lovintha7

Well, I got the circuit a few days ago, and today I decided I had time to install it. Install takes around an hour, but I also used sodder and shrink wrap fittings. I switched to the 2nd gen BUR7EQ plugs as well. Left the stock BR8EQ-14 in the trailing. On initial fire up, started fast. I first flipped the switch to the fixed pulse width, but I couldn't get it to idle well, so I switched over to the variable. Man, what a difference. Idles smooth and like a dream. Low end torque seems to be up. Acceleration seems to be quicker. Throttle response is very quick. Very nice setup and I suggest that the $20 I paid for it with shipping is more than worth it. My digi cam decided to take a dump and not want to focus so I'll have to borrow one. I'll get pics up as soon as I get back from vacation (July 5).

Bryan

gsl-se addict

iTrader: (3)

That is awesome, man. Glad that it is working out well for you. Any pics or other impressions of the mod would be great since this is an experimental setup. I need to add a switch to mine. Mine is currently the fixed pulse mode only and doesn't work that well. I am going to try to gather some data this weekend (manifold pressure, idle rpm, etc.) to get a quanitative measurement of how this mod stacks up against the stock system. As long as there isn't a problem with heat issues, it appears that the variable pulse width is the way to go (this is also the simplist circuit to build).

Kent

lovintha7

I did notice that the ignitor housing did get quite hot, but that may be normal. Maybe I could wire up a heatsink and a fan from a computer somehow.

gsl-se addict

iTrader: (3)

That is my main worry. That was the motivation of doing the fixed pulse mode (try to get the temps down). Bench testing, the fixed pulse mode seemed to stay cool, but in the car got it got hot as well. TurboSE checked the coil pack on his buddy's TII. He said that after a 30 min drive, it was hot enough to burn you if you touched it for more than 3 or 4 seconds. So, it sound like the temps are normal. I will try to setup a trhermocouple or something on mine to see what temps we are getting. If we could find a 2nd gen guy to do the same (either with IR, thermocouple, etc.), we could get a good comparision our temps and the 2nd gen temps.

Keeping it cool is always a good idead. Certainly wouldn't hurt to add a heatsink and/or fans.

jayroc

Cool, I haven't been able to install mine yet. I still need to find a coil. Hopefully, I can get one this weekend.
BTW, I am calling this the "Abel Ignition" 'cause the whole 2g...., is too long for me. Thus, it is so dubbed.

Hades12

Link???

I guess I missed that a Circut was being sold.

gsl-se addict

iTrader: (3)

Hades: You know about the transistor trick thread, right? Here it is for those who haven't seen it:

https://www.rx7club.com/1st-generation-specific-1979-1985-18/transistor-trick-2gcdfis-411312/

Well, for these guys, I built some circuits. I built one for lovintha7, jayroc, Kentetsu, and TurboSE. Jayroc and lovin aleady have theirs. Kentetsu and Turbo will have theirs in a day or two. These guys are going to be testing the design out. Once we know what works the best, we can probably simplify the circuit down. The ones that I built had both a fixed pulse width setting (2ms) or a setting where the J-109 set the width. So far the non-fixed mode seems to be the better option, but we will see with further testing. If we simplify it down, then I will likely be able to build more for people that feel that they don't have the electronics knowledge to do so. The main issue is finding a source of ignitor conectors. I installed connectors just like the stock system, so it is easy to install or switch back to stock if needed. I used an old dash harness for these connectors and some of the wiring. I am now out of these connectors, so I can't build any more circuits until I find another supply.

Hades: I can guide you through the circuit if you want to build one. I may be able to build you one too if I can find the parts I need. Keep an eye on this and the other thread. So far the results have been good.

Kent

lovintha7

No, no one can have mine. I love it. Simple install and great results.

Kent,

It may be a little more tricky, but I suppose you could attatch female blade connectors for the J-109. I'll see if I can find an electronics store around here somwhere that might be able to point me out. The Radio Shack guy down the street is a dick, so I'm not dealing with him.

gsl-se addict

iTrader: (3)

Glad you like the circuit so much. I like it too (the variable mode). Now that I got your circuits built, I'll add the swicth to mine so I can go back to variable mode.

We could use female spade connectors, but the problem is people getting them mixed up. I killed an ignitor that way. I used the connector like on your circuit, but I connected the wires from memory. Well, I had them switched. When I went to crank, it basically made a short between the battery + and ground though the ignitor. The excess current killed it. I don't want others to have to experience this.

jayroc

I may have a few of those connectors lying around. I might could send you a few. You can find them on FCs as well. s4 ones, anyway, though there arent many on that harness..

vipernicus42

iTrader: (4)

Sweet... Glad to hear things are rolling along quite well with it.

When sales start, count me in!

Jon

Marek

iTrader: (2)

I Also just finished the swap in. The second circuit with the IC chip failed to work and my voltage regulator kept overheating. The simpler 2 transistor one worked like a dream. Keeps cool too. She's mounted and all epoxied up. Things i've noticed:
Make sure plug wires reach contact on FC Leading coil
Ground out the top of the voltage regulator
The circuit has proved to retard the timing of the leading quite significantly. Right now my distributor is running full advance and it feels like it could go more. I messed around with l/t split and <10 Degrees seems to be optimum.
I have yet to try the FC plugs but thats todays adventure.
I have experience with DLIDFIS, SLIDFIS,MSD(clone) and ive run many coil combinations inclduign some motorbike coils. This has given the best responce and most benifit out of the whole. Great setup and i'm already beinging to convert other FB owners in the neighborhood to it.

gsl-se addict

iTrader: (3)

That is good info. I haven't checked the timing on mine yet. It is amazing that it changed that much as there shouldn't be that much delay in the circuit itself. Maybe the delay is built into the 2nd gen ignitor. There are a couple same changes I made to the circuit. I also realized that I did not show the resistor that goes between the C terminal and the base of the first transistor on the diagram. What value did you use? I started with 1k, but then I found the voltage at the C terminal to be half of battery voltage. This is because the base of the first transistor in near ground. You get a voltage divider between the B terminal (battery voltage) and ground. I changed the resistor on the ones that I built to 33k for the resistor at the base of the first transistor. This keeps C terminal nearly the same voltage as the B terminal (0.4 v or so less). I don't think it really matters as the C terminal is just a collector. It shouldn't matter what the high state voltage is. I just made the change so that it would be closer to stock. Here are some installation instructions that I wrote up for the people who are testing circuits that I built. This also has the most up-to-date circuit design in it.

http://oregonstate.edu/~abelk/Manual...structions.pdf

Kent

lovintha7

I guess I better check the timing. I did notice a RPM drop from around 100-200 RPMs and sometimes acted like it wanted to die, but then pick back up.

I'm running a mild SP, Sterling carb w/ custom ported intake (or I will be next week), and RB SP exhaust. What do you guys think the timing should be? Leading and trailing?

Kentetsu

Received my gizmo a couple of days ago, looks sweet! I'm starting to feel like James Bond or something with all of my assorted switches and black boxes...lol

Anyway, I hope to have it installed in the next couple of days and I will take lots of picks. Verified today that my timing is dead on at the moment, so we will see what it does after the install.

Can't wait to see the results, but time issues are a problem since wifey sprained both ankles. Didn't know how much she took care of until she was unable to walk..... Bummer. Anyway, shouldn't be too much longer and I'll get the gizmo installed.

Thanks again Kent!

TurboSE

i got mine a couple days ago......But i had problems getting my timing right......Well I bought a new pulley....So i finally got my timing right (also it turns out that my leading trailing igniter plugs were switched :....and the car is finally running good....it was kinda slow in the low end before Boost........And..........Then I installed the Transistor trick circuit...
FAT *** DIFFERENCE!!! in low end torque and the car just Keeps pulling after 6K RPM's ......This is SWEEEEEEEEEEEET!!!! Thanks Kent
Woooooohoooooo!!! BTW I'm taking my car to the track tomorrow!!!

gsl-se addict

iTrader: (3)

Glad you got it worked out. Did you find out why you were having a weak spark? Hopefully this will help with your flooding/fouling situation. Are you running the variable PW mode, too? Keep us up to date on your experiences. Glad you like the outcome. Good luck at the track.

Kent

TurboSE

My wires were bad(leading spark plug wires)weak spark .....and It seems to work better w/ the normal mode....I could'nt get it to idle well w/the switch on=( so i didnt try it.........I'll drive it arround w/ the extended pulse and post the results tomorrow.....I just left it w/ the switch off B/C I was so happy w/ the results that I forgot about it!!!LOL

gsl-se addict

iTrader: (3)

You probably won't have good results with it switched to the fixed pulse mode (switch towards the LED). I know with my car it doesn't work that well and lovintha7 experienced the same thing. It works okay up high, but down low and idle is worse than stock even. Go ahead and give it a try, but I think that you'll like the variable PW mode more (what you are running now).

One thing that I noticed, it is hard to get the 1st gen plug wires to get all the way down and make conect with the 2nd coil output. I'll have to see if I can find some wires that fit better. My wires should be replaced anyways. I have no idea how old they are.

Kent

TurboSE

I got new second gen wires and plugs.....works great!

gsl-se addict

iTrader: (3)

Thanks. I'll maybe try that. I figured that they may be too long.

lovintha7

If you twist the boot and wire where they hook up to the coil, you can get the boot to slide up the wire. plug the wire in, and slide the boot around the coil.

TurboSE

12.9 @ 100.9MPH Best time
My second gear is worst now

gsl-se addict

iTrader: (3)

Cool. Was this your first time at the track? If not, how does this time compare to previous ones? Sorry about the tranny. Do you have a TII tranny in there or the SE tranny?

TurboSE

TII and yes it was my 1st time