NGK Extended Reach Spark Plugs

[igdrasil]

I just got the ZFR7F-11 for 2.75 each @ western auto (advanced auto parts)

I think is a good price...we will see how it goes

 

[boostaddict]

Don't know if the price is any good but you can get them here:

http://www.clubplug.net/canada/retail_complete_ngk.html

There's both Canadian and US sites also so nobody'll have to waste the time and money on border crossings.

 

[YP5 Toronto]

Don't know if the price is any good but you can get them here:

http://www.clubplug.net/canada/retail_complete_ngk.html

There's both Canadian and US sites also so nobody'll have to waste the time and money on border crossings.

Great site!!! this link ROCKS! $39.00 CAD for a box of 10...sweet (but do I need 10?)

 

[YP5 Toronto]

Sorry for the newb question, but what is the difference between these three plugs? (I am assuming that they are different temps?)

ZFR5J-11
ZFR6E-11
ZFR7F-11

 

[LinuxRacr]

Sorry for the newb question, but what is the difference between these three plugs? (I am assuming that they are different temps?)

ZFR5J-11
ZFR6E-11
ZFR7F-11

The heat ranges are the difference. 5 is the hottest, while 7 is the coldest. The -11 at the end of each part number is the gapping (1.1mm).

 

[igdrasil]

The heat ranges are the difference. 5 is the hottest, while 7 is the coldest. The -11 at the end of each part number is the gapping (1.1mm).

ZFR7F-11

Z = Extended Gap (reach)
F = 19mm reach
R = Resistor type
7 = cold plug
F = Special Design (Firing end construction)
-11 = pregapped @ .44" (1.1mm)

 

[Mental Addiction]

We are using BKR7E-11's and ZFR7F-11 plugs right now.We are going to do a dyno comparison in the next week..We sell them for $19 shipped.

 

[LinuxRacr]

Thanks for clearing that up! The only thing I want to touch on is the -11. If you look at a gapping tool (which I am looking at right now), and the ZFR7F-11 plug (which I am right now) and measure (which I am right now), you will see that the gapping is .043-.044 inches, not mm. That converts to 1.1 mm.

 

[Kooldino]

We are using BKR7E-11's and ZFR7F-11 plugs right now.We are going to do a dyno comparison in the next week..We sell them for $19 shipped.

Awesome! Can't wait to see the results.

 

[Little Beavis]

Yes, I'd love some results that show a gain / loss / or no change from changing plugs. Of course the dyno won't show a change in idle, or smoother operation. . .

 

[igdrasil]

Hmmm

I think the .44 gap is too wide isnt it? That gap is doubled compared to my current Sparks

 

[LinuxRacr]

I always re-gap them to .035. I think you should be able to get them with the pre-gapping you need though. I think instead of the -11 on the end, the number would be something lower...like -88 or -89 on the end of the part number.

 

[igdrasil]

yeah well, I installed them with the gap as is..

so, we will see.

 

[acidbug]

Always try to gap mine at .032!

Chas

 

[ZoomZoomH]

not directly associated w/ the findings here, but Edwin (aka TheMan) has also found that the ZFRxF-11 plugs improve NA FS and FP engine performance as well!

http://www.clubprotege.com/forum/showthread.php?t=4627&page=1&pp=15

turns out the ZFRxF plugs are in fact OE-spec plugs for Japanese market FS and FP engines! (hotter plugs for NA application of course)

 

[LinuxRacr]

not directly associated w/ the findings here, but Edwin (aka TheMan) has also found that the ZFRxF-11 plugs improve NA FS and FP engine performance as well!

http://www.clubprotege.com/forum/showthread.php?t=4627&page=1&pp=15

turns out the ZFRxF plugs are in fact OE-spec plugs for Japanese market FS and FP engines! (hotter plugs for NA application of course)

Hahaha! So he finally put it out there in the thread huh? We were talking about this about a week and a half ago. I was like, welcome to the party man...

 

[YP5 Toronto]

OK.... I picked up a set of

ZFR5F-11 (extended reach)

And

BKR5E-11

I need the "hotter" versions, as colds starts are more of an issue in Toronto. Plus I run 94 octane and lower compression, so I am not as concerened about detonation at 8psi.

Question.... the ZFR5F-11 and the ZFR5J-11...what is the difference?

 

[igdrasil]

OK.... I picked up a set of
Question.... the ZFR5F-11 and the ZFR5J-11...what is the difference?

Special Design (Firing end construction), but the NGK whitepaper does not specify what is it...

 

[YP5 Toronto]

I think the F is for the "Patented 90 degree V-Groove design for increased ignitability".

So....is the V-Groove good, bad or indifferent when we talk about FI?

 

[Equinox]

I think the F is for the "Patented 90 degree V-Groove design for increased ignitability".

So....is the V-Groove good, bad or indifferent when we talk about FI?

the V groove is a try at a higher performance plug, but really it just means you are paying more for them