Accuspark

[MrSpeedy]

The merits of Accuspark ignition kits have been pretty well documented on these fair pages, but what of their spark plugs?

I'm looking for new plugs for the tuned Vitesse engine I'm building and came across their plugs. I had a set of triple electrode plugs in a Golf years ago, but wondered if anyone has tried these ones from Accuspark?

www.ebay.co.uk/itm/Triumph-Vitesse-2-0-6-X-AccuSpark-AC12C-Spark-Plugs-/170650845427?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item27bb9540f3

It's either them or Champion i think.

Personally I'm not a great fan of NGK

[jrevillug]

Never tried them, TBH. As I'm sure you know, the triple electrode doesn't produce a better spark, but it does mean that they last about 3 times as long between servicing, which is why the are quite common on modern cars with long service intervals.

I used to be a fan of NGK, but they don't seem as reliable of late - I've had a new one fail, as have friends - a change in the prodution, perhaps?. I've switched to Nippon Denso from spark-plugs.co.uk/index.php/search/simple/14438.

I'm not sure what grade you need, but the Imp takes NGK BP6ES, and the Denso plugs that I hae in there now are W20EP-U. They cost £1.69/ea inc VAT but plus P+P.

A truly high-performance option might be Denso Iridium plugs (the IW20 is the cross-reference from the W20EP-U). These have a very small tip, which improves flame front propogation. Someone in the Imp club fitted a set to his highly tuned engine and found that the idle was smoother, and the short-term mixture variation recorded by his wide-band lambda sensor was smaller, indicating a more complete, more consistent combustion. I plan to try a set at some stage - but the ~£30 entry price has put me off so far.

[ChasR]

I reckon part of the NGK issue comes down to the place of manufacture. On my Stag when I was buying new plugs for it (NGK BP5ES) I had the choice of buying one batch that were made in France (Halfords), or Japan (from the motorfactors).

So far I have not had any issues with NGKs. I did many years ago, but that car did have a whole host of strange issues (one of which was a shot head gasket).

The one dependable brand I have found (and fairly cheap to boot) are the Bosch plugs. If you require some at a half decent price, PM me (I may know of a cheap supplier).