Spark Plugs and caps

[Bryanj]

I just put D7ev into the denso cross reference and it came up with what you said

[deltarider]

It's pity I never tried the D7EV that you had. IIRC it had smaller electrodes which is good. It wasn't overpriced either.

[Ashdowner]

Do D7ES exist? I thought there was only D7EA?

[Seabeowner]

According to NGK the S was copper core center construction and the A "special design", but no details, but think they are pretty much interchangeable though.
https://www.ngk.de/fileadmin/Dokumente/EN/downloads_not_used_in_download_area/ngk_zuendkerzen_code_en.pdf

[Ashdowner]

I've got DR7ES plugs with resistor caps so I suppose I'm completely wrong, but strangely that's what David Silver sells

[Seabeowner]

My 500K0 has the original caps which are 7.5k ohms (and no longer available) which according the the US site were standard on earlier models. But most seem to prefer 5k caps and non resistor plugs, but I have run both combinations. I have installed a relay so that the coils get the full battery voltage so the old switchgear only has to switch mA. If you think there is a problem with the running, change, otherwise I would only replace at the next service.

[Woodside]

Bit of a hijack here but ill be breif..
My cx runs (or should i say is running) dr8es-L
Anyone know if thats correct and whats the L refer too

[AndyH]

The L stands for a 1/2 heat range...i.e. your DR8ES-L is actually an 8.5 heat range.

[deltarider]

The L stands for a 1/2 heat range...i.e. your DR8ES-L is actually an 8.5 heat range.

Not really, the effect is 7.5.

[Woodside]

Cheers for that ...wouldnt of thought the old cx was in need of such fine tuning