Alrite, i'm do up to change plugs, this question is more for guys with 400+ whp, im around 22 psi with a 35r, stock motor, stock coil packs and wires, what plugs you guys running, don't have to necessarily have the same setup but putting down around the same power, the reason i ask cause i was on lancershop.com and saw they have a recommendation for one step colder plugs with a modded evo, but they don't say exactly what mods, just modded, so let me know what you guys running, thanks

 

Hey man, I've always run the NGK Coppers in all my cars and never had a problem.

 

whats the part number for those?

 

I'm not producing 400 whp like you. I'm at 312 whp on my EVO 8 and I just installed NGK BR7EIX plugs. These are only half a step colder than stock and figured that would be best for my setup.

 

Well with a IX, they really don't have a viable copper plug. So you will have to run at least a one step colder Iridium plug.

 

No don't run anything other than stock heat range on the 9. I run stock plugs at approx 415-425whp on stock turbo gapped at .022

 

the NGK IR ILFR7H?

 

i stopped last at 570 on a mustang dyno, evo 9 i use denso

Denso Iridium Power IKH24 Spark Plug gapped to around .20 ish combined w/ spoolinup cop i have no spark issues

and i confirm there is no copper plug for the 9

here's a link to get them cheap as well




SparkPlugAuto.com
735 W. Duarte Rd. Unit 302
Arcadia, California 91007
United States
PHONE: 626-446-2565
WEBSITE: http://www.sparkplugauto.com
EMAIL: info@sparkplugauto.com
Order #5040
STATUS: Shipped
DATE: 09/17/2012, 05:43 PM
PAYMENT METHOD: Paypal Checkout
SHIPPING METHOD: Standard Ground (USA)
Customer:
Jason McMillan
mack1ooh@gmail.com
PHONE: 1234567890
Auto Make: -

Auto Year: -

Auto Model: -

Mileage: -

Bill to:

San Antonio, Texas 78216
United States
Ship to:

San Antonio, Texas 78216
United States
Product Quantity Unit price Subtotal
Denso Iridium Power IKH24 Spark Plug
Code: IKH24
4 $7.44 $29.76
Subtotal: $29.76
Shipping cost: $4.47
Total cost: $34.23

 

Yes, those are the correct ones.

 

br7eix. 30 psi on 91 octane. gapped to .024, running stock coils and HKS DLI 2.

My favorite plug right now.

 

He drives a 9 not an 8 so those plugs do not work

 

There is a heat range 6 copper plug for the IX
https://www.evolutionm.net/forums/10361140-post288.html

 

doh!

 

my bad, i wasnt aware, when looking for my own car i was told by a very "knowledgeable" shop they didnt exist

 

ngk br7es