tekno62

Need a little help…

I did the search and found the following

Nice info - http://www.silverbulletrx7.com/plugs/index.html

https://www.rx7club.com/showthread.p...ght=spark+plug

Needed this post https://www.rx7club.com/showthread.p...ght=spark+plug

this post really got me confused - https://www.rx7club.com/showthread.p...ght=spark+plug

Im to the point of my rebuild where I need to replace the plugs..

My ignition is stock so would like some pointers

list of mods

RE V-mount
PFC
DP
550CC pro injector
1300 Sec injector
99 Spec twin turbo’s

plan on running stock but getting tuned at SS8


Tek

iron4jones

So what exactly is your question?? If you are asking what plugs to go with just go with NGK 9's all around.

tekno62

well plugs yes.. but I didnt know if I should look for something like the MSD 6a #6200 with my list of mods

scotty305

iTrader: (2)

I'm no expert, but I've done some experimenting with spark plugs. I've used all 9's on a stock motor, and right now I'm trying some Autolite plugs, Leading: AR3934 , Trailing: AR3932. The heat ranges would be 8 leading and 10 trailing. I haven't had issues with fouling or breakup.


Personally, I like the idea of using the colder plugs to draw more heat out of the combustion chamber. My theory is that heat is one of the primary causes of destroyed 13B-REW engines.

-s-

iron4jones

I dont think you would need an ignition amp unless you are running high boost or if you experience ignition breakup. I personally would get the HKS Twin Power because I have heard nothing but good things about it.

tekno62

just so I got it right on leading and trailing...

leading is the bottom plug and trailing is the top?

maxcooper

Yes, that is correct.

The fact that 'trailing' and 'top' both start with 't' is a useful device for remembering which is which.

-Max

neit_jnf

iTrader: (17)

and "L"eading is "L"ower

hehehe

scotty305

iTrader: (2)

Here is some spark plug info straight from the manufacturer, including a good explanation of 'hot' vs. 'cold' spark plugs:

http://www.ngksparkplugs.com/techinf...31000&country=

-s-

DMRH

Nice read but was pretty basic. Was actually hoping for some info on rotary combustion.... Too much hope I suspect.......lol

Mate, since your 92-95 is pretty stock, stick with the NGK range as both NGK & Mazda have spent millions getting the plugs perfected for rotary consumption.

If your running under 14-psi of boost, use the BUR7EQ + BUR9EQ range. If your going above that, step up a heat range for insurance (eg, 8 + 10)

tekno62

my Fd would be considered stock?