Stupid question.....

I did this and it seems to run great , But why do we switch the trailing plugs to the leading spots on the cap?

Jason

 

Welcome to the search button.

 

Jeff....

No need to be rude. Tell me exactly how you would search for that?

I was checking out LokiRX7's website and he has this mod done but his trailing wires are still on the trailing spot on the cap.

I know you have like 80000000 posts compared to my 600 but if you dont have an answer and it wasnt covered in the thread then why even bother posting!

Anyone with an informed answer please let me know....

J

 

I wasn't being rude. Have you read through the whole thread? Has it been covered here? I honestly don't remember. I know I've answered the question many times before in several threads over the years. All you have to do is search and it might turn up. There's nothing rude about that.

Hmm... I bet if I used the terms "move trailing wires" with my name in the other field, in the 1st gen section, it would turn up several hits. I'll try it right now...

Yeah, 19 hits. In a post I made on 04-05-05, 01:27 PM, I stated what to do and the reasons why. It was in response to some questions about a GM HEI setup posted by PT Ray. Nothing rude about that.

As you get more aquainted with the way we in the 1st gen section answer posts, you'll see that I wan't being rude at all. Heck, if you think I'm rude, steer clear of Manntis and Rx7doc!

 

from my understanding you switch the wires due to the fact the leading points on the dizzy cap have elss resistance than the trailing. this will in turn improve spark while prolonging the life of the dizzy button and cap.

 

Sorry if I took it the wrong way.....

As for Manntis..... One of the nicest people I have ever dealt with (aside from AussieMG)

J

 

My head is spinning after reading all this stuff on the 2nd gen direct fire ignition upgrade, I'm sure it's much easier than it seems. I'll find out next weekend when I have the coil. But for now, could some generous sole answer a really basic question?

I realize that I need just the leading coil pack from a second gen, but does it matter what kind of 2nd gen it comes from? I know these 2nd gen degenerates came with turbos and nonturbos, and in searching around, there seems to be several designations for the coil packs, indicating they are different. Which one should I get? Or does it matter?

Much thanks for this information and for those who contributed to this post, which I will read again when I have a day off.

Ray

 

ray, it doesnt matter. all FC coils are the same. this is an awsome mod. i know youll love it.

 

ok i read another thing on this an i thought you completly replaced the 1st gen system and ray the 2nd gen like it was the firs gen. 2 wires from the 2nd gen sys to the distributer and the all the wires out. that wont work will it. of course i wont know cause im still waiting on an intake

 

Ray, I'll second that. All the coils are the same. I still personally prefer DLIDFIS because it's reliable and I've been running it on various vehicles for years, but lots of people have had decent results using the 2nd gen coil and some form of ignitor. The longevity/reliability of the transistor trick is still to be proved. It's a lot easier to just get yourself one of those GM HEI ignitors and hook one end to the leading dizzy output (leading pickup red and green wires) and the other end to the 2nd gen coil (remove the stock leading J-109 ignitor). Be sure to include the 2nd gen ballast resistor somewhere in the circuit. I can't tell you where because I've never hooked one up as a permanent installation - all my playings with it have been experiemental.

 

Thanks Jeff, I was looking at the DLIDFIS link listed in the FAQ section before, but didn't dig deep enough to see your descriptions. You should put these under a separate post with a clean title like: DLIDFIS Installation by Jeff. Or better yet, how much could we pay you to put together the ultimate tutorial on your DLIDFIS install for the complete idiot? Bonus chapters would be changes for the 84/85 owner and comparisons with the 2nd gen method.

I like the idea of going with the 1st gen mod, if for no other reasons that I already have all those parts (wouldn't have to buy the 2nd gen coil at least) and the 1st gen coils are bigger - bigger is better, right? Also it would keep my first gen from being adultered by 2nd gen parts.

A couple questions first:

1. I have an 85 GSL but your descriptions are for the 79 with 81 dizzy. The main difference seems to be the location of the ignitors to the dizzy in the 85. Can they just remain there and be wired accordingly?

2. What are these boxes, do they have anything to do with the installation?



The one with the blue wires looks like fusable links, but the black one looks like it might have something to do with the ignition. Is it part of the install? If so, I haven't been able to find it so far looking at the diagrams and scanning the reams of text.

I know, I know, do a search and read the posts. But this will take days and it would be a neat project for the weekend.

Thanks!

 

Oh my.

That picture is from my white REPU. It shows the wire loop mod that must be done when upgrading the alt to internal reg. The black thing is the relay I used for DLIDFIS. The two are not related in any way. They're just close together. I can see how the picture can be confusing.

I'll say it again: I have never hooked up DLIDFIS in an RX-7. I've never even messed with the ignition of a 1st gen. The only ignition stuff I've done is upgrading points to electronic 1st gen distributors in older rotaries and project cars. Each electronic upgrade was followed by a DLIDFIS upgrade.

Since you're curious about DLIDFIS and would rather install it than any 2nd gen parts (I don't blame you there lol), I'd recommend you start a new thread with a clean title like DLIDFIS: how do I install it in my 85? Or something like that. I'm sure Dave Meyers and some others can pop up and mention what they've done.

 

Thanks Jeff, great picture, especially now that it makes sense and it will be very useful when I get my REPU someday. I'm going to do some more reading and try to figure out which would be best (and easiest, unless there's a big difference in performance) for converting my stock 85 GSL. If I can reverse the mod easily, I won't even mind having some 2nd gen parts in there, who know, I might get used to it.

 

I kept each DLIDFIS install reversable, but haven't had the need to remove it. Shame on those who cut off the pickup connector/wires in the dizzy.

 

Direct Fire using FC coil with re-wired resistor is a "waste of time." No improvement over the stock system. Again, that is just my opinion and would rather do DLIDFIS for much stronger spark. Im bored so I installed it in my sons stock FB. Next is the GM igniter DFIS.

 

I'm trying it too. Will post my results!

 

Did it yesterday and so far me likey! I think it made the motor sound different too! More mellow.

 

I used a couple of GM HEI ignitors in the GLC for DLIDFIS. That things fires up quick and runs like a raped chimp.

 

Raped or Inraged Chimp?
Never heard that one before.
Similar to (Runs Like a Banchee in Heat)?
Still a Great Quote Jeff.
sgieldon
steve

 

I would have says 'runs like a raped ape' but it's a big streetport and most of its power is higher up in the rev range. Plus it's a small car. It's also orange. Ok, a better quote would have been runs like a raped 'tang.

I'll save the raped chimp thing for the 13B powered MG Midget... which also has porting, although milder, and of course DLIDFIS.

 

hi i was reading that people have had problems with ignitors blowing on 3rd gen coils because they are running 2 coils, is there a solution to this or does it work ok on the 2 gen coils

 

dont run two coils, just run one 2nd gen direct fire coil. if you want to spend some money you can buy a MSD direct fire coil.

if you keep burning ignitors, go to a GM ignitor, or better yet, a MSD box.

i ran my 2nd gen coil for a year. my leading ignitor burnt out towards the end of that year. was it due to my 2nd gen coil set up or age? who knows?

id run the 2nd gen coil and th if you burn out two ignitors, throw on a MSD box and never worry about it again.

 

Thanks im gonna go with the 2nd gen leading coil as discribed (good cheap option) then like you say if i keep blowing ignitors go for a different set up

Mark

 

i wouldnt go for a different set up.

me, i want the best. i have to be a little budget minded due to being a broke *** college kid.

IMO, the best ignition set up you could have would be a MSD box with a DIS coil. the cheapest, a 2nd gen coil. the best(not sure if it is better than the T2 coil as i have no personal experience with one) is the MSD DIS coil.

dont ditch the DIS coil if you burn ignitors, just ditch the ignitors. IIRC, the GM ignitors wont burn up like the stock ones. i also dont have any personal experience with them either. this is just what ive gathered from threads.

 

its just your imagination.