Spark Plug Q

[coltboostin]

Ok, I have heard 3 different part numbers fo rthe stock plug for a 93 Eclipse turbo for Autozone, Advanced auto, and freakin Summit Racing!! So can someone PLEASE tell me what the stock NGK number is? And the one step and two step colder heat range plugs.
TO the best of my knowledge, the stock plug is the BPR7Es, and the BPR6ES, and 2 step colder is BPR5ES. Is this right or am I totaly wrong here?

 

[kpt4321]

Stock plug is BPR6ES. One step colder is BPR7ES.

 

[coltboostin]

?!?!
I hate my life
I had the BPR8ES NGK's in my hand and they looked hotter than the BPR6ES! THe freakin electrode was sticking out MUCH farther then the BPR^ES, which I though indicated that they were a hotter plug. Can someone help me out?!

 

[doug]

Are you sure one of them wasn't a BR instead of a BPR? The "P" means projected tip, which makes it stick out farther.

 

[coltboostin]

Would the BR and not BPR's do better in a 4g63? Is this what I am looking for? All of the plugs in question are BPR

 

[doug]

I think the BPR would be better-- there was a thread about this a few weeks ago:
http://www.dsmtuners.com/forums/showthread.php?s=&threadid=96083

 

[Defiant]

You want projected tip. It starts the spark that much further in the swirl, and is better-cooled by being in the intake stream. By the same circumstance, it's better-cleaned by being in the fire.