anyone know if NGK PFR6B-11B can be bought in uk all searches end up in USA

 

dan :tongue_smilie:

I seem to recall the PFR6B-11B was a specialist plug made for the U.S 300zx, and I thought was discontinued now.

 

Previous thread from JeffTT :

 

PFR6B -11C UK spec plug

 

PFR6B-11 ( without the C ) are fitted as stock to Jap import TT and Non turbo for use in Japan.

 

Jeff

 

I believe the B are a slightly cooler plug, but harder to get in the UK.

 

You are running Hybrid turbos with increased boost ?

Edited July 21, 20168 yr by Yowser

I seem to recall the PFR6B-11B was a specialist plug made for the U.S 300zx, and I thought was discontinued now.

 

you may well be right but wanna do a service and those are the plugs fitted and all searches end up buying from USA

 

dan.

Z1 then! :confused1:

 

dan.

Our club trader sells them

 

http://www.opieoils.co.uk/p-64096-ngk-sparkplug-platinum-spark-plug-pfr6b-11-ngk-4014.aspx

http://www.opieoils.co.uk/pv-79730-ngk-sparkplug-platinum-spark-plug-pfr6b-11c-ngk-2684-set-of-6.aspx

Our club trader sells them

 

http://www.opieoils.co.uk/p-64096-ngk-sparkplug-platinum-spark-plug-pfr6b-11-ngk-4014.aspx

http://www.opieoils.co.uk/pv-79730-ngk-sparkplug-platinum-spark-plug-pfr6b-11c-ngk-2684-set-of-6.aspx

 

ok thanks may give the NGK PFR6B-11C a try instead of the PFR6B-11B as so hard to get over here

 

dan.

ok thanks may give the NGK PFR6B-11C a try instead of the PFR6B-11B as so hard to get over here

 

dan.

 

If your engine is 100% stock, then they're 'ok'. They're a fairly standard plug design and I personally wouldn't use them again. Those plugs were the old recommended plugs when Nissan and NGK had a corporate agreement in place to use those specific plugs, they may still do.

 

Modern iridium plugs, if correctly selected, are better and run cooler which are much better for Zs with any upgrades.

 

BKR7EIX Iridium plugs are what I use. The PFR6B-11B is not a cold running plug, nor is the 'C' denoted plug, indeed I thought that plug had now been discontinued, needless to say it was a plug fitted for longevity which is why it is noted as such in Nissan service manuals. The iridium plugs won't last as long, but for a cheap item that gives a cooler tip, it's a better solution.

If your engine is 100% stock, then they're 'ok'. They're a fairly standard plug design and I personally wouldn't use them again. Those plugs were the old recommended plugs when Nissan and NGK had a corporate agreement in place to use those specific plugs, they may still do.

 

Modern iridium plugs, if correctly selected, are better and run cooler which are much better for Zs with any upgrades.

 

BKR7EIX Iridium plugs are what I use. The PFR6B-11B is not a cold running plug, nor is the 'C' denoted plug, indeed I thought that plug had now been discontinued, needless to say it was a plug fitted for longevity which is why it is noted as such in Nissan service manuals. The iridium plugs won't last as long, but for a cheap item that gives a cooler tip, it's a better solution.

 

Also sold by our trader :)

 

http://www.opieoils.co.uk/p-63603-ngk-sparkplug-iridium-ix-spark-plug-bkr7eix-ngk-2667.aspx

Oh dear the old Iridium plug debate ! this has been dealt with so many times over the years , iridium plugs DO NOT SUIT large relative low revving engines as they have poor cleaning property. Iridium plugs are best left for 2.0 litre high revving engines, near on twenty years of been around zed engines has proven to me that the stock plug is the BEST option, the tickover has a perceivable miss when iridium plugs are used, in fact both me and Jamie could tell if they were fitted just by the way the engine would tick over and sound.

 

After years of saying this I eventually cornered a tech from HKS at the Auto-sport show who agreed with me and actually said just because they appeared on the application fitting list did not mean they were actually well suited.

Edited March 9, 20187 yr by JeffTT

Tell that to Jaffa who's running 700hp+ and plenty of others around the world running high end builds! :)

 

My Z runs just as well for example and regular plug inspection tells me they're doing just fine.

Edited July 22, 20168 yr by Funkysi

My engine power is 580 and in fact since it was forged in 2015 is running incredibly incredibly well the 1200 miles since.

 

Plugs i have currently are BKR7E.

 

I have also used in the not to distant past without issue BKR8EIX.

Tell that to Jaffa who's running 700hp+ and plenty of others around the world running high end builds! :)

 

My Z runs just as well for example and regular plug inspection tells me they're doing just fine.

 

If your running 700 bhp then it is hardly a standard engine ? in fact been so far removed from the original design parameters then nothing can be taken from the spec of those engines and applied to lessers zeds.

 

As far as running a zed as a daily or even a regular weekend car then iridium plugs would soon enough show out as not fully suitable, occassional use with long time parked up gives false results on any reliability factors as well as suitability. Way too much motor sport hype exists in after market car parts, all sorts of kit that is only suitable for track cars with no place on road cars but the hype and spin of claimed performance improvements is what propergates the market.

Of course the real problem with after market parts be it plugs or suspension parts they are almost certainly fitted after taking old worn items off, the comparison then is flawed, fit a set of brand new stock plugs to an engine and it will better, of course they are new and have not started to degrade.

 

If Nissan concluded the platinum plugs were the way to go then with the invested research they would have done then thats indictive of a good call, personally never seen a zed engine in stock or slightly modded form run better with iridium plugs, in fact on the contrary. Listen to the tick over its just not on song with the wrong plugs.

Edited July 22, 20168 yr by JeffTT

Spark plugs have always been a can of worms and owners not sure which ones to put into there Z. Mine will be coming out soon and as I have never changed the plugs in this red swb it will be interesting to see what plug I have fitted.

I buy my plugs from ASC Group off ebay. For me it's cheaper to get plugs shipped from UK then buying them in Norway :-))

thanks for replies think gonna stick with the NGK PFR6B-11B been using them in my Z (which is not stock) for few years now without any real issues, i bow to all your knowledge which is greatly appreciated :thumbup1:

 

dan :tongue_smilie:

thanks for replies think gonna stick with the NGK PFR6B-11B been using them in my Z (which is not stock) for few years now without any real issues, i bow to all your knowledge which is greatly appreciated :thumbup1:

 

dan :tongue_smilie:

 

Ok near enough at least your staying away from the hateful iridium plugs, as a final reference to them the NGK Iridium BKR7EIX application list shows as fitting the Nissan 300zx 90-96 Z32, a simple cross reference on the application it also shows as fitting the 2002-2005 Subaru WRX 2.0L how can that be right ??

 

Jeff

I have used PFR6B-11B for 10 years running 14-15 psi and I never had a problem with the engine ...still running strong

There are a few options for the TT guys.

 

BTW the PFR6B-11C is shorter than the PFR6B-11B by 1 mm.

PFR6B-11C

PFR6B-11B

 

Left is the Yttrium triple ground electrode Brisk Extra Turbo Racing DOR15YTE-1

Middle is the Brisk Silver Racing DOR15YS

Right is OEM TT spark plug

 

Here is a standard projection NGK iridium VS the Brisk Silver:

 

The factory has 19mm reach as does the Brisk.

The Brisk has 3mm shell so it is 22mm projection into head.

 

The OEM PFR5B-11B has a 3.5mm shell for a 22.5mm projection into head.

From NGK:

PFR5B-11B

X = 50.5mm (ISO)

Y = 6.5mm from last thread to center electrode top

Z = 3.5mm Metal Shell projection

 

Measurements

 

PFR5B-11B Platinum

• Length from top to shell end - 73.03 mm
  
• Length from top to electrode end - 78.59 mm
  
• Full Reach - 22.53 mm
  

 

 

DOR15YS Silver

• Length from top to shell end - 72.45 mm
  
• Length from top to electrode end - 77.31 mm
  
• Full Reach - 22.03 mm
  

 

 

DOR15YTE-1 Yttrium triple electrode

• Length from top to shell end - 72.28 mm
  
• Length from top to electrode end - 77.40 mm
  
• Full Reach - 22.03 mm
  

 

 

SKJ20DR-M11 Denso

• Length from top to shell end - 70.14 mm
  
• Length from top to electrode end - 77.08 mm
  
• Full Reach - 20.64 mm
  

 

 

BKR7EIX-11 Iridium

• Length from top to shell end - 70.03 mm
  
• Length from top to electrode end - 75.98 mm
  
• Full Reach - 19.03 mm
  

 

 

Here are the measurements of the 2 new Denso spark plugs:

 

PK20GR8 Denso (3326) - Pics included

• Length from top to shell end - 72.50 mm
  
• Length from top to electrode end - 78.75 mm
  
• Full Reach - 22.03 mm
  

 

 

SK20BGR11 Denso (3472)

• Length from top to shell end - 72.28 mm
  
• Length from top to electrode end - 79.15 mm
  
• Full Reach - 22.00 mm
  

 

 

 

 

There are a few options for the TT guys.

 

BTW the PFR6B-11C is shorter than the PFR6B-11B by 1 mm.

PFR6B-11C

PFR6B-11B

 

• Left is the Yttrium triple ground electrode Brisk Extra Turbo Racing DOR15YTE-1
  
• Middle is the Brisk Silver Racing DOR15YS
  
• Right is OEM TT spark plug
  

 

 

Here is a standard projection NGK iridium VS the Brisk Silver:

 

The factory has 19mm reach as does the Brisk.

The Brisk has 3mm shell so it is 22mm projection into head.

 

The OEM PFR5B-11B has a 3.5mm shell for a 22.5mm projection into head.

From NGK:

PFR5B-11B

X = 50.5mm (ISO)

Y = 6.5mm from last thread to center electrode top

Z = 3.5mm Metal Shell projection

 

Measurements

 

PFR5B-11B Platinum

• Length from top to shell end - 73.03 mm
  
• Length from top to electrode end - 78.59 mm
  
• Full Reach - 22.53 mm
  

 

 

DOR15YS Silver

• Length from top to shell end - 72.45 mm
  
• Length from top to electrode end - 77.31 mm
  
• Full Reach - 22.03 mm
  

 

 

DOR15YTE-1 Yttrium triple electrode

• Length from top to shell end - 72.28 mm
  
• Length from top to electrode end - 77.40 mm
  
• Full Reach - 22.03 mm
  

 

 

SKJ20DR-M11 Denso

• Length from top to shell end - 70.14 mm
  
• Length from top to electrode end - 77.08 mm
  
• Full Reach - 20.64 mm
  

 

 

BKR7EIX-11 Iridium

• Length from top to shell end - 70.03 mm
  
• Length from top to electrode end - 75.98 mm
  
• Full Reach - 19.03 mm
  

 

 

Here are the measurements of the 2 new Denso spark plugs:

 

PK20GR8 Denso (3326) - Pics included

• Length from top to shell end - 72.50 mm
  
• Length from top to electrode end - 78.75 mm
  
• Full Reach - 22.03 mm
  

 

 

SK20BGR11 Denso (3472)

• Length from top to shell end - 72.28 mm
  
• Length from top to electrode end - 79.15 mm
  
• Full Reach - 22.00 mm