Can someone tell me what size of shims i need for the rx7 plugs? I know I need 2mm but I need the inner and outer dia. Stainless or copper?

 

uh one that just fits around it like the normal washer on the plug?

 

Looking for something a little more specific.

 

Most people get twice the miles out of the RX-8 OEM plugs.

 

^+1.
I only used the RX7 plugs once, now I stick with OEM.

 

i vvouldn't throvv shims on there if i vvas you.

not even throvv on 9 heat range trailings on the leading slot... they are different seating length.

aren't you just gonna mess up the seating of it and throvv off the heat range?
stay avvay from shimming it. get real plugs that has a specified heat range for the slot its suppose to go in!

 

^what is with you using two "v" to make a "w"?
Is the W key broken on your keyboard?

Anyway, the trailing RX7 plugs needed shimmed because they were too long and would damage the apex seal.

EDIT: Here is a thread explaining it
https://www.rx8club.com/showthread.p...&highlight=rx7

 

^^you are not getting the point.

DO NOT do any sort of shimming to a plug. especially one out of an rx-7.

not only are you not getting proper heat range, but vvhy are you going to put a set of plugs having more resistance over the stock rx-8 plugs, and have to go thru the trouble of "altering" its length to fit?

have any idea rx-7 plugs are cheaper?

those are the reasons.

they are longer, aren't designed for our housings, has higher resistance, and throvvs off the design heat range.

vvhats so neat about using rx-7 plugs?

 

Wow... sometimes I don't understand people...
I was just relaying a quote used in the link I posted above:
And if you paid attention for once, I also mentioned above that I used these plugs once, but now stick with OEM.

 

Many of us running the Rx7 plugs do so for the sake of having a colder plug for our boosted applications.

 

Thanks Mawnee! Why people reply to a question with an argument or another question is beyond me???? I just want to know what the OUTER DIAM. OF THE SHIMS ARE PEOPLE ARE USING WITH THE RX7 PLUGS?. I know the inner diam. is roughly 13.8-14mm.

 

I've looked all over for a post with those specs and cant find it. Thats why I'm only running them in the leading

 

You can get colder plugs for Renesis easy. NGK has them, everything else is just NGK rebadge.

 

Where can I find these colder plugs??? Any part numbers? For now I guess I'm going to try a 14mm inner diam and 20mm outer diam shim for the rx7 plug.

 

vvhat's up vvith the double vv for w....this isn't the first post!

 

i guess sometimes I don't understand people.

i don't really care if someone quotes this or that. as i've also quoted another source and gave genuine solid advice!

AND for needing to direct me to "pay attention", i have been.

so giving advice here just go as far as the person taking it... and for those that HAVE been paying attention like me and others i've quoted, i'm only adding to their advice.

plain and simple: don't use rx-7 plugs because
- they have higher resistance
-incorrect plug length
-not the same cut (may affect flame propagation)
-needs modification(from shimming, that can alter incorrect heat range)
edit: -may cause electronic interferance if not altering from a resistor type to a non-resistor type
turbocharging does not change the story!
and quoted by others to have gotten more MPG using oem rx-8 specified plugs

so use rx-7 plugs if:
-you've got extras off of your rx-7 for emergencies
-if you're too cheap
-if you're stupid
-just have the need to be "different"

get properly designated cold range leading rx-8 plugs and use them. stop complaining about free advice...

its like posting on the amount of ATF to premix, and not have someone point you straight and arguing back, instead of giving thanks.

my advice and others have been left. take it or leave it, its ur car and ur mistake.

just don't post for a bail out if anything happens.

best of luck!

 

sometimes i get the feeling that people don't look for clues, or just hard of hearing. even after someone like you and I make it very simple to.

 

If I remember correctly, the tip is angle differently than the RX-7 plugs

 

Speaking of being too cheap..why dont you fix your computer?
Secondly, he didnt ask anyones advice on what plugs to use. He asked a very specific question when he started this thread. The fact that he knew the rx7 plugs work and that he needed shims shows that he did alot of research. There is a TON of info on these plugs from people on these forums. And they are recommended and used by some very trusted, respected and knowledgeable members.

Have a flip through this thread to see just how many people are running these plugs. The first page alone was nearly all using them.
https://www.rx8club.com/series-i-major-horsepower-upgrades-93/turbo-owners-fill-out-please-121542/

Now, if you have personal experience with these plugs failing or directly doing damage to an engine then by all means, create YOUR OVVN thread to share it with us.

 

[QUOTE=Mawnee;3183582] The fact that he knew the rx7 plugs work and that he needed shims shows that he did alot of research.


maybe i should just laugh?

you telling me he re-engineered a spark plug's heat range thru the use of a washer?



please don't drive an rx-8 anywhere. take the short bus!


i'm sorry.....


so sorry that i had the patience NOT to flame the thread from the very beginning!


now go and put some of those shims on your wheel studs to get a aggressive offset.

 

None of that is fact.... you are just quoting opinions and heresay.

Mileage and Longevity can have alot of contributing factors. Show me some hard data.

The tip IS different, not incorrect, just different. Much like the multitude of different designs and material plugs you can buy for any other engine.

The only factual potential for damage is if you DONT shim them in the trailing position, but we all know that.

And none of that outwieghs the FACT that so many people have been running them just fine.

Shoo go away troll.....

 

no, no....

use those shims for a hood prop.

or use them on your calipers for a cheap big brake kit...

should i start a DIY on the 1000 ways to use your shims.

its SHIMwow!!! (beware of imitators)

 

seriously, i am trying to be nice.

thought about being nice, but figured, F*&% it some guys are an ***. i gotta have fun sometimes...

so go ahead rotards, go shimtastic!

and i see you're turbo'd... but i wouldn't worry about it because maybe you shimmed your turbo manifold to reduce back pressure.

 

moderators....

please laugh. this really is some funny shi*. mm

haha! did i spell shim again?

please look at this clown.

if i'm the one to get a warning on this for trying to be helpful, it'll be very SHIMFUL!

 

i running them 7 plugs vright nov n have miss fire like a cross fire! going to put some oem ones in tonight