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Thread: FC leading ignition coil?
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Tom93R1
Redlining
Posts: 458
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posted November 24, 2004 10:14 AM |
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FC leading ignition coil?
Has anyboy used a 2nd generation rx7 leading dual ignition coil in their repu DLIDFIS? I have spent the last couple days trying to get it to work in an effort to reduce some wiring and eliminate the extra coil. I ran into problems of the ignition randomly breaking up at any rpm. Are the J109 ignitors not compatible with the FC coil? Or maybe my coil is just bad... I do have the ignitor that goes with the coil but that is going to be another pain to get wired up and I thought I should ask before jumping into it.
thanks
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'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!
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klaus42
Rotorhead
Posts: 1877
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posted November 24, 2004 07:08 PM |
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Coils rarely go bad...
...but, our ancient wiring sure might. Are you positive it's not some little bit of crap intermittently clogging fuel flow somewhere?
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Tom93R1
Redlining
Posts: 458
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posted November 24, 2004 07:49 PM |
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I redid almost all the wiring and still it ran quite poorly. I tried timing it but it kept missing whenever I would get the rpm's up over about 1500. I swapped back in the 1st gen rx7 coil I was using and it works perfect. I think the coil really did go bad. I am going to try another next time I can get back to the wrecking yard.
On another timing problem, I am not able to get timing anywhere between 0 and 30. The alternator bracket is in the way. I can turn the distributor one tooth back and forth and either 0 is fully advanced or 30 is fully retarded. I think I am going to have to cut a piece out of the bracket, has anybody else had this problem?
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'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!
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jfaplanet
Redlining
Posts: 356
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posted November 24, 2004 09:27 PM |
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Yes
I'm running a 12A 83 dist and have the same problem, I was thinking about taking the plate off and make it adjustable. Let me know what you come up with if it works out. Charles
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74 REPU "Red"
74 REPU "Jethro" "TII"
74 RE-Courier vert
79 SA-SE(aka deathtrap)
79 SA-SE-FC (project
turbo)
http://home.bellsouth.net
/p/PWP-crgj
TN Forum:
http://tnrotary.10.forume
r.com/
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Jeff20B
Moderator
Posts: 661
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posted November 25, 2004 02:00 AM |
 Edited By: Jeff20B on 25 Nov 2004 02:09 |
I got around the alt bracket problem by swapping the alt and the bracket to 1st gen parts. The older alts are slightly larger and the early brackets are curved a little differently. You can grind a little from the bracket if you want.
As for the 2nd gen coil mod, it's refered to as 2GCDFIS. To hook it up, you can use a J-109 ignitor as long as you retain the ballast resistor in the base of the coil assembly. Without the resistor, the ignitor will burn out. I drew a little exploded-view diagram for the club forum. Maybe I can find it... http://www.rx7club.com/forum/showpost.php?p=3481629&postcount=102
Here is the whole thread. It would definitely be a good idea to read all the way through it. http://www.rx7club.com/forum/showthread.php?t=243350
Good luck getting it to run on your truck. I still have yet to try 2GCDFIS or even MSD-DIS because DLIDFIS is working very well so far.
Hey, have you installed a relay yet? I run a 10AWG wire from the starter solenoid up to the inner fender where the coils are sitting. The original ignition wires are Y together and they switch a relay on. Then the power wire from the solenoid connects through the relay to the ignitors and coils. They get more 'juice' than my fuel pump. :)
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'74 REPU
'76 Cosmo
'77 MG Midget 13B
'81 RX-7
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klaus42
Rotorhead
Posts: 1877
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posted November 25, 2004 11:21 PM |
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Or...
...you may find that by simply bolting the bracket up to an alternate (nearby) location, your problem is solved... (if not, modify!) Mine is 'just barely' functional in such a manner... toughest part is, getting the cap to unsnap when it's in that 'tight fit' position...
Then again, come to think of it, how can I be 100% certain I'm even running the original bracket...?
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Jeff20B
Moderator
Posts: 661
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posted November 26, 2004 12:40 PM |
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I filed some of the plastic on the bottom edge the dizzy cap on the white truck when it still had the large alt. Then I removed the bracket and took it to a bench grinder when I put a new cap on. Then I got a 1st gen alt and now there is a large gap there. :) Or maybe I swapped in a 2st gen bracket? I've played musical parts a lot over the years so maybe the bracket is on a different engine. I can just barely recall a picture in my mind of the time when I had the filed-down cap together with the grinded-upon bracket. There was a lot of room right there.
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'74 REPU
'76 Cosmo
'77 MG Midget 13B
'81 RX-7
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