer kit ($10). Get the voltage reading from the thermocouple of the thermometer, connect it to the digital i/o, and write some assembly code to do the simple switching, and generate the output to the i/o, and to the switch to the spray. ^_^

2. Analog approach
Or, maybe get the voltage reading from the thermocouple, pass it through some analog voltage divider with adjustable resistance, say, a potentiometer (so you can tweak the threshold of the temperature/voltage activated switch), and then to the collector of a simple transistor. The base and emitter of the transistor is connected to the switchin circuit for the spray.

With the potentiometer you can adjust the amount of voltage from the thermocouple that will activate the spray switch.


Ok, so I'm leaving out a lot of deatils, but if I didn't I could've just attempted this on my own subie ^_^

Just my 2 cents


Erwin
1995 Red Impreza L Coupe
2002 Yellow Impreza WRX Sedan

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Old 06-01-2001, 09:50 AM   #9
Necromancer
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GC4 -> GGA -> GM6
Yeah, that's about right.

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Erwin -- Yupyupyup, that was along the lines of what I was thinking as well. Like the article Philip posted says, I don't agree with using boost detection as an activator for the water spray. Ideally it should come on when the difference between I/C temp and ambient exceeds a certain value. Also the operation should be pulsed, not continuous. All of this is really a job for a microcontroller.

And since I've been meaning to learn how to program PIC's for quite some years now ... and since I'm presently unemployed ... I guess now is a good time to learn.

Anyway, Chris, if you want to rig up the manual version I can hook you up with the plumbing. You're going to have to figure out where to put a switch and stuff for it. I think you should be able to use any aftermarket windshield washer pump tied into the extra connector for the wagon. Then you need to figure out where the other end of that wire comes out (probably near the steering column). Give me a call and we can meet up...
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