All I know is that Mazda tried all sorts of spark plug configurations and settled with the best in the end. Thats a little sketchy. I'd like to see what the differences will be. Very pretty too, nice job

 

I'll give you guys a hint by showing the following pictures of another 4-plug per rotor (4PPR) engine. Look at the pairing of the wires to the coils and you may understand the real purpose of the other plugs. That's probably too much of a hint...



These other pictures are just to show off the rest of that engine, which was pretty cool all the way around. We did this one about 7 or 8 years ago.




--
Blake Qualley
Pineapple Racing

 

Like I said, it's not what you think. You have to get out of the box.

 

who knows, but i wanna know!

overlapping leading and trailing plugs? to make sure the two stages of ignition cover the whole of the combustion chamber? (wild guess)

 

Nope.

 

Is this a street or "street" motor?

 

Looks like a anit -det device.

Motor looks sweet................ another nice creation from Pineapple. I thought that was the anti-det that KDR is ..."developing "

...Do tell

 

IIRC, the 'anti-det. device' turned out to be a plug (no spark) in place of the trailing spark plug.

 

well i have o idea what the hell is really going on here but my geuss is they are not spack plugs, due too the configeration fo the extra "black tipped" things they also have a different type of end i've never seen, so i have no idea what kind thing they would be used for, but my geuss is they are not plugs, but i'm most likly wrong, in such a case it just goes to show how i can't guess everything :P




Prôdigy

 

To make the motor look bad ***?

 

I'd say to just add more spark to the actual plugs if Prodigy is right about them not being actual spark plugs.

 

Okay, here's the real answer: They are not "spark" plugs but ignition grounds for the "wasted spark" setup. If you will notice, the coils have two high-tension terminals each; 4 coils, 8 terminals. Each coil handles only one spark plug, so the wasted spark is simply run to the engine and grounded there.

It would be a bad idea to put actual spark plugs in that location anyway. First, there is a tension bolt in the way and, second, it's just a very bad spot to allow the leading chamber to communicate with the trailing chamber through the plug holes.

Those are just small motorcycle plugs that terminate just inside the tension bolt hole. Sorry to dissapoint anyone, if you had grand ideas of the purpose. It does look really cool...eye candy, if you will.

 

Well considering those look like the plugs used in the Formula SAE car, I would assume their not rx7 plugs at all. Infact that looks almost like a wasted spark setup, with the plugs as a ground.

What ecu was this used with? Our motec, since it was a 4cyl used all 4, but this is an interesting setup.

I hope there not real, thats a horrible place for the plugs.

 

The EM that I'm using is a Electromotive TEC3R, with their high output coil packs.
Just like Blake said, the coils have a "waste spark" that needs to be grounded. So why not make some interesting looking grounds.

Props to Rob at Pineapple, thanks for all your help and I'm looking forward to getting alittle more fun out of this motor. I'll post the pics of the motor complete with all the components mounted that are powder coated too.

List of mods done:
Large street port
3mm 2pc ceramic grey premium apex seals
Cermet A rotor housings(thanks Rob)
Stage 3 oil mods
Alum sump and oil pan
with a little "eye candy"

Car
1995 VR FD
TEC3R(with their high output coil packs)
T-78 turbo
monster v-mount
3 1/2" down pipe
Apex GT exhaust

 

Hey I menchioned wasted spark first. Show me some love.


Anyways, I'm a little clueless when it comes to tuning. What's the advantage of this set-up?

 

i second that...whats it do?

 

This thread died inconveniently. Had to bring it back.

 

^im with this guy^, bring it back. so what is the advantage of this set up?

 

glad you brought it back, t-von.. Otherwise, I would of never seen it!

I learned something new!

 

thats crazy.,.,,m,,.m.,m.,m.

 

Uh.....I don't see the engine pic....?

 

i would like to know the advantage of this setup also

 

You won't make the big power till you three phase that thing, yea 220 is good and 480 would be better but when you put line voltage on it now were talking some serious power ! ! ! ! ! ! LOL Looks good four sure.

 

thats SUUPOIB! excellent.

 

isn't that just bassically glorified nology hot wires? it's the same concept of grounding the unused spark. but that just burns up coils. i'd be a little skepitcal unless blake can back it up. the engine looks stunning though.