Hello!
I need NGK sparkle plugs named PFR6B-11B for my Nissan 300ZX TT 90-mod. The
car has been modified/upgraded by Jim Wolf and therefore I need these
"colder"sparkle plugs. But, in Norway I can just find NGK-plugs named
PFR6B-11….Can I use these…? And what do the character "B" mean, at the
end of the sparkle plug name
Thanks for your help,
Anders
Hi Anders,
The U.S. owner’s manual says you can use PFR6B-11 in the TT, but I would not
recommend it. The "B" designation stands for "extended length." The TT
cylinder head is thicker therefore a longer plug is recommended (PFR6B-11B).
If you want to visually see the difference, then go here:
http://twinturbo.net/cgi-bin/ttnet_viewmsg.pl?forum=main&msg_id=73596...
=pfr6b11 , but you may have to register on that forum to see the message.
Cheers!
Michael.
"Anders Brunes" <conf…@online.no> wrote in message
news:Vdx89.12050$sR2.225338@news4.ulv.nextra.no…
- Hide quoted text — Show quoted text -
> Hello!
> I need NGK sparkle plugs named PFR6B-11B for my Nissan 300ZX TT 90-mod.
The
> car has been modified/upgraded by Jim Wolf and therefore I need these
> "colder"sparkle plugs. But, in Norway I can just find NGK-plugs named
> PFR6B-11….Can I use these…? And what do the character "B" mean, at the
> end of the sparkle plug name
> Thanks for your help,
> Anders
BTW, you can order PFR6B-11B from:
http://www.courtesyparts.com/Merchant2/merchant.mv?Screen=PROD&Store_...
&Product_Code=22401-000026
Michael.
"Anders Brunes" <conf…@online.no> wrote in message
news:Vdx89.12050$sR2.225338@news4.ulv.nextra.no…
- Hide quoted text — Show quoted text -
> Hello!
> I need NGK sparkle plugs named PFR6B-11B for my Nissan 300ZX TT 90-mod.
The
> car has been modified/upgraded by Jim Wolf and therefore I need these
> "colder"sparkle plugs. But, in Norway I can just find NGK-plugs named
> PFR6B-11….Can I use these…? And what do the character "B" mean, at the
> end of the sparkle plug name
> Thanks for your help,
> Anders
Some Dyno testing was done recently in Australia, doing a comparison between
the 2 plugs.
It was found that the PFR6B-11B actually produced 20hp LESS than the
PFR6B-11
Sorry I haven’t got any hard data to back up this claim.
Several people in Aust believe that the PFR6B-11B were actually made to help
the Zed meet US emmisons.
Far better bet is to use the Iridium alteritive to the PFR6B-11
Andrew G
Michael Doan <mdoan…@hotmail.com> wrote in message
news:2ly89.186614$sA3.249644@rwcrnsc52.ops.asp.att.net…
> Hi Anders,
> The U.S. owner’s manual says you can use PFR6B-11 in the TT, but I would
not
> recommend it. The "B" designation stands for "extended length." The TT
> cylinder head is thicker therefore a longer plug is recommended
(PFR6B-11B).
> If you want to visually see the difference, then go here:
http://twinturbo.net/cgi-bin/ttnet_viewmsg.pl?forum=main&msg_id=73596...
- Hide quoted text — Show quoted text -
> =pfr6b11 , but you may have to register on that forum to see the message.
> Cheers!
> Michael.
> "Anders Brunes" <conf…@online.no> wrote in message
> news:Vdx89.12050$sR2.225338@news4.ulv.nextra.no…
> > Hello!
> > I need NGK sparkle plugs named PFR6B-11B for my Nissan 300ZX TT 90-mod.
> The
> > car has been modified/upgraded by Jim Wolf and therefore I need these
> > "colder"sparkle plugs. But, in Norway I can just find NGK-plugs named
> > PFR6B-11….Can I use these…? And what do the character "B" mean, at
the
> > end of the sparkle plug name
> > Thanks for your help,
> > Anders
Actually, PFR5B-11B is the standard plug for the TT here in the U.S (may be
different elsewhere). Many, including myself, recommend a colder range plug,
such as PFR6B-11B, as a preventive measure for detonation if your TT has
many modifications (mainly, increased boost). And the reason for doing so is
that a colder range plug will remove heat from the cylinder quicker
(detonation likes heat). Unfortunately, the downsides to using a colder
range plug are: plug fouling if the cylinders do not reach the spark plug
self-cleaning temperature, possible misfire, and possible slight hp loss
(20hp is a stretch, however).
However, back to the "B" designation. Like I said, the "B" designation
denotes "extended length" and that allows the plug to seat in the TT heads
properly. If you take a look at the thread I posted and observe the
pictures, then you will notice that the plug tip is further back in the TT
heads w/ PFR6B-11 plugs. The location of the spark (in relation to the heads
and moving pistons) may ultimately affect how the engine runs.
In regard to emissions, that is the catalytic converter’s primary function.
U.S. TT’s are equipped w/ 2 pairs of catalytic converters: a set of pre-cats
to meet cold start emissions and a set of main cats to meet regular
emissions. Running a colder range plug might affect emissions if it does not
reach the self-cleaning temperature.
In regard to iridium plugs, iridium-tipped electrodes will outlast
platinum-tipped electrodes (iridium is denser than platinum);
platinum-tipped electrodes will outlast copper electrodes (platinum is
denser than copper). But consider this: copper is the best conductor of all
the 3. If you want the most reliable power, then I recommend using copper
plugs. You just have to change them more frequently (i.e. every 15k miles),
but frequent spark plug changes is something I would recommend for a sports
car anyway.
Michael.
"Andrew G" <nos…@for-me.com> wrote in message
news:2IH89.23$sl2.5265@nsw.nnrp.telstra.net…
- Hide quoted text — Show quoted text -
> Some Dyno testing was done recently in Australia, doing a comparison
between
> the 2 plugs.
> It was found that the PFR6B-11B actually produced 20hp LESS than the
> PFR6B-11
> Sorry I haven’t got any hard data to back up this claim.
> Several people in Aust believe that the PFR6B-11B were actually made to
help
> the Zed meet US emmisons.
> Far better bet is to use the Iridium alteritive to the PFR6B-11
> Andrew G