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Old 01-08-2008, 03:41 PM   #1
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Default Cost effective reed/floats?

So I'm probably picking up a couple pumps/solenoids/nozzles locally. With this, I'll still need to do all the electronics, containers, filters, routing etc...

I'm most likely going to emulate Joe's dual tank setup. It just seems ideal for an on track environment.

I found these float switches... http://cgi.ebay.com/Internal-Horizon...sid=p1638.m122 and am very tempted... anywhere I can cut costs makes me happier on doing this additional project. Since I already have enough little things to keep me going until the end of time. And I've gotten lazy.

Can anyone think of any reason why they wouldn't be worth trying?
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Old 01-08-2008, 03:46 PM   #2
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12 dollar vertical ones (and they are local)

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Old 01-08-2008, 03:53 PM   #3
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Hurm, maybe i need to figure out my containers and start figuring it out more from there.
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Old 01-08-2008, 03:54 PM   #4
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Or go to their site search floats, and then page through for horizontal
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Old 01-08-2008, 03:54 PM   #5
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Dude we have McMaster, no buying crap with 10 dollar shipping cost. Local pickup, 1 hour notice
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Old 01-08-2008, 03:59 PM   #6
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Yah, and i just checked for their horizontal floats too. Also cheap. No shipping from overseas for me now

horizontal 13.50-20 bucks for different formats.
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Old 01-08-2008, 04:00 PM   #7
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Yeah that are right off 294 and north ave
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Old 01-08-2008, 04:01 PM   #8
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How are you hooking it up to the MS?
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Old 01-08-2008, 04:50 PM   #9
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Not sure yet. I plan on having the solenoid run by the WI mod. Then I intend to have a dual map setup thats switch is a float based somewhere in the system... haven't decided where. So that when I'm 'out' of water/meth, the tune gets tamed automatically.
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Old 01-08-2008, 10:44 PM   #10
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Booh Tame Maps
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Old 01-08-2008, 10:53 PM   #11
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Quote:
Originally Posted by magnamx-5 View Post
Booh Tame Maps
30 minutes at wide open throttle and then running out of WI = BOOM.
Not everyone likes running without a safety net.
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Old 02-01-2008, 02:51 PM   #12
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FWIW doing a detuned map based on low water/failed pump/whatever sounds like a great idea to me. If I implemented a WI system that is what I would do. I need to read up on switching maps in MS based on an external trigger.

EDIT: found this thread. Looks like a switch to the EBC would do the trick. So when your tank is low, you cut power to the EBC. Simple.
https://www.miataturbo.net/forum/sho...=timing+switch
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Old 02-01-2008, 03:34 PM   #13
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Quote:
Originally Posted by Splitime View Post
I'm most likely going to emulate Joe's dual tank setup. It just seems ideal for an on track environment.
It's also pretty ideal for a street environment.

I'd avoid vertical-mount switches, at least for the bottom, for two reasons. First, on an American NA with the stock washer bottle, there's really no place for a switch to go on the bottom without drilling a big hole in the body. Second, using the vertical switch lets me trigger the refill system at a higher level than would be the case with a horizontal switch. (less chance of uncovering the pickup during high-G maneuvers)

And all you really need to make it work is one relay and one diode. It really is that simple.


edit: the detune idea is a good one which I'm implementing myself. Rather than trigger off of water level however I have a pressure switch mounted in the water line right before the nozzle. This way, the system will indicate not only an empty tank but also a failed pump, a disconnected line, etc. About the only thing I can't detect is a clogged nozzle, so I just pull and inspect the nozzle and filter once every six months or so.
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Old 02-01-2008, 03:45 PM   #14
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Could you replace the pressure switch to something that measures flow?
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Old 02-01-2008, 03:54 PM   #15
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you could do a flow switch.

Paddle is cheap (but usually large) I think the pressure is probably the best way to do it.
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Old 02-01-2008, 04:09 PM   #16
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I could. I haven't found one that was cheap enough and yet still able to measure the relatively minuscule volume of water flow we're dealing with.

I'd still want to keep the pressure switch, since a flow switch wouldn't detect that the hose has been cut or become disconnected. And all in all, I think that the chance of the nozzle becoming completely clogged without my noticing is pretty small.
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Old 02-01-2008, 04:11 PM   #17
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Joe, i believe they would.

A differential pressure sensor would definitely.
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Old 02-01-2008, 04:12 PM   #18
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Joe, the pump runs constantly right?


A flow switch wont work with this application. It would but it wouldnt read flow every time your off boost. And would ruin your map.
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Old 02-01-2008, 04:13 PM   #19
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Pressure differential across what? Only the nozzle itself should be generating any significant restriction, and I can't very well measure the pressure after that.
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Old 02-01-2008, 04:13 PM   #20
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Quote:
Originally Posted by Loki047 View Post
Joe, the pump runs constantly right?
The pump runs only when in boost and injecting.

Quote:
It would but it wouldnt read flow every time your off boost. And would ruin your map.
The idea is to switch between two maps- one conservative, one heavy. Only the boosted portions of the two maps would differ, the non-boosted portions would be identical. So technically, I'd be running on the "conservative" map most of the time, and it would switch to the "aggressive" map when the pump started pumping.
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