I followed a link to the pineapple site today, and since I haven't surfed through it in a while I started clicking. I clicked upon a pic that confused me. It was simply titled 13B-REW. If you look though, it seems to have 4 plugs per rotor. The standard leading + trailing, and 2 others drilled in at TDC. Any idea what this would be for? Redundant system for an airplane? They don't appear to travel too far into the housing (look at the plug in the rear housing)

 

there's something i haven't seen before.

 

I like the efini symbol beating like a heart. kickass

 

Thanks.. I made that quite a while ago. The heartbeat of Hiroshima? <grin>

 

Hmmm, thats interesting. However it seems that the TDC plugs arent evenly distributed compared to the width of the housing. My eyes might be fooling me.

 

very interesting....

 

for when you have positively got to burn every last muddaphukkin' molecule of fuel

rumor has it the tdc plugs are powered not on a capacitive discharge, but the flux-capacitive discharge system. 1.21 gigawatts of spark!

 

I know that Mazda tried 4 plug setups when they were working on the Renesis. There are pictures in Yamaguchi's RX-8 book. Mazda said they didnt' work that well. I have no clue what's going on with these.

 

i like my story

 

Repost! Someone originally explained the purpose of the 2 extra plugs, just can't remember what they were for.


Edit here's that thread:

https://www.rx7club.com/showthread.p...ineapple+plugs

 

...they're wasted spark grounds for his 4-coil 8-terminal ignition setup; not actual firing sparkplugs...

...for those who don't feel like thread jumping but HAVE to know...

...I dig the hugeassed waterpump pulley...

 

why wouldnt you just run 4 single post coils,

if he has gone to that much trouble my money is on them actaully firing...

 

...then you're money is lost. I'm posting information the builder posted to make things easier...

...well that was the original plan...

 

Damn I was going to tell everyone that they go into the water jacket and the spark is used to heat the coolant when the engine is cold!

 

So basically the same could be achieved by just grounding the wasted spark to the block? What we all want to know is there any performance advantage with this? Too me fancy grounds (if that's what these are) are just for bling.

 

Are you serious??

 

Ahh, glow plugs! For the dual fuel diesel/gas engine..

Seriously, Thanks Liquid Anarchy. I didn't see the other post.

 

That's what I was thinkin.

 

me too.

 

IMO, if there is anything gained... er.. wait, lost! these look like nology hot wires which can ruin your coils. the ground wire takes the grunt of the charge because it is easier for the spark to ground itself than to jump a spark gap. then the whole ignition system tries to make up for the lost spark by increasing output and eventually overworking its self to death. it happened to my old fc. please don't flame me for this.

 

read the link. it explains it well on the last page last post. Basically the coils that come with the EMS system being run needs the wasted spark, since you cant put a wasted spark on a rotary like you could on a piston engine, they just ground into the block. There is no way or reason to want to run something like that inless you are running the same ems as them, an electromotive tec.

Rob sure makes a pretty engine though. I like the powdercoating colour.

 

Let me toss in this , who has seen the rotor chamber shape for that engine????

 

...the guy who built it and said what the extra spark plugs were for...

 

wrong... the leading coils run wastespark....