This is probably an obscenely basic question but I don't want to end up with a bunch of plugs that I can't use. When I search for BRK7E is that enough to specify which plug I want or are there different thread sizes/diameters, etc?

Also, I'm probably going to order 5-6 sets for tuning. Where can I find them the cheapest?

 

You don't need 5-6 sets for tuning.. that's a bit overkill. One set will do

Here's what you need to go by for the NGK part. But there is also a stock number


then purchase here:
http://www.sparkplugs.com

 

I'm planning on doing several tuning sessions as I test some things out so I'll probably need to order more at some point. From what I've heard you're supposed to put in a new set of plugs and then do a pull on the dyno or the street and then shut off the motor and let it wind down and then take out the plugs.

 

that's an old school way to look for detonation and rich/lean conditions

now a days you use a wideband

have a chat with your tuner of choice about what you need and what he will do

 

your local part stores should carry them at 1.99 each

ask for 95 audi s5 or s6 spark plugs.

 

4644 is the part number i believe

 

how much are people boosting on these? when should 8s go in?

 

i switched from 7s to 8s at about 450whp on 10:1 compression and noticed a little bit of a difference. im sure that number is arbitrary but it gets you thinking

 

I am the tuner. I wrench and tune my own ****. Looking at plugs can give you insight about timing.

 

After I've finished tackling the corners of Akina in my WRX STi 22B, I sometimes need to replace my plugs.

I've found that NGK BKR7E11 or BCPR7ES are basically the same plug except the BCPR has a slightly larger connector to the plug wire.

Amazon or Ebay are usually cheapest.

Happy Drifting!

 

its always been my understanding that when the mark on the heatstrap gets past 3/4's of the way then you are ready for the 8's
my car is on the verge of needing 8's in it at 22 psi

 

^ i know this, but on average what power is that? and how do you do a plug test on a turbo car you would have to wait 2-5mins idling before shutting down instead of a wot/shut down plug check which is dead relaible

 

4554's are the 8's you want to run. From my research all the tuners love em and they fixed my break up issues.

 

Yes they helped me run better on my higher boost pump gas. I was seeing some small evidence of detonation on the 7s, the 8s are clean on the porcelain

 

Those are non-resistor type not a good idea if using the stock ecu for tuning, not sure if it effects standalone stuff.

 

I use the 7173 stock number NGKs. they are a resistor type 8

 

links would help for what plugs to order I need to tune between 240-300hp for now. All I have ever ran was a bkr7e-?

 

you'll be fine with the 7s. 4644 is the part #

 

have a nice day

 

You can also use Champion 344 plugs, they are the same as the NGK BKR7E plugs.

 

We use bcr8es, great results to over 500who and cheap as chips

 

http://en.wikipedia.org/wiki/Spark_plug#Heat_range

Understanding heat range is important. You can run a range of plugs in a motor and they will work, and they will not affect power output of a motor (if all other parameters are equal)

Run too hot of a plug and you can cause pre ignition...run too cold of a plug and it will not self clean well and you could be changing your plugs frequently.

Also if you like to read plugs while tuning (on the dyno, at the track etc) then they will at least need to be close to a proper heat range in order to be read properly

 

ok bump where is the cheapest place to buy these online! I need atleast 12