P = Protruding The porcelain sticks out a little, and its best to stay away from those. I believe they have the tendency to run a little hot.

 

Recently swapped out my well worn IW24s for a set of BR7ES, hadn't realized that I bought the non protruding plugs but apparently they are plug of choice over the BPR7ES which NGK lists as the plug for car. Haven't been able to log my timing but the car seems to run smooth a 1,000 miles in on them. In another thread it was mentioned that the non protruding electrode type plugs pull an extra 50-200F from the combustion chamber, or about a half step colder then stock.

 

p= **** off


for some reason, every tuner seem to recommend the copper ones.

they said it lasts longer than the BPR7es.

I was gonna get those, but you know, i want the BPR8IEX, the iridium ones...

from what I heard, BPE8Es has problems, BPR7ES isn't cold as stock... and they both run hotter, ignite less...

i can't believe who's right and who's not anymore...

 

I've used both the bpr7es and br8es. With meth I have read to step back up hotter due to the cooling effects of the water/alky. Just went from the 8es to the 7es.

 

This is very confusing to try and follow.

 

how long is your interval between changing your plugs?

I could get the BPR7es for $1.50 each, but BPR8IEX is like $30 a set (suppose to last longer)

 

Both Al and Shiv seem to recommend the NGK copper plug with the non protruding electrode, BR7ES or 8, I'd say try them out at the cost and just change them every 5k, I had little luck with the pricier Denso IW24s.

 

get these: Denso IW01-24

 

For those of us, like me, who don't memorize all the NGK part#'s... can someone please translate what they all are? Like, which ones are the standard copper ones for us, which ones are the 1-step colder copper ones, which are iridium, which are 1-step colder iridium, etc. Thanks. =]

 

Ex: BR7ES, BPR8EIX

Copper = ends in S
Iridium = ends in IX
P = Protruding (affects heat range, raises it a little)

7 is the stock heat range for the evo, anything higher is colder and anything lower is hotter; general rule of thumb on any spark plug is lower numbers are hotter then higher numbers

So transulating the examples:
BR7ES = non protruding, stock heat range (for the evo), copper
BPR8EIX = protruding, one step colder (a lil warmer then a BR8EIX though), iridium

 

Just curious, why does lancershop.com advertise NGK BPR6EIX has normal iridiums for our evo's but NGK BPR7EIX as one-step colder iridium's?

 

slightly OT...has anyone ever tried NGK V-Power Racing spark plugs? I was considering running a set since they are available in a 7 and 8 series heat range. Just curious if anyone has had any experience with them.
-Pants

 

Unsure as to why they advertise this, I noticed it as well. Although I don't have my FSM on me at work, I believe the OEM plugs (NGK's) that come in an evo are IGR7A-G (anyone, correct me if I am wrong). This number indicates a heat range of 7.

From what I gather, older 4G63'd DSM's run the heat range 6 plug and the evo was given a heat range 7 due to its elevated boost pressure compaired to these. Maybe Lancershop typo'd or got this mixed up?

 

OEM heat is 7, we reccomend NGK IX Plugs -- BPR7EIX -- as stock replacements.

 

http://www.ngksparkplugs.com/techinf...000&country=US

Here is some good reading.