Спасибо.Купил я сегодня себе одну из не многих в Киеве Rx-7, принимайте в свои круги.

The rotary really only NEEDS the leading plugs. The trailing plugs do little in the way of power and driveability and are primarily for emissions cleanup. In fact I have known of people who drove around on a dead trailing coil and did not know it for a long time. I have in fact driven cars like this as well and the only thing you may notice is a very slight change in it's personality during startup and a very slight change in the low rpm torque characteristics when taking off from a stop or on a hill.

In fact a few years ago KD rotary came up with the infamous "anti detonation mod" which they tried to keep secret for a while, promised to help modified turbo rotaries live longer. It was eventually discovered that they were inserting these tiny aluminum dummy plugs on the end of the trailing spark plugs, to fill the holes in the rotor housings, then unplugging the trailing coil and changing the computer tuning a bit.

I wouldn't do it just to be doing it, but if there's a specific reason then it won't hurt the engine as long as you rev it up often enough to displace any extra carbon built up on the trailing edges of the rotor faces. That's really all the trailings do, attempt to clean up the little "pocket" of unburned fuel left at the trailing edge of the rotor face as the combustion chamber narrows and gets "pinched off" as the rotor passes the trailing plug. It's mostly for emissions purposes.

Guys, that's exactly what I'm doing on my MegaSquirted 20B. I couldn't justify the extra work involved in keeping trailing and its required three extra coils and ignitors just for a measley 2 extra HP (which wouldn't even be noticed on a chassis dyno). Besides, I'm trying an experimental ignition system which outputs an ignition event once every 60° of eccentric shaft rotation which just so happens to work great with the 20B's 120° rotor phasing by sending a spark to each leading plug when it would normally fire, and then another one 180° later. It's just like an FC or FD leading ignition system, but since none of my rotors are phased 180° apart, I couldn't simply spark any of them together; I had to get creative. Anyway, from the plug's perspective, it wouldn't know whether it's in a 13B or a 20B.

I'm running NA for now but may go turbo some day. It's nice to know that I'm not the only person here who thinks trailing isn't worth much.