Spark plugs + gaps

cameron · Post by **cameron** » Mon Feb 25, 2008 10:03 pm

Anyone know the correct plugs for a '70 S engine which, I believe now has
2.4 pots?

willbrown · Post by **willbrown** » Tue Feb 26, 2008 10:55 am

Take a look at this thread: http://www.ddk-online.com/phpBB2/viewto ... spark+plug

You can find NGK (etc) equivalents listed here: http://www.500race.org/Reference/Spark% ... rison.html

hot66 · Post by **hot66** » Wed Jun 18, 2008 5:59 pm

I currently have NGK B9ES plugs .

I'm about to buy some more plugs .. anyone got any other recommendations or should I stick with what I Know?

johnM · Post by **johnM** » Wed Jun 18, 2008 6:22 pm

Some bloke up at kendal recomended the NGK B9ES so thats what I have got.

Kind Regards

Gary71 · Post by **Gary71** » Wed Jun 18, 2008 6:38 pm

I only have little BP7ES in my T, one day I tune it enough to warrant a '9'

hot66 · Post by **hot66** » Wed Jun 18, 2008 8:02 pm

johnM wrote:Some bloke up at kendal recomended the NGK B9ES so thats what I have got.

Kind Regards

Sounds like I'm in good company then

What plug gaps are you running john?

At the moment mine are at 0.030 , but I'm not sure if this is too large with my stock ignition

johnM · Post by **johnM** » Thu Jun 19, 2008 10:32 am

Hi

I have just pulled out my plugs today to do a tappet check before le mans and I was telling fibs, my plugs are NGK B8EVX. I have gapped them at 0.7mm.

Regards

hot66 · Post by **hot66** » Thu Jun 19, 2008 10:44 am

thats interesting John .. see the response over on Pelican

http://forums.pelicanparts.com/showthread.php?t=415384

hot66 · Post by **hot66** » Fri Jun 20, 2008 10:21 am

Had a chat with Bob Watson & he recommends NGK B8 EGV

I'll report back my findings

Ian Donkin · Post by **Ian Donkin** » Fri Jun 20, 2008 2:34 pm

Gary71 wrote:I only have little BP7ES in my T, one day I tune it enough to warrant a '9'

There's nothing wrong with those Gary - that Cumbrian bloke stuck 12 of those back in Charlotte's car during the rebuild

Not sure how the 13th in the glovebox works though

Lightweight_911 · Post by **Lightweight_911** » Fri Jun 20, 2008 2:54 pm

I also use BP7ES in my twin-plug engine ...

Gary71 · Post by **Gary71** » Fri Jun 20, 2008 4:05 pm

Lightweight_911 wrote:I also use BP7ES in my twin-plug engine ...

hot66 · Post by **hot66** » Mon Jun 23, 2008 9:46 pm

My new NGK b8egv arrived today

They're not cheap !

They have a very fine electrode compared to the plugs I have swapped them for .

OLD PLUGS:

NEW PLUGS:

Bob Watson reckoned they came gapped correctly so I have fitted them as they came out of the box , which turned out to be 0.025" .

Initial impressions ? .... straight away my idle was a lot smoother and the engine seemed slightly quieter too. The popping & banging at idle appears to have gone, but this only really showed itself after a steady run at lowish revs on the motorway. Out on the road it pulls smoother and again sounds quieter. I can't quite work out if the top end is quite the same, but I might try opening the gap to 0.026.

Overall I'm very pleased

The run to Le Mans & back will give the full story.

Mick Cliff · Post by **Mick Cliff** » Tue Jun 24, 2008 7:35 am

hot66 wrote: OLD PLUGS:

Is it me, or does that plug look to be running a weak mixture? I'd be looking for a light tan colour..... maybe the same colour as the 'shed' in the background of the photo.

hot66 · Post by **hot66** » Tue Jun 24, 2008 9:02 am

Probo not the best photo, but agree the plug was not on the rich side. It had just been removed after a while ticking over & I know the car had to be set on the lean side around idle to ensure teh top end was fuelled right . All the plugs were nice & clean with a light tan colour. The MFI has been set up by Bob only 4000 miles ago so I'm not concerned at this stage. I'll see how my new plugs look once I have some miles on them.