msd 6a ignition box fires off of the lead pickup.Does it fire both plugs at the same time? If so can you fire both stock coils off of the lead

pickup? I want to eliminate the trailing plug :banghead: fire when it feels like it emission crap!! But don't want to spend $600.00 to do it.

Any advice??

the trailing plugs fire seperatly than the leading and if you eliminate them you will loose power. The combustion chamber is long and needs the two plugs to burn all of the fuel.

Yea thats why I wanted to go with direct fire.....something about wiring two coils to the msd and one coil to the dizz and then running two plug wires to the leading plugs straight from the coils and then two plug wires to the trailing plugs from the dizzy. Using three coils all together, It sounds really good. The Msd fires for so long that you get complete burning of the fuel.



Dont do this by the way....I dont know that this is how you wire it. I put a post in about how to wire it up like this but I dont know myself. No one answered the post.

theres intructions on WWW.mazspeed.com but the pictures are messed up. goto facts and put the pointer on the only link on the page then goto "hooking up the msd"

I am told that the trailing plugs don't fire during certain R.P.M. to maintain the burn in the thermal reactor.

What controls this and how do I get them to fire at all R.P.M.?

I am removing all emissions and installing Racing Beat header and

pre-silencer to stock kat-back pipe and muffler but I don't know if

what I am removing from the (RATS NEST) has anything to do with

the plug not firing.

only the 79-80's do that



mike

only the 79-80's do that



mike [/quote]

Soooo... how would a guy with an SA 79 or 80 bypass that feature? Or should we?

only the 79-80's do that



mike [/quote]

Soooo... how would a guy with an SA 79 or 80 bypass that feature? Or should we? [/quote]

um theres some box you need to bypass or a wire you need to cut. i'm not sure its been 10years since i had one



mike

Thanks for the help. My manual is for 80 and earlier rx-7's.

Incase you dont already frequent this site: This isnt intructions or anything but it might help you understand it all a little better. And it sure helps with everything else

http://www.iluvmyrx7.com/1st_gen_manuals.htm