deleting the trailing or leading spark plugs?

[drive_4_thrills]

iv seen many times that on other rx7 are not using one of there spark plug wires and witch one are they not using the trailing or leading plug? and whats the benefits? sorry to ask but i could not find it through searching. THANKS

[Kentetsu]

They are probably using a direct fire ignition system. Take a 2nd gen coil pack, hook that up in place of the original coil, run the plug wires directly from the coil pack to the spark plug. This leaves you with two less plug wires coming from the distributor cap.

Run a search on direct fire and you will find instructions.

[sen2two]

Others remove the trailing coil packs all together. I have seen it done mostly on FD's, and just a few FC's. It prevents detonation, but you will lose some power.

[drive_4_thrills]

i found some info about that direct fire mod and it looks like thats going to be on the top of my list for mods under the hood, im just gona have to figure out the wiring for a while and find better right ups on it. i still got to finish my vr6turbo swap than the rx7 will get the love it deserves. i cheacked the spark plugs yesterday and they are needed to be done asap but i have to order them :/

[IH8DSM]

Originally Posted by drive_4_thrills

i found some info about that direct fire mod and it looks like thats going to be on the top of my list for mods under the hood, im just gona have to figure out the wiring for a while and find better right ups on it. i still got to finish my vr6turbo swap than the rx7 will get the love it deserves. i cheacked the spark plugs yesterday and they are needed to be done asap but i have to order them :/

problem with the 2nd gen direct fire is it wears out the coil faster mine lasted 6 months

[drive_4_thrills]

Originally Posted by IH8DSM

problem with the 2nd gen direct fire is it wears out the coil faster mine lasted 6 months

man theres usually a price to pay with more power upgrades, other than that is there a noticeable power gain?

[t_g_farrell]

I had the second gen DFIS setup and its is much better than stock but
you wouldn't want to delete the trailings, they still help some.

That setup burned out ( it was the ignition box on the SA I think ) and now
I use GM HEI ignitors and Ford TFI coils (one for each leading plug). I then
removed trailing and stopped using the vacuum advance because this
setup was so much better than the 2GDFIS. Very simple, strong and easy
to source replacement parts cheap.

[drive_4_thrills]

Originally Posted by t_g_farrell

I use GM HEI ignitors and Ford TFI coils (one for each leading plug). I then
removed trailing and stopped using the vacuum advance because this
setup was so much better than the 2GDFIS. Very simple, strong and easy
to source replacement parts cheap.

can i see some pics and if u can also show vacuum adv delete also. i read something that it was better to just have the distributor fixed position?

[t_g_farrell]

Unfortunately the only writeup I have is on the other forum. Do a search on
that forum using my username (its the same everywhere) and you'll see it
show up. Lots of pics and diagrams for wiring it up.

I don't want to post the direct URL here out of respect. Maybe someday
I'll have the time to reproduce some of my how to stuff on here.

[drive_4_thrills]

Originally Posted by t_g_farrell

I don't want to post the direct URL here out of respect. Maybe someday
I'll have the time to reproduce some of my how to stuff on here.

o ok i allways find myself going back and forward from site to site