I am in the process of setting up a Greddy kit for my car... came across this link for associated parts recommended for the Greddy Turbo kit:

http://www.rotaryinsider.com/faq-tac...cost-gap62.htm

Everything seems pretty straight forward, only question i had about was the spark plug recommendation.

"9. Spark plugs. You'll want to run colder plugs on your turbo. The stock plugs run about $35 each and are too hot for this application. It's recommended that you get the NGK-5255 plugs. You'll need four. Figure $50 for a set. RECOMMENDED"

Havent read about too many on the forum having to change to a cooler running spark plug... So i am hoping someone can shed some light on this ? And would it hurt to run these cooler spark plugs ? (all 4)

 

Jason had a lot of info for turbo owners. Running cooler spark plugs is not a bad idea, recommended as well (in my opinion)

There maybe some better plug options than the ones you have above though. Not sure about that.

 

Cool, I have a BHR Ignition kit coming as well. I purchased 4 of those spark plugs for pretty deng cheap... but then i started to think that maybe i bought the wrong ones, since the oem ones are soooo much more expensive. Will these work for all 4 spots, trailing and leading ? I know the oem ones are different trailing vs leading.

 

Search bro, it's all been discussed at length. The Greddy Turbo spec thread lists what each person is using.

 

your post is worthless bro

 

I've searched man... Read through many people's build threads on the Greddy kit, learned A LOT, and like i said i havent read of many (or any) people switching to these colder plugs. Just asking for a simple answer, that is all-- Am i able to use these same 4 spark plugs in all plug positions without any real adverse effects ? If not please feel free to school me, or link me. Thanks for the help !

 

There is a thread that list most of the Greddy owners and their specific setups. The thread I am referring to is a freakin' sticky in this very forum. In that thread you will see the plugs that each Greddy turbo owner runs. Based on that you can get a pretty good idea of what the norm is. I'm not trying to be a dick but this has been covered many times man, a basic search on the topic would have revealed that. More and more threads on the same subject only drowns the threads that contain good info.





STFU noob, the sticky threads are here for a reason.

 

You know what 9krpmrx8, I have actually looked through the "Turbo Owners - Please Fill This Out" thread.... skimming through it, I never noticed the column for plug type. So in a way, thank you for answering my question.

Just wondering... wouldnt it have been easier to just fill me in with the answer ? or link me. I also hate when people ask general dumb questions aka "how do i turbo my car ?" I dont post much, and I only post when I am looking for guidance or advice. There's so many people on this forum quick to yell SEARCH NOOb...... when this should be a place to help others as much as possible. But who am i kidding--------> every car forum is like that, ha.

 

It would have been easier but I'm trying to make a point man. Turbocharging an 8 is a big endeavor and the stickies are there because they contain useful information. If you make a habit of skimming over these threads then you are doing yourself a disservice. Don't be lazy man, it will cost you. Trust me, I speak from experience.

 

you may want to turn around and head in the other direction

 

your post is also worthless bro

 

good point....good to share the experience...

hey man, i just tell you according to my experience...i ran once time with all 4 plugs, the same, but i ran the rx7 plugs, forgot which one it is, i can tell you if you want. i use it in summer, it's ok, but as for now, my tuner told me to run stock plugs...i think stock one is good, and no body ever prove that they blow teh engine by using the stock plugs (unless i am missing something)...don'tknow..
but if you wanna find out, try it, it's ok..as long as you don't boost more that 12psi to do teh test..lol...
good luck with everything..
steven

 

hey man, your post is worthless too...which this one is too..
steven

 

if you track an FI car it would be best not to use the oem plugs. I do know that.
Basic rules for any FI--especially with our compression ratio etc:
1- use the highest octane gas you can resonabily get and tune for it.
2- use the best ignition system you can afford( that includes plugs!)
3- insure youre fuel pressure is adequete at all times
4- get the temps under control
5- FI on this engine means a more intense maintainence scheculed is needed.
So yes a step colder plug is recommended. Just because some use the oem plugs and get away with it doesnt mean thats it is ok to do.
If you run the strapless plug then you really need an upgraded ignition system. Those plugs have a big gap that has to be jumped. If you run a plug with a grounding strap--CAREFULLY reduce the gap to 29-30. denso plugs have a more robust strap than the ngk and it can be adjusted with more confidence. The ngk plug strap is easily broken.
After all the money a person spends on an FI install---dont cheap out when it comes to spark plugs.

Seems that I am the only one running the step colder denso's? I didnt see anyone listing them on the stickie.
OD

 

nice one....
steven

 

Appreciate the feedback fellas ! I'm looking to run the NGK-5255 plugs in all 4 positions along with the BHR ignition. I baby my car, and ill be playing it extremely safe trust me... I'm stationed in Germany and I'm looking forward to running the 'Ring here in spring, WITHOUT the turbo setup. I just dont feel comfortable pushing a turbo Renesis that hard, on a track that rough, for that long.

My ideal goal is to 'recreate' the RX8 into what i feel it should have been in the beginning... 300 rwhp. Nothing fancy, no shiny pipes, no advertisements. Shoot, if i could reach that goal on a stock exhaust and without gauges in the interior, I would lol.

 

he gets it, you win 2 internets =)

 

Getting 300WHP on a stock Greddy T618Z turbo is not likely even with supporting mods. My goals are similar even with an upgraded turbo. Aside from the gauges, it takes a keen eye to even know I'm turbocharged. I did not want gauges but in the end decided it is best to have them. Plugs are the least of your worries.

 

Oh yes I know sir... just waiting for my kit to arrive in the mail so I can forward the turbo to BNR for their upgrade. In the meantime I'm reading up, soaking up knowledge, and preparing for this huge transformation that I have committed to.

 

Maybe this post is worthless bro ( but you are doing this on a #? milage engine, just curious.

 

04 with 23k miles

 

yeah, that might happen if you have a healthy engine, for little bit,....but, make sure tune it good...just follow the advice teh fellas above mentioned
steven

 

*NGK BUR9EQPs in all 4 spots .
*Put an extra sparkplug washer on the trailing .
*Replace the leading every 4000 miles
*Replace the trailing every 8000 miles

 

That's part of the risk of trying to enlighten a blockhead

 

Boom. Simple. I like it. Thanks for the feedback bro