Denso IKH24 or NGK RS7?

[JerseyDrew77]

Stock plugs heat range are definitely not 8.

 

[jimlloyd40]

Stock plugs heat range are definitely not 8.

So what are they?

 

[JerseyDrew77]

7

 

[Diggs24]

Stock is 7.
Ruthenium is also 7.
Brisk ER12S are 8 (1 step colder).

 

[jimlloyd40]

So the Ruthenium plugs are the same heat range. I wonder if they are available in a colder heat range but then on the other hand Diggs car is running fine on them so it makes me wonder if colder plugs for tuned cars is bull.

 

[Diggs24]

I don't think it's bull. I just don't think I'm at the power level or running hard enough they are needed. If I autocrossed or drag raced it might be prudent to go colder. Quick bursts? nah, waste of money.

 

[jimlloyd40]

I don't think it's bull. I just don't think I'm at the power level or running hard enough they are needed. If I autocrossed or drag raced it might be prudent to go colder. Quick bursts? nah, waste of money.

The price should be the same shouldn't it? I plan on getting the Ruthenium plugs the next time I change plugs based on your experience but I'll get the 1 step colder if they make them.

 

[shovelhd]

NGK 95125 LFER7BHX Ruthenium HX Plugs

Thanks. Just picked up a set for $38 at Napa. No T shirt.

 

[oddspyke]

I don't think it's bull. I just don't think I'm at the power level or running hard enough they are needed. If I autocrossed or drag raced it might be prudent to go colder. Quick bursts? nah, waste of money.

Do you always run E50? That could be why your car likes the stock heat range plugs. Big time cooling effect. Unless you run 91/93 on them too, in which case I'm out of ideas.

 

[Diggs24]

Yes always E50. Car also performed well with the colder Brisks. Those go in next because I have a set lying around.

 

[jimlloyd40]

Yes always E50. Car also performed well with the colder Brisks. Those go in next because I have a set lying around.

What is your HP and torque with your setup?

 

[Diggs24]

What is your HP and torque with your setup?

375/375

 

[ChrisMk77]

375/375

The most sandbagged numbers on the forum
Should be atleast 50 numbers higher with normal IATs right?

 

[mw1978]

Diggs those NGK 95125 LFER7BHX would be good for stage 2 S3 on 93

 

[Diggs24]

The most sandbagged numbers on the forum
Should be atleast 50 numbers higher with normal IATs right?

dyno dont lie.