Remember this part number, live by it, use it: NGK BPR6ES. If you upgrade to a bigger turbo NGK BPR7ES.

I use bpr8es's but if I were you I'd run bpr7es's. The bpr6es part number at advance 7131, I can't remember the number for the 7's or 8's for some reason.

what about BP7ES (no R) Have some of these that I haven't put in yet.

Cant say I've used them. The bpr6es is supposed to bo factory heat range. Bpr7es is a step colder, 8 would be two steps colder. You really dont need to go colder than the bpr7es unless you have a good sized turbo and a lot of boost.

The lack of the R means that they're not a resistor type plug. Try to exchange them for a BPR7ES.

"11's" are for NT motors since they run a gap at .044" and will snuff out in a quick in turboed, high compression arrangements.


NGK-BPR6ES plugs. Shoot, even Honda uses BPR6ES plus in their motors to run their stationary power generators along with their OHV lawnmowers.

Excuse my retardedness but resistor type and non resistor type, whats the main difference? I mean what is the purpose of the resistor type.

Resistor plugs keeps the ignition noise from going into your radio antennae-why you also use carbon core plug wires.

At the moment the spark jumps the gap it causes a high frequency burst of energy, this is known as RFI (radio frequency interference). This is why resistor spark plugs were introduces in the mid 1960's. Placing a resistor within the spark plug suppresses the RFI. Without resistor plugs in your car you can experience static on your radio as well as interference with other sensitive electronic equipment. Some later model vehicles must use resistor plugs for a proper "talkback" to the electronic ignition.

In the olden days, car radios were of the old tube type that wasn't that all sensitive to RFI radiation. But, as quoted above in the 1960's when transistor radios became the norm, RFI was their worst enemy since when 6 or 8 sparkplugs were firing in their sequence, you'd hear it in when you had your radio on as a horrible whine.

There was an alternative when one would use non-resistor plugs was to put a resistor in the main coil wire. You'd cut the coil wire and thread in a resistor inbetween the cuts. And, when one would use copper wire plug wires, you had to do the same to remove the RFI interference with the resistor trick.


Use to be when someone is mowing a yard next door, when the lawnmower would pass by a TV set that is against the outside wall, the screen would go crazy due to RFI interference from that lawn mower's spark plug setting off nasty RFI's.

Now you know .... good luck-DSM

DSM1G90 said:

Now you know ....

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And knowing is half the battle!!

anyone know if these are the correct plugs from Napa-
http://www.napaonline.com/Search/Detail.aspx?R=NGK7131_0275437292

jp91gsturbo said:

Remember this part number, live by it, use it: NGK BPR6ES. If you upgrade to a bigger turbo NGK BPR7ES.

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^^ Couldn't have said it better myself!

mattspyder said:

anyone know if these are the correct plugs from Napa-
Store Locator | NAPA Online

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Your link isn't coming up with anything.

Sorry, put the wrong link in there. Link has been updated-

Listen to the guys in here and stick with the NGK BPR6ES, BPR7ES or BPR8ES.

Mike

euphoria said:

I use bpr8es's but if I were you I'd run bpr7es's. The bpr6es part number at advance 7131, I can't remember the number for the 7's or 8's for some reason.

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I checked advanced auto parts for this part number and they didn't have it. Don't think 7131 is it. Napa has that part number for a NGK plug, I posted the link above as well-

You can ask the counter salesman at NAPA, or any parts store for the direct plug catalog number instead of their part number ..

mattspyder said:

I checked advanced auto parts for this part number and they didn't have it. Don't think 7131 is it. Napa has that part number for a NGK plug, I posted the link above as well-

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7131 is the part number for the NGK BPR6ES copper plugs (the ones that you need) at Auto Zone.

Hope this helps!

I would go with the BPR7ES, that is what I am using in my car. That is also the spark plug that most dsm'ers around me use. Rather it be stock or 50trim.

That is also the spark plug that most dsm'ers around me use

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What motors do they have then? 7bolts??

..but 7's are too cold for stock trim...unless the owners are winding the motor up to red line per each gear shift.... otherwise, they're fouling out all the time with carbon deposits on them since the 6 bolt turbo motor has a lower compression ratio than the 7bolt turbo motor..

turbo laser said:

I would go with the BPR7ES, that is what I am using in my car. That is also the spark plug that most dsm'ers around me use. Rather it be stock or 50trim.

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Thats like saying that most of the DSMers around me are running 25 psi, so I should crank mine up even though I've got a 14b while they have 20gs. Do what is best for your setup, not what everyone else is doing.

I posted this in a similar thread yesterday:

9!'clipseDOHC said:

As a general rule, stick with the NGK BPR6ES copper plugs until you are running a larger turbo, then switch to the colder NGK BPR7ES copper plugs. If you have an EGT gauge and your temps don't go down after switching to the colder plug then it's probably not helping you and you could get the side effects of low RPM misfires and poor off boost response. In which case, go back to the BPR6ES plugs.

Hope this helps!

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If all the DSMers in your area are all running bigger turbos then that's great, they will benefit from using the colder "7"s. Otherwise you are setting yourself up for poor off-boost performance just so you can use "cool" (think about it) spark plugs.

I use bpr7es on my 57 trim 20psi, n I love it!

Oh yeah never ever ever use iridium!