hey guys, i have a s366 large street ported motor.
Aem series 2 ecu
aem coils
will be bumping up the boost close to 25lbs,
what spark plugs should i be using?
Im currently using the stock 9's.

 

i would like to know aswell since im switching to e85

 

https://www.rx7club.com/alternative-...s-e85-1009558/

 

NGK 2396 6$ a plug, had great success with these up to 500hp. sparkplug.com has the specs. Need a thin wall socket.


Currently using 3857 for leading and 4311 for trailing. 30$ a plug.

rockauto.com has good prices and ship fast.

 

NGK R6725-115
$30 each at Jegs

$14 each at Amazon

$25 each on ebay (look for greddy Rotary Plugs)\


and knowing you arthur from your thread you break things like i do you got some power.... so g big or go home

 

if my car wasnt my main car to daily i wouldnt mind putting in a $25+ plug and having it changed every 6-7 months...

 

Let me know how the tuning goes with the AEM Series 2, I will be tuning with one of those pretty soon...all the best

 

tune went awesome!
aem is the way to go !
ran the autlite 3932x plug
made 570whp

 

my 9 second car is a daily.... just need to be able to manage everything in the car so that i always runs perfectly

 

You ran it at PBIR?? Thanks for letting us know so we can represent rotary. If you would have let us know we would have shown up.

 

Nice , how much power in the new injector ?


By the way I'm running stock 9 plugs all around at 25psi.

 

Hey. Just wanted to clarify. That was 570whp @ 25 pounds on e85. I'm running a similar setup and just want to see where abouts ill end up. I also switched to AEM V2. Thanks.

 

NICE..... Congrats on the 9's .....

What was your 60 foot times ? What tires you using to make that beast hook ?

 

Nice. Could you post your dyno chart? I have a similar set up but had some issues that needed fixing before tuning can be completed.

 

im also curious what your doing trans wise and all that.
WHat trans? what tires on the street?

 

"tune went awesome!
aem is the way to go !
ran the autlite 3932x plug
made 570whp"

congratulations!

score one for the Autolite Racing AR3932X... at a store near you for $5

 

hey howard does that need a thin walled socket?

 

What is the heat range of the Autolite AR3932X compared to NGK heat ranges?

 

AR3932X is a 10 heat range

 

would those autolites be any good for moderate 300 whp on pump gas? or should I stick with the NGK 9's

 

the AR series requires the smaller plug socket and there is no interference w the plug rail.

i am told they are a touch cooler than the typical 10.

they do come in 8 and 9 heat range also.

given they resemble the stock OE plug (multiple grounds), they are of high build quality i would think they would be excellent in a 9 for stock to moderate hp apps.

howard

 

hmm might try them. these greddy plugs in 10 heat range are expensive! i just dont wanna be a test dummy on them ha! still running stock fc coils with hks twin strike.

 

What are you gaping the NGK 2396 plugs at, if you don't sharing?

 

.022 to .025

 

Does anyone know the AR3932X equivalent in an 8 and 9 head code?