What's a goof place to siurce sparks plugs at sensible prices and are irridium plugs any good for an essentially unmodified ancient TT

Yep, I know I can't spell :)

Watching & waiting - as i want plugs too.

 

harve

Try RobH i think he can get Iridium plugs for about £50

All the best Sid

I'm just about to put an order in from a guy in the US. Should have some within the week.

 

NGK Iridium IXs. I put 'em in mine and thought they were great. Big improvement, especially if you're not already using Platinum plugs.

 

£50 including Special Delivery.

 

LMK if interested.

Definitely interested. When, payment, etc , etc?

I'll have a reply tomorrow hopefully, US time delay means I've gone home by the time my supplier gets round to answering. I normally receive them within three days and can send them out the next day. A week or so in total I guess...

 

Cheers!

 

RobH

Originally posted by RobH

NGK Iridium IXs. I put 'em in mine and thought they were great. Big improvement, especially if you're not already using Platinum plugs.

 

zeds have platinum tipped plugs as standard, so you really shouldnt be using anything less!

 

speaking to the tech guys at NGK, they said the plat tipped plugs would be better than the Iridium ones anyway :confused: so i kept with the Platinum ones.

Originally posted by Paul C

speaking to the tech guys at NGK, they said the plat tipped plugs would be better than the Iridium ones anyway :confused: so i kept with the Platinum ones.

 

Did they give a reason or explanation?

 

Tim

Been looking into this quite a bit recently as I figured you should go a grade colder (ie 7) if you're running higher boost etc. NGK say one grade for every additional 50-100bhp as a guide.

 

Problem is that for the TT the correct plug is PFR6B-11B (platinum) it is ONLY available in 5 or 6 rating and the 6 is now discontinued. On this plug, the "B" on the end means this is a special design where the electrodes protrude further into the chamber than normal. The difference is quite significant apparently.

 

There is NO NGK alternative plug in the iridium range that has this type of firing tip. The BKR7EIX-11 is the closest match apparently or BPR7EIX-11, but I haven't been able to find that listed anywhere.

 

Apparently the next best to the PFR6B-11B is an NGK japanese copper plug which you can get from Ginn in the US. I'd guess being copper you'd have to change them more often and use a smaller gap due to the larger electrode diameter producing a less powerful spark. The protrusion is supposed to be the closest to the 11B that's available. I havent been able to get a part number.

'Kin'ell :( >>So which ones do i get then confused:

Running 12 psi,

80mm filter,

& bag of chips soon ;)

 

:confused: ..........harve.............:confused:

Hi Matey,

 

PFR6B-11B is about the best plug for a modded Z, courtesy Nissan still have a stock of them, here is all the information you could want about them!

http://203.79.125.146:10085/nz300zx/technical/sparkplugs.htm

 

http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=600120

 

http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=633031

 

http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=633204

 

http://twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=633441

 

Mark

Cheerz Mark.

 

harve

I'm even more confused.

 

Apart from the obvious, what is the difference between the Iridium plugs and Platinum Plugs?

LOL - I guess the only proof of the pudding etc...

 

All I can say is that Iridiums work very well for me. Whoever had my car before me had some god awful copper or nickel tipped things in it. NGK and their resellers claim HP increases over plats. A mate of mine reckons that Iridium only comes from outer space - sounds like a piss take but apparently it's only found on meteors etc - LMAO!

 

John, I reckon I can get the BKR7EIX-11 from my supplier. You'd have to have some pretty serious mods to need a grade colder in Iridium IMHO though.

 

Posidrive, the difference is mainly the material that the central electrode tip is made from. A harder material allows it to be more precisely manufatured without having it melt so easily. Sparking in the right place on the tip and at the right time improves efficiency and therefore performance, economy etc. Also allegedly reduces detonation through improved spark timing, requires less voltage so preserves battery, loom and alternator...

 

Cheers!

 

RobH

Rob,

Spoke to NGK some more and reckon I'm just going to stick to a 6 grade for now. For some reason the US standard plug is a 5, UK is a 6. As my mods are just ECU and boost controller a 7 may be a bit OTT.

Do you reckon your supplier could get PFR6B-11B?

The number for the copper plug is ZFRxF-11 if anyone's interested.

The plugs I usually get are a BKR6-11EIX which is the PFR6-11B equivalent. Got some on the way.

 

I'm not sure why they run a hotter plug in the states as standard. I did think it was because they had a higher grade of fuel so they could get away with it without detting but I've been told theirs is worse than ours (low RON). Maybe something to do with emissions??

 

NGK don't really sell Iridiums in this country. I think they'll introduce them gradually but aimed more at 4x4s initially :-\

 

Can't see any advantage of paying out double for HKS plugs. I'm convinced HKS won't be making their own, just getting NGK or more likely Denso to rebadge for them.

 

Cheers!

 

RobH

Just to let you know John, courtesey have PFR6B-11b in stock, mine arrived today!

 

Mark

Cool, cheers Mark

Just for your info they should be gapped to 0.92mm, any smaller and you will have trouble idling, any bigger and the spark gets blown away by the rush of pressurised air!

 

Mark

All I can say is that Iridiums work very well for me. Whoever had my car before me had some god awful copper or nickel tipped things in it. NGK and their resellers claim HP increases over plats. A mate of mine reckons that Iridium only comes from outer space - sounds like a piss take but apparently it's only found on meteors etc - LMAO!

 

Well, iridium is relatively common in asteroids but the most common source right now is good old seawater and iridium itself aint that hard really but the alloy used for spark plugs is the next best thing to a refractory oxide except that it conducts! (melting point of over 3000K......as an aside of course....

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