To answer a question asked a few days back the link shows the difference between the UK standard plug on the right compared to the Japanese spec plug on the left.

 

The insulator nose is much shorter on the UK plug and hence is a cooler position than the Japanse spec plug, running the aformentioned on UK petrol leads to the plug possibly running too hot and possible detonation and/or misfire.

 

Having said that see many import zeds running fine on them, which is in part due to a good service levels but in the main charactoristics of each engine ..in my view anyway.

 

Jeff TT

Jeff,

 

Give us the NGK part numbers for each plug?

 

Mark

Thats no problem Mark

 

UK spec PFR6B-11C

 

Import PFR6B-11

 

 

Jeff TT

 

 

Just checked in the NGK manual and the symbols meanings are as follows:

 

P = Platinum

F = Thread size

R = Resister

6 = Heat range where 2 is the hotest and 14 the coldest

B = Design serial no.

11 = 1.1 mm gap setting

C = Special

Originally posted by TopLess

Jeff,

 

Give us the NGK part numbers for each plug?

 

Mark

 

Hi Jeff,

 

With regard to the above, sorry not in the habit of handing out orders on the forum!

 

There was an admin error by Nissan which detailed the PFR6B-11 as the correct plug for the TT Z, when in Fact it is the correct plug for a NA Z!

 

You are indeed right the right plug for a TT Z is the PFR6B-11C or -11B for a tuned Z, to quote TT.NET

 

The PFR6B-11(Non-turbo plug)is the same and sits too far in the head to make a proper spark. So as you can see unless you have had major head work you will need to stick with the Nissan PFR6B-11*B*.

If you were to de-cat a ZXTT, would the plugs no longer need to be platinum?

Hello Mate,

 

The only correctly designed spark plug for a tuned z is PFR6B-11B gapped to 0.92mm, available from America for about $50 a set. These are platignum, unfortunately irridium spark plugs are not manufactured in the correct physical proportions to correctly fit the TT Z's cylinder head!

This shows a PFR6B 11 vs a PFR6 11C