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Join Date: Mar 2003
Location: dfw, texas
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update on starting problem
just for the records.
some of you may remember my monthly postings about my no start problems. starter motor was replaced, battery cables were replaced, alternator was tested and checked out fine, alternator wires were inspected, grounds were cleaned, battery was replaced etc turns out i just had a draw coming from fuse 7. ill have to get in there and find out where exactly. i hated that cd player but i do like having the clock. when i have some money i think i will replace the voltage regulator with an adjustable one to be sure
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84 944 Non Alcoholic |
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01-08-2004, 03:00 PM
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Location: St. Petersburg, Florida
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Well, on the positive side, you will have a brand-new robust electrical system when through!
Wow, all that from a radio short?
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83 944 white w/Boxster wheels Planned mods- custom leather interior, 968 antenna, soundsystem, 968 style rockers, clear sidemarkers
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01-08-2004, 03:10 PM
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yea i hate electricity. but at least i know more about it.
Also, thanks to everyone who helped! SoCal, FRWilk, VT944, and AFJuvat were there on almost every thread
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84 944 Non Alcoholic |
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01-08-2004, 06:28 PM
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ZZZZZZZZZZZZzzzzzzzzzzzzzzzzzzzzzzZZZZZZZZZZZZZZZz zzzzzzzzzzz
What??? Oh... OK. ZZZZZZZZZzzzzzzzzzzzzZZZZZZZZZzzzzzzzzzzzzzZzzzzzz zZzzzzzzzz...
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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01-08-2004, 09:30 PM
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Think of electricity like water. When you break a conduit the electrons run out all over the ground.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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01-08-2004, 09:40 PM
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well if electricity is water what is power? pressure or flow? or both?
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84 944 Non Alcoholic |
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01-08-2004, 11:11 PM
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Current.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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01-09-2004, 07:48 AM
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Location: Cordova, TN
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IIRC Dad who is an electrical enginer told me that when comparing water to electricity
Pressure=Voltage Flow rate=Current Gallons per minute=Watts Diameter of hose=resistance
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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01-09-2004, 04:13 PM
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and of course, Watts = Power
good analogies
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Tom Early '85 944 |
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01-09-2004, 05:11 PM
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Flow rate = V
Diameter of pipe = A V/A = R VA=W W = All that water in my lap
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"We are the music makers and we are the dreamers of the dreams" -Willy Wonka |
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01-09-2004, 08:47 PM
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Quote:
Diameter of pipe = A V/A = R VA=W W = All that water in my lap
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"We are the music makers and we are the dreamers of the dreams" -Willy Wonka |
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01-09-2004, 10:42 PM
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GAH! if FRWilk doesnt get it i have no hope.
E=IR for electricity right? and P=F/A for water so I(electrical term)=P(water term), E=F, and R=A. does that hold up? voltage=force? watts are power but what is amps?
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01-09-2004, 10:51 PM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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Quote:
to quote a line from that Gregory Hines - Billy Chrystal movie. (don't remember the name) "So how many watts are in that center rail anyway??" "enough to push a fukcing train! now SHUT UP!" (or something like that anyway) 
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01-10-2004, 01:19 AM
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Maybe I am explaining it wrong I dont know the answer but flow rate (if that is the right term) can remain the same, but if I change the diametter (resistance) of the hose the gallons per min (output) will change. So flow rate is not equal to gallons per min. I thought flow rate would be more like feet per second.
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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01-10-2004, 06:15 AM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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you're close! gpm is flow-rate. diameter = restistance, and pressure = current
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01-10-2004, 12:42 PM
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Location: Fort Collins, Colorado
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No, Ronin...V=IR, not A. In your case, pressure=voltage, not current, which is V/R.
Current = flow rate. When talking about fluids, electrons included, flow means, by definition, volume of fluid passing a point per unit time (vol/time = gal/min). Feet per second is a speed (distance traveled per unit time), which is about a centimeter per second for electrons in a wire. If you make the diameter of the hose at the pump discharge larger, the flow rate will remain the same (pump specific), the speed will decrease and the pressure will increase per Bernoulli's principle. Therefore, as the diameter of the discharge hose decreases , the pressure in lbs per square foot increases and the flow rate in gpm will remain the same. |
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01-10-2004, 10:40 PM
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Quote:
so according to bernouli's principle for fluids by decreasing resistance (area) you increase voltage (force). is that correct for electricity? what do we measure current in?
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01-11-2004, 02:07 AM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
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CURSES! foiled again!
 need to get my head back into the books. obviously been a while 
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01-11-2004, 02:11 AM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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I did catch that too. one cm per second would be about one mile every 17.6 hours! (if my tired-a$$ 3:30 a.m. calculations are correct)
as for the rest, I'll check my answers later....
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01-11-2004, 02:40 AM
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Location: Fort Collins, Colorado
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Electron drift velocity
Sorry folks, I was wrong. Electrons actually move a hell of a lot SLOWER than 1 cm/second. More like 2.1 milimeters per minute. But thanks for making me check!
   If you want clearer pics to peruse, give me your email address and I'll send better files to ya. -Tom |
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01-11-2004, 08:36 AM
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1983 Porsche 944 2.5 liter
