So new development thanks in part to Jeff20b
I had my old MSD sitting on the shelf, so I figured I'd use it. I didn't want to use the MSD-DIS that I came up with because I didn't want to spend the money on the MSD coil that wasn't up to my standards. I tought to myself that I might be able to use the 2g leading coil I had. Jeff confirmed it and in it went. Easy as pie install. It's same as any other MSD direct fire install. Red to power black to ground use the magnetic pick up to trigger the msd by hooking MSD purple to dizzy green and MSD green to dizzy Purple. tuck away the white MSD wire and don't let it short outon anything. And hook up the msd orange and black up to the 2g leading coils + and-. Simply throw the ignitor away or sell it. Back story; The car had 2 brand new coils, brand new plugs, wires, cap and rotor, so you cannot say the only difference was replacing old parts. Anyways there was a huge driveability difference. BIG BIG BIG difference, there is no hesitation anywhere, cold startup is now easier than hot startup, the engine is running in 1-2 revolutions of the e shaft. I have no high rpm misfire at all. The weirdest thing of all is how much it changed the sound of the car. It literally has a totally different sound to it. I mostly believe that is the result of the wasted spark, but either way it drives about a billion times better now.

Note: remember you donot have to use a MSD box that's why this is called a 2nd gen Multiple spark directfire ignition setup. any multipule spark system will work. eventually I'm going to trash teh MSD and get some Mallory Digital boxes...

 

Before you did this were you just running a stock coil with the MSD or just a completely stock ignition system?

 

I can't wait to see it!

Heh, your description of how much better it runs, change in sound etc reminds me of me back when I was experimenting with ignition on the REPU.

 

Doc, I think it had stock ignitors and aftermarket round coils. Don't recall the plug wires but I'm sure it had a stock replacement cap and rotor. Don't know which plugs he had.

 

What I am curious about if he was running just stock coils if he ran the standard 2nd gen leading coil with the stock ignitor if there would be any felt difference between the MSD set up versus the standard set up?

 

13b street port. It had brand new stock replacement coils stock cap and rotor and Racing beat wires. the RB wires worked with the 2g coil. 12a plugs brand new. I replace the plugs about every 5-6k. It was a stock FB ignition set up. now it's a MSD direct fire with the FC stock leading coil.

 

Well, If you got very energetic one day I would really like to see you unhook the MSD box, reinstall the stock ignitors and run the 2nd gen leading coil to see if you experience any difference between the 2 systems. I have looked at running a system such as the MSD and others but would really like to see if there is a "Felt" or noticeable difference between the two.

 

I think the Msd only makes a difference on start up and below 3k driveability. Kettleman did a dyno of DLIDFIS and his stock system and saw no gain in whp, not 1 whp. I set it up so when I go make my baseline dyno tune I can easily swap the stock system in 2-3 minutes and see if I can dyno a difference between stock new componets and the 2GMSDIS.

 

Thank you for the feedback.

You might want to experiment with using at least the 2nd gen plugs for the leading side.

 

I've been running this setup for over a year, I still think the transistor trick ran better, but couldn't get it to stop overheating. I've run this on track and autoxes and it runs great.

 

oh yeah, I'd use the second gen plugs as well as the doc said (which i'm also doing), seems to be a bit smoother yet that way.

 

Here is the picture of the setup, still need to rewire the whole thing...

 

I have tried both MSD with dual coil set-up, DLIDFS, MSD with FC coil and FC leading coil direct fire as well as FC trailing coil direct fire..

I cant tell the difference between MSD dual coils and DLIDFIS; both have consistent spark (observation using the flash on a timing gun). Either one is good.

MSD with FC coil is ok but im not impressed.

FC coil direct fire = better than nothing.

thats my honest opinion.

 

A few years ago I ran the MSD directfire with 2 coils. I didn't likt the idea of the MSD having to split power to two coils and that's what spawned the idea to buy the DIS coil. It ran a billion times better than two coils. I'd say the 2gmsdis is identical to how well the MSD-DIS ran. Being these are completely different engines it's like compairing apples and oranges. Personally I don't like the 2nd gen plugs they shroud the spark too much and i've never felt they ran as smooth as 12a plugs. Plus for some reason the 12a plugs lasted so much longer with a MSD than the FC plugs. I thinl it's because the electrode is so shrouded there isn't anywhere else for the heat except the electrode, so the electrodes just seem to ware away too fast. Plus you can't gap them at all, where as you can kinda gap 12a plugs if you've got skills.