1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Can this MSD Limiter be used?

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Old Jan 4, 2007 | 11:05 PM
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Can this MSD Limiter be used?

http://store.summitracing.com/partde...5&autoview=sku
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Old Jan 5, 2007 | 01:00 AM
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I don't see why not, but you would need two of them. One for leading and one for trailing. But, there are much better people than me out there.
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Old Jan 5, 2007 | 08:02 AM
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Limiting the leading ignition is enough to cut engine power.
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Old Jan 5, 2007 | 12:49 PM
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Both leading and traiing needs to be cut.
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Old Jan 5, 2007 | 02:55 PM
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Originally Posted by speedturn
Limiting the leading ignition is enough to cut engine power.

Yes, It would cut engine power, but it would also twist your shaft like a corkscrew. Trust me on this one.
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Old Jan 5, 2007 | 04:52 PM
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why do people run the MSD 6AL on just leading, which is also a rev limiter...because then only is getting cut
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Old Jan 5, 2007 | 04:56 PM
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It is true you can run a 6AL, but you cannot use the rev limiter function with only one box. Read into all the MSD threads and you will quickly see this. You HAVE to use two boxes, wether two seperate limiters like the one in question, or two 6ALs.
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Old Jan 5, 2007 | 09:19 PM
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why could i not bridge the one revlimiter to both coils so it cuts both??
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Old Jan 5, 2007 | 11:06 PM
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Good question........ That just might work. I don't know exactly how that one wires in. I just know that with the internal ones (6AL), you need two, but with an external....

Can you post a wiring diagram for the unit? That would let us know for sure.
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Old Jan 5, 2007 | 11:39 PM
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Hey i have just installed 2 msd 6al ignition boxes with 2 msd coils.
I was talking to robert from rotary shack and he said that for the limiter to work i need to remove a cover on the msd ignition box and cut three wires. I dont really know when cover hes talking bout and what wires i need to cut? If soem one could fill me in on this that would be great because i want to start the car thhis weekend.
Thanks again,
Brent
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Old Jan 10, 2007 | 11:27 AM
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got the wiring for it.......so is it possible to splice so that this one box triggers leading and trailing??
Attached Thumbnails Can this MSD Limiter be used?-untitled.jpg  
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Old Jan 10, 2007 | 09:18 PM
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Just use one 6a. its that simple!
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Old Jan 10, 2007 | 09:24 PM
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OK, according to the diagram, I would have to say YES. I believe that you could use just one of these to do the job.
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Old Jan 11, 2007 | 04:30 AM
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I would say most definately NO. How can a device with one input/output control two seperately timed ignition events?

You'll need two of those boxes set to four cylinder mode. Either that or get a limiter with more then one channel it there's such a thing.
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Old Jan 12, 2007 | 07:49 AM
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i bought an MSD set up from a forum member. i assumed itd be two 6a, but it was actually one 6a and one 6al. what do i need to do with the 6al? can the rev limiter be turned off?
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Old Jan 12, 2007 | 01:53 PM
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Originally Posted by REVHED
I would say most definately NO. How can a device with one input/output control two seperately timed ignition events?

You'll need two of those boxes set to four cylinder mode. Either that or get a limiter with more then one channel it there's such a thing.

Umm that would be because they are concurrent events. Could be wrong, but you should be able to use the trigger to cut power to both channels. If i read the diagram correctly, this thing just cuts out the ground to the coil.

Anyone else good with electronics, chip in and set it straight.
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Old Jan 12, 2007 | 06:39 PM
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I already set it straight. It won't work.
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Old Jan 12, 2007 | 09:34 PM
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ok but if you are using 2 msd 6al's then what wires do you need to cut to run the boxes.?
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Old Jan 12, 2007 | 10:43 PM
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can you use a 6al and not use the limiter? or do i need to sale the 6al and buy another 6a?
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Old Jan 12, 2007 | 11:33 PM
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I am not sure what wire there is to cut. I use a 6A myself...


as for the limiter, if you don't want to use it, you don't have to. You can use the 6AL and the limiter just won't function if you don't hook it up. Everything else will work just fine.
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Old Jan 12, 2007 | 11:44 PM
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thank you for clarifying that for me jonjon
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Old Jan 12, 2007 | 11:44 PM
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Use One box...to control the Leading ..Just wire it Between the Coil and the Wires "from the Car" .. here is a way to do it With the Crane HI-6..(wires up basically the same) http://www.fc3s.org/how_tos/electrical/hi_6.html .The only other way I have seen to wire the Trailing is using a Box for Each Seperate Coil/Plug...this gets expensive...Crap Edit!..shown for Sec GEN..(hope it may be Some use anyhow.Post is stayin)
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Old Jan 12, 2007 | 11:47 PM
  #23  
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OK for the Rev Limiter Select, go to the following link. Page 4 of 24 listed under Cylinder Select. That will tell you how to change the setup of the boxes.

http://www.msdignition.com/pdf/6%20series/6series.pdf
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Old Jan 12, 2007 | 11:52 PM
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i bought the set up from a member. he was running both on his SE. im debating running both on my SA weekend fun car(mods in sig) or one on it and one on the DD GSL. theres also no room in the bay of the GSL for a 2nd gen coil, let alone an MSD box.
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Old Jan 13, 2007 | 12:02 AM
  #25  
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There is always room, just depends on how ingenius you can be at finding space. hehe

I have only ran one box, so I can't tell you if it is worth it to run both in your car. But, I will say you will notice a difference when done.
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