mar3

iTrader: (8)

I'm thinking that these Bosch plats, indexed in the housing so the fuel mixture passes between the ground electrodes, backed by an Accel 300+ DLIDFIS ignition system, oughtta kick some major spark butt...

Pic butchered from AutoWeek ad.....

inittab

WARNING: boys and girls don't try this at home unless you're damn sure that they don't stick into the chamber else you'll bust the apex seals first crank.

Give it a shot Mario, let us know how it goes.

MosesX605

No doubt. That'll earn you a rebuild really quick.

mar3

iTrader: (8)

That is the point of indexing and all. ..I'm going to dyno 3 major changes I'm interested in, before and after stuff. Two this year and the other next year, all at Alamo Autosports. First will be the electric fan change, then a nitrous shot (Yes, they will let you dyno that... ) and finally, next year, DLIDFIS with this spark plug change for the back half of the hour on that day. The big question is whether or not Bosche even makes the plug for a 12A....

79+80+84_rx-7

i have bosche platinum... those ones you told me was junk .....


hehehe...


and dont you mean Alamo Autopsorts?

79+80+84_rx-7

oh yeah.... whats indexing?

inittab

excellent! 'bout time someone did this.

Another spark plug mod that look interesting is the Side Fire Spark Plug Conversion. Paul Yaw also talks about side fire as well as a lot of other stuff about spark plugs on his IGNITION SYSTEM page.

Wankelguy

I've run Bosch platinums in my RX4's 13B in the past, they had a real strong midrange, but the top end was better with the BR8EQ14. The Bosch plugs were real good at starting oil-fouled motors, though, so I used to haul 'em around when I'd be messin' with old rotary cars out in fields and such. I lost track of them sometime back and would sure like to know what the number was. I think it was like "WR4CP" or something like that.
The best performing plugs I tried in my RX4 were NGK B8EV gold palladium plugs, but they just didn't last very long.

bill Shurvinton

I don't buy the bit about the mixture going between the Gap. However close to the limit you run the elecrodes will be recessed from the mixture.

What you want to do is fire the spark kernel out into the mixture. Take a peek at adrenaline research and their 'special' spark plugs. Problem is though, if you generate the ultimate spark you tend to knock out every car radio for 100yrds with W13B FM.

However any experiments in this field are valid, if only to save the rest of us a few $$$. I recommend getting a junked housing to check that the electrode is recessed enough.

When having a play I found that the denso plugs actually have the longest electode WxxERB I think. Worth a play once you've worked out their nutty heat range numbers

mar3

iTrader: (8)

Good idea on the housing check....79+80+84+a-whole-lotta-junk-in-the-yard_rx-7.......you still have the monster bridge port pieces? How about the dead 12A? I can find the answer to both styles, iffn ya do....

79+80+84_rx-7

yeah I got those 84 housings and one 80 housings.... sold the other already......





So feel free to come check..... lol.....


Laterz.......

On a side note.... you should buy/bring some of that vinyl paint with ya and i'll giva what ya paid fer it....




laters

mar3

iTrader: (8)

Now he tells me after I'm nowhere near a Pep Boyz...

79+80+84_rx-7

inittab

79+80+84_rx-7

Watch it now.....

79+80+84_rx-7

whats indexing? is it what us rednecks call "gapping" ?

REVHED

Indexing is installing the spark plugs so that the ground electrodes all face a certain way in the combustion chamber. It's done by using copper washers of varying thicknesses. In theory it's meant to increase performance by giving the air/fuel mixture better exposure to the spark.

mar3

iTrader: (8)

Espesially if you grind a wing shape into the electrodes so a flame "fan" is generated by the mixture running through the above plug's gap....

fatboy7

There is merit in doing this, but its going to be such a small power increase that you probably won't really feel it. Indexing alone, I've been told is good for around a 1-2% increase. So on our engines it should be good for a 1-2Hp increase. Not bad when complemented by other aspects of tunning...

mar3

iTrader: (8)

I'll put the word out just prior to dyno day and ask for everyone's samples that they want to try in this semi-controlled experiment. I have no intention of buying a ton of plugs all customed out to YawPower and others' specs to see how the various designs stack up on the same engine on the same day on the same gas with the same timing (...plus or minus 2 degrees). People send 'em in and I'll do it as long as the number stays reasonable...it's not that hard to change plugs, after all, and they let you get on the platform between pulls to tweak...

79+80+84_rx-7

BAH!



Are you doing this with your street port or the one already in the 83?


And when are you putting your little friend in there?



get on aim

mar3

iTrader: (8)

No AIM....'bout to hit the sack....it'll be the streetport...the 12A in the '83 now is going to do a "survival" night at Kennedale to see what a 25, 50 then a 75 shot of nitrous will do to a high mileage stock 12A rotary....for that night, I'll call and let you know so you can swing a ride out here...

Worse comes to worse, Joey can tow me home in his slammed '98 Dodge truck...

79+80+84_rx-7

LMAO!!!!!


HELL yeah, I'll even walk out there to see that!


(maybe have my 80 out?)

i wonder if the motor would go before the clutch.... LOL



Laters....

mar3

iTrader: (8)

good point..

79+80+84_rx-7

I bet it is gonna go bye bye before the motor........ all the better....... your dowel pin leak might turn into a flood also ......



EDIT: When do you plan on comming over to barrow some housings, lol...... No rush on the paint, still fighting brother for $30 I loaned him to fix his car....... he has it... he just wont let it go.....