turbosha

i have a 1989 lx hatch.stock bore/stroke, lunati roller cam,crane roller rockers,t-70 turbo kit. windsor heads,trickflow upper and lower. 42lb injectors,75mm mass air.etc..... it still has the factory dizzy and a msd tfi coil.i want to add a 2 step to build boost on the line (and the cool factor).will i need a complete msd system or is the 6al box compatible with the factory fuel injection?

Detroit Style

You will need a means of altering timing at the given rpm of launch. Easiest way would be add a MSD set up. The best way is to be add it to a stand alone.

turbosha

how will that work with the system in place now? cut and splice the wires going to the dizzy?

SonicBlueFiveSlow

You can use a 6al box with the factory ignition. MSD sells a adapter harness for the Ford TFI system that goes between the coil wiring and the coil. Then off of that harness there are 4 wires that go to the MSD box, it's actually quite simple.

As far as the 2 step, I believe you have to buy the 2 step module separately and that attaches to the box.

Harness: http://store.summitracing.com/partde...5&autoview=sku

6AL: http://store.summitracing.com/partde...5&autoview=sku

Detroit Style

Correct, you need to add the 2 step onto an existing MSD box. Really, you should have a good ignition based with a boosted car to start with.

turbosha

thats what im working on now. seems to misfire at about5k rpm.gap is alittle wide .035 plan on replacing plugs,wires,dizzy,and adding msd box. would the 6btm be better?then run the 2 step off that?

SonicBlueFiveSlow

The 6btm would work, I forgot they made a box specifically for boosted applications. 6AL is the first thing that came to mind because that's what I just bought. A full on ignition upgrade would be wise, you don't want your spark to blow out under boost.

Detroit Style

Hell, ignition is one of the first things I'm doing to mine. Replacing old parts is always a good idea, then preparing the car for the future is also a good thing to do. I plan on doing a 6al, 2 step, MSD billet dizzy, and MSD wires along with new plugs for my tune up here soon.

1990mustanggt

Here's an old couple of pics of my current setup. I love the 2 step/stutter box. LOL

302army187

on a unrelated note, whats that 347 put out?


got a thread you can link me too with build parts and numbers?