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Garry
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Post subject: MSD RPM modules?  Posted: Mon Jan 06, 2003 8:45 am |
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Joined: Sat May 26, 2001 9:59 pm
Posts: 7823
Location: Bad Hersfeld, Germany
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Does anybody know what the MSD RPM modules, used for shift light or rev limiters, do? I know they are a simple 2-wire plug, but apart from that ...
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Garry Glendown * '99 Firehawk Convertible
"Horsepower is how fast you hit the wall and torque is how far you take the wall with you."
"Speed doesn't kill - suddenly becoming stationary on the other hand ..."
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Roy
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Post subject: Posted: Mon Jan 06, 2003 11:06 am |
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Joined: Sun May 27, 2001 2:52 pm
Posts: 5556
Location: Mehlingen,Rhineland Pfalz, Deutschland
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HAve you put a digital multimeter to one to see if there is any resistance, or if it is diode or transistor? i am guessing it plugs in to a series circuit.
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Roy
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Garry
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Post subject: Posted: Mon Jan 06, 2003 11:12 am |
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Joined: Sat May 26, 2001 9:59 pm
Posts: 7823
Location: Bad Hersfeld, Germany
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Roy wrote: HAve you put a digital multimeter to one to see if there is any resistance, or if it is diode or transistor? i am guessing it plugs in to a series circuit.
Actually, not yet ... just picked the whole crap up yesterday, and noticed I need a couple of them things for the 3way switch ... guess I'll have a look, but I don't think they'd go with a resistor ... I'll take a look at the 8000 RPM module tonight or so ... if I blow it, it doesn't matter, don't think I'd want my 350 to run @8000 as limit ... recon I'll put the 7000 in as a limit for the engine ...
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Garry Glendown * '99 Firehawk Convertible
"Horsepower is how fast you hit the wall and torque is how far you take the wall with you."
"Speed doesn't kill - suddenly becoming stationary on the other hand ..."
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Roy
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Post subject: Posted: Mon Jan 06, 2003 11:15 am |
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Joined: Sun May 27, 2001 2:52 pm
Posts: 5556
Location: Mehlingen,Rhineland Pfalz, Deutschland
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ChrisV6
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Post subject: Posted: Mon Jan 06, 2003 12:04 pm |
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Joined: Sat Oct 13, 2001 4:53 pm
Posts: 1041
Location: Erlangen <=> Coburg
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The RPM pills from Autometer are simple resistors
( http://venus.aros.net/~rbuck/tech/shiftpill.html ),
in Bitburg i carried always a box with cheap coal resistors
with me to adjust my shift light... 
Otherwise I really could spend a fortune to buy those pills.
I think the MSD ones are similar, perhaps just other resistance values for the different RPMs.
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Garry
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Post subject: Posted: Mon Jan 06, 2003 12:12 pm |
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Joined: Sat May 26, 2001 9:59 pm
Posts: 7823
Location: Bad Hersfeld, Germany
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Thanks for the hint - I will definitely measure the ones I have (3, 6, 7 and 8 k RPM) and see ...
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Garry Glendown * '99 Firehawk Convertible
"Horsepower is how fast you hit the wall and torque is how far you take the wall with you."
"Speed doesn't kill - suddenly becoming stationary on the other hand ..."
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Hawk
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Post subject: Posted: Wed Jan 08, 2003 5:52 pm |
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Joined: Tue Jun 26, 2001 4:25 pm
Posts: 4288
Location: Vilseck
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I have a window switch on my light coil wire and negative should get it working. Take roys advice and check voltage first. BTW 8000 is pretty high for a built 70's SB hate o se ya break a valve spring!!! Not saying there not out there but they have $15,000 and it is a solid roller setup with a crazy cam not very streetable but they sound really kewl.
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Garry
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Post subject: Posted: Wed Jan 08, 2003 7:29 pm |
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Joined: Sat May 26, 2001 9:59 pm
Posts: 7823
Location: Bad Hersfeld, Germany
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No, my point was that I can mess around with the 8000 module, as I won't need it ...
_________________
Garry Glendown * '99 Firehawk Convertible
"Horsepower is how fast you hit the wall and torque is how far you take the wall with you."
"Speed doesn't kill - suddenly becoming stationary on the other hand ..."
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