my god this is gonna take a while to read but seems like some good info.

will helfrauds sell the feeler guages to measure the corect gap?

Then tell "The American Chappie" to go direct to the Densoglobal site, and see that Denso themselves suggest VK20Y "Tough" or Non Iridium PK20PR-P8 the Octy vRS.

They do not show the IK20 for the Octy vRS.

Yes, they may be a little bit dearer, but you get what you pay for, and why get something like a set of plugs sent from America when "The Oilman" on here sells the same product from stock???

Interestingly, they show the gap as 0.8mm though :P

PS here's the link if anyone needs it.

Then tell "The American Chappie" to go direct to the Densoglobal site, and see that Denso themselves suggest VK20Y "Tough" or Non Iridium PK20PR-P8 the Octy vRS.

They do not show the IK20 for the Octy vRS.

Yes, they may be a little bit dearer, but you get what you pay for, and why get something like a set of plugs sent from America when "The Oilman" on here sells the same product from stock???

Gerry, the ik20 is shown for the audi TT which is a similar engine.

Reason i got mine from America is that they came in at about half the price they are listed from the oilman.I could not justify paying the extra for a tough plug when i prefer to change them frequently anyway.

At the end of the day its all down to personal preference

my god this is gonna take a while to read but seems like some good info.

will helfrauds sell the feeler guages to measure the corect gap?

Yes they do, BUT, be very careful if you gap them as the centre electrode is very thin.

Just do it very gently.

Interestingly, they show the gap as 0.8mm though :P

PS here's the link if anyone needs it.

I think they come at 1.1mm for normal aspirated engines. Turbos push more air in and have a tendancy to blow the spark out. I think thats why anyway.

@ Gerry would you say try them first at 0.8(VK20's) or gap them down straight away?

Gerry, the ik20 is shown for the audi TT which is a similar engine.

Reason i got mine from America is that they came in at about half the price they are listed from the oilman.I could not justify paying the extra for a tough plug when i prefer to change them frequently anyway.

At the end of the day its all down to personal preference

Sorry to be a kill joy, but if you follow the link that Nick has posted, and go to the Audi section, look up TT/TTS (8N3/8N9), it clearly shows all the 1.8 TT models as needing the PK20PR-P8 (Non Iridium) and the VK20Y's (Tough) as the correct plug, sorry, still no mention of the IK20's.

If your spark gap is too large, the boost pressure can blow out the spark.

Also, as Gerry says, be careful when regapping Iridium plugs - you can damage them and then the tip can actually fall out when hot, and then hole your piston!

@ Gerry would you say try them first at 0.8(VK20's) or gap them down straight away?

Cast your mind back to Marlins RR day, and I had just fitted the VK20Y's at the gap as supplied from the makers, and at 5100 revs (221BHP) on the RR, it started misfiring and pulled all the timing back.

Changed them back to the SVK20R-Z8's that I used to run at 6.5 gap to get home and no problems.

Gapped the new VK20Y's to 6.5 and no problems at all.

The VK20Y tough has now replaced the SVK20R-Z8's.

Just seems funny that although Denso themselves dont show the IK20 as the correct plug, people still fit them, and they are certainly not listed on the 2007 Densoglobal site as being correct for the Octy vRs or the Audi 1.8TT????

Sorry Gerry try the offical Denso site.

It clearly states IK20 for the TT.

Find My Part: DENSO Iridium

I think other sites list them in a cross-reference table. I only found the Denso site after I received them and wanted to know about gapping (I can't find the page I referred to for that, now. It wasn't the same as the link I posted above).

As Gerry says and from what i have read you can gap them down alot less than Denso state with no probs at all.

Cast your mind back to Marlins RR day, and I had just fitted the VK20Y's at the gap as supplied from the makers, and at 5100 revs (221BHP) on the RR, it started misfiring and pulled all the timing back.

Changed them back to the SVK20R-Z8's that I used to run at 6.5 gap to get home and no ploblems.

Gapped the new VK20Y's to 6.5 and no problems at all.

The VK20Y tough has now replaced the SVK20R-Z8's.

Just seems funny that although Denso themselves dont show the IK20 as the correct plug, people still fit them, and they are certainly not listed on the Densoglobal site as being correct for the Octy vRs or the Audi 1.8TT????

Thanks I'll gap them down then

Sorry Gerry try the offical Denso site.

It clearly states IK20 for the TT.

Find My Part: DENSO Iridium

Sorry, but that is a 2006 site, that does not even list Skoda cars, the one that Nick listed is the up to date 2007 Denso Corporation site, that lists as I have stated, and even list Skoda cars that the 2006 did not.

Do a Google search for Densoglobal, and it will take you to the 2007 site (Listed at the bottom of the page), look up the 1.8 Audi TT, and Octy vRS (AUQ) and you will even find Skoda on there, and no mention of IK20's in either Audi or Skoda.

Regardless of the ins and outs of the various websites, I think it might be safe to assume the IK20s work (well they do in my engine), but that maybe they will have a shorter life than the VK20Y, and therefore Denso prefer to recommend those. Gap is obviously a bit of an unknown, but it seems likely that 0.8mm (0.032" on the US site) or less is what's needed.

Sorry, but that is a 2006 site, that does not even list Skoda cars, the one that Nick listed is the up to date 2007 Denso Corporation site, that lists as I have stated, and even list Skoda cars that the 2006 did not.

Do a Google search for Densoglobal, and it will take you to the 2007 site (Listed at the bottom of the page), look up the 1.8 Audi TT, and Octy vRS (AUQ) and you will even find Skoda on there, and no mention of IK20's in either Audi or Skoda.

It sounds to me like the vk20y is a recent long life upgrade to come in line with the vag 40k service schedule.you should be able to use either as it is specified in the 2006 site for the tt .skoda is not listed as it is an american site.

According to the Denso site

Ik20= iridium power

vk20y=iridium tough

The OEM spark plugs (Bosch) only last about half the service interval, anyway...

oops double post

And to cap it all off, Mike at Impossible doesnt reccomend Iridium plugs.....

S2 plugs work fine in my 350+ Octy:P

Phil

So what's the general outcome of this thread for a remapped vRS?

I don't think mine have ever been changed @ 67k?

yeah im on 80k and there's no record of the plugs ever being changed!

im going with the 'if it aint broke dont fix it approach'!!

but if i ever do i'd get bosch. german engine. german plugs. makes sense in my tiny confused mind!

yeah im on 80k and there's no record of the plugs ever being changed!

im going with the 'if it aint broke dont fix it approach'!!

but if i ever do i'd get bosch. german engine. german plugs. makes sense in my tiny confused mind!

Seriously I would change those I changed mine on about 50k and the car fely so much smoother with the new ones in

HTH

I've got no documentation of mine ever being changed either after 67k.

So, back to my original question... which ones?

Ideally ones that don't have to have the gap changed

mate just get the OEM ones like i did as they dont have to be re-gapped and lets be honest £30 isnt going to break the bank now is it

or NGK BKR7E - 4 sets for £30 and they are easy to gap if they aren't correct already (0.8mm from memory as they come in the box)

(also available as BKR7E-11, same thing but gapped at 1.1mm)