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Spark plugs + gaps
Posted: Mon Feb 25, 2008 10:03 pm
by cameron
Anyone know the correct plugs for a '70 S engine which, I believe now has
2.4 pots?
Posted: Tue Feb 26, 2008 10:55 am
by willbrown
Posted: Wed Jun 18, 2008 5:59 pm
by hot66
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?
Posted: Wed Jun 18, 2008 6:22 pm
by johnM
Some bloke up at kendal recomended the NGK B9ES so thats what I have got.
Kind Regards
Posted: Wed Jun 18, 2008 6:38 pm
by Gary71
I only have little BP7ES in my T, one day I tune it enough to warrant a '9'
Posted: Wed Jun 18, 2008 8:02 pm
by hot66
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
Posted: Thu Jun 19, 2008 10:32 am
by johnM
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
Posted: Thu Jun 19, 2008 10:44 am
by hot66
thats interesting John .. see the response over on Pelican
http://forums.pelicanparts.com/showthread.php?t=415384
Posted: Fri Jun 20, 2008 10:21 am
by hot66
Had a chat with Bob Watson & he recommends NGK B8 EGV
I'll report back my findings
Posted: Fri Jun 20, 2008 2:34 pm
by Ian Donkin
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
Posted: Fri Jun 20, 2008 2:54 pm
by Lightweight_911
I also use BP7ES in my twin-plug engine ...
Posted: Fri Jun 20, 2008 4:05 pm
by Gary71
Lightweight_911 wrote:I also use BP7ES in my twin-plug engine ...
Posted: Mon Jun 23, 2008 9:46 pm
by hot66
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.
Posted: Tue Jun 24, 2008 7:35 am
by Mick Cliff
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.
Posted: Tue Jun 24, 2008 9:02 am
by hot66
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.