NGK spark plugs

[jflo]

okae, it's been about 3-5K miles since i changed my plugs, and recently, i'm getting a lot of backfire. i'm wondering which plugs i should get, the BKR7Es again or those platinum ones by NGK ZRF11 or something ? i turned down the boost to reduce spiking, but still get to about 9.5 or so...and still get backfire. does the hot weather have anything to do with it ?

[MikeyG_U2]

Take your pick.

http://www.msprotege.com/forum/showpost.php?p=836836&postcount=71

[I'm Allen]

Right now I'm using the Denso KJ22CR-L8 and they are awesome. I was using the BKR7E and was getting a lot of hesitation...more than the normal.

Allen-

[t3ase]

Thread moved to MSP Engine & Performance.

[jflo]

hmm...those denso plugs seem the right choice...how much did you get them for allen ?

[jflo]

help please ! need to find a place where they don't charge 6 bucks for shipping

[jflo]

come on ! someone has to know a place other than sparkplugs.com (http://www.sparkplugs.com)

[KyRaceFan]

I like the denso iridium IQ20's. IK20's would also work.
No misfires, and smoother than the BKR7e's. Theyre a little expensive but iridiums are the best, and they wont need to be replaced for a long long time.

[jflo]

are the IQ20s the colder range ?

[KyRaceFan]

20's are stock heat range.

[jflo]

okae...well, i found out the difference between the two...one of them is japanese industry standard length, and the other is ISO...but they're $11.99 each...which isn't exactly a bargain. but that's what ebay's for right ? i found 4 IK20s for 34.99...+shipping should come out to about 40-45. sparkplugs.com wants 6.85 for shipping ?!?!? damn..

[KyRaceFan]

gotta love ebay.
But seriously, these things should last 20-30k miles.
So the extra cost is worth it.

[jflo]

how important is gap when it comes to spark plugs ? the IK20s have a .44" gap, while the KJ22CRL8 have a .032" gap (stock plug gap). and the node on the iridium ik20s would probably break if i gapped them to .032" (and that's a huge difference from .44" to .032")

[BlkZoomZoom]

I def. don't reccomed the NGK ZRF11, I have never had such a lull in the powerband then when I used them (gapped @ .32). I think I will be switching back to the bkr7e's, they seem to habe worked the best for my car. Right know I'm running stock plugs gapped @ .30

[jflo]

wait, so are they gapped to .32" or .032" ????

[KyRaceFan]

im sure he meant .032.

I was told not to worry about the gap on my iridiums, but i'll double check them anyways. :)

[jflo]

hmm...okae. i guess i'll get those IK20s off of ebay then