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Old 09-02-2014, 02:45 PM   #1
bowjangles
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Default electronic ignition,maybe??

Does anyone know what year the 13-B started using electronic ignition?






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Old 09-02-2014, 03:47 PM   #2
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Can't you just stab a 1st gen electronic dizzy (81-85) in there and make it work with very
little effort? You may be able to avoid even changing the front cover. Just leave one dizzy
hole unused. I could have sworn I heard this somewhere.

You're talking about an old school 13B, pre 80s vintage 4 port right?
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Old 09-02-2014, 05:24 PM   #3
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Quote:
Originally Posted by bowjangles View Post
Does anyone know what year the 13-B started using electronic ignition?
How do you define "electronic ignition" in this context? The first 13B's I know of that had electronic ignition (meaning defined by no points & condenser) were in the '84-'85 GSL-SE's. However the GSL-SE still had a single dizzy with a distributor cap & rotor, and it used a vacuum advance mechanism, so it wasn't a "full" electronic ignition in the modern sense. "Full" electronic ignition was introduced to the 13B in the FC ('86).
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Old 09-03-2014, 06:41 AM   #4
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Default electronic ignition, maybe?

O.K. guys, thanks for u r response, but I am not familiar with all the jargon that you used to describe the above ignition E.G "dizzy" etc. I'm a rooky!
Anyway,here is the situation in it's entirety;
I have an old 13-B in my Triumph TR-7, I think it is about a '74 and maybe from a pick-up. It has a carb and no turbo.
It is running poorly at present (missing, studdering, etc). Adjusting the carb mixture didn't seem to help so , I thought I would take a look at adjusting the points.
After removing the twin distributor cap, I find that there are no conventional, adjustable points there, and concluded that this was a breaker-less system of some sort.
Seeing this made me wonder if the previous owner had changed out the conventional points to something more modern? If so, I need to know what car and year they are from.
That's why I asked the question: "When did the 13-B switch over from normal points" to this system........so I could read up on them, and determine how to adjust them .
Any help appreciated!
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Old 09-03-2014, 08:54 AM   #5
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Quote:
Originally Posted by bowjangles View Post
O.K. guys, thanks for u r response, but I am not familiar with all the jargon that you used to describe the above ignition E.G "dizzy" etc. I'm a rooky!
Anyway,here is the situation in it's entirety;
I have an old 13-B in my Triumph TR-7, I think it is about a '74 and maybe from a pick-up. It has a carb and no turbo.
It is running poorly at present (missing, studdering, etc). Adjusting the carb mixture didn't seem to help so , I thought I would take a look at adjusting the points.
After removing the twin distributor cap, I find that there are no conventional, adjustable points there, and concluded that this was a breaker-less system of some sort.
Seeing this made me wonder if the previous owner had changed out the conventional points to something more modern? If so, I need to know what car and year they are from.
That's why I asked the question: "When did the 13-B switch over from normal points" to this system........so I could read up on them, and determine how to adjust them .
Any help appreciated!
We need to see what you have in there. Sounds odd.
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Old 09-03-2014, 11:20 AM   #6
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The '74 13B twin distributors (dizzies) from the REPU definitely had points. I spent a lot of time puzzling over how to adjust them many moons ago. It sounds like somebody probably used the Pertronix or other aftermarket electronic conversion on them if the points are no longer there.
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Old 09-04-2014, 07:17 AM   #7
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Quote:
Originally Posted by GySgtFrank View Post
The '74 13B twin distributors (dizzies) from the REPU definitely had points. I spent a lot of time puzzling over how to adjust them many moons ago. It sounds like somebody probably used the Pertronix or other aftermarket electronic conversion on them if the points are no longer there.


First off. No 13B came with twin dizzy. Period. Twin dizzy were available from 1968-1973 on 10A and 12A engine from R100-RX3. In 1974 mazda came out with the first 13B which a four port 13B single dizzy. The motor was available from 1974- 1978. It wasn't until 1983 that the 13B reappeared in the GSLSE RX7. As for your question about swapping to electronic ignition. Yes it possible many people have switched over. I am just curious to see a picture of your motor with a twin dizzy front cover on a 13B.
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Old 09-04-2014, 08:09 AM   #8
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Default electronic ignition, maybe?

O.K. guys here is a pic of the single distributor on my old 13-b.Inside and out.Any clues as to what I have here? Thanks again!
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Old 09-04-2014, 08:26 AM   #9
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Quote:
Originally Posted by bowjangles View Post
O.K. guys here is a pic of the single distributor on my old 13-b.Inside and out.Any clues as to what I have here? Thanks again!
Pic no workie!
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Old 09-04-2014, 08:36 AM   #10
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Default electronic ignition, maybe?

Sorry, guys.I can't figure out how to attach photo.Will keep trying
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Old 09-04-2014, 08:54 AM   #11
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Default electronic ignition, maybe?

O.K. here are the "Dizzy" pics
Attached Images
File Type: jpg Sep 03 2014_0968.jpg (89.1 KB, 15 views)
File Type: jpg Sep 03 2014_0969.jpg (87.1 KB, 17 views)
File Type: jpg Sep 03 2014_0970.jpg (160.9 KB, 19 views)
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Old 09-04-2014, 09:40 AM   #12
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Thats an FB dizzy (81-85). You can get the FSM at http://foxed.ca/index.php?page=rx7manual#firstgen.
You can adjust the mag pickups but thats about it.

I would do a tuneup first. Replace wires, make sure grounds are good, new plugs, cap rotor etc.
If you still have issues look in the FSM for testing the ignitors. Sometimes they go bad
but not often. Its usually some supporting issue like connections and wires.

All that said, it may have nothing to do with the dizzy or the carb.
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Old 09-07-2014, 07:42 AM   #13
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Default electronic ignition, maybe?

Thanks for u r help, .........what does F B signify?
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Old 09-07-2014, 07:51 AM   #14
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Quote:
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Thanks for u r help, .........what does F B signify?
FB signifies the 81-85 RX7's. It comes from the first 2 digits of the VIN #.
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Old 09-08-2014, 04:54 AM   #15
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Default electronic ignition, maybe?

So, in conclusion, my 1975 13 B engine, which was identified by the engine logo ,has a distributor from a FB (1981-85) RX 7 in it? Is this correct?

I will be looking for other surprises in this Old Girl. Stay tuned
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