Plugs

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Michael Bayer
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Joined: Mon Nov 04, 2002 7:22 am

Plugs

Post by Michael Bayer »

Guys It's time for new plugs in the 330, I typically use NKG B7EVX (25 mm gaps) any better or later ideas? I am running w lead in the gas. Thanks in advance, M
Michael J. Bayer
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DWR46
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Re: Plugs

Post by DWR46 »

B6ES. There is really no reason to run the colder "7" heat range unless you drive very hard. We race our LM on B7ES with no problems. You can use the more expensive varieties if you wish, but the standard plugs have always worked well for me. If you want to run the projected tips, use BP6ES.
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Re: Plugs

Post by 330GT »

You might want to look at http://www.ferrarichat.com/forum/showth ... p?t=294390. Concerns 308s, but the same theory should apply to the V-12s.
Regards, Kerry
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John Vardanian
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Re: Plugs

Post by John Vardanian »

Any thoughts or experiences on the Denso Iridium Power Spark Plugs for the 250 engine? Thanks.

john
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kare
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Re: Plugs

Post by kare »

DWR46 wrote:If you want to run the projected tips, use BP6ES.
On 250-engine piston may hit the ground electrode of BP6ES depending on the position of the plug, unless they are set into correct position (groun electrode pointing away from the piston) or double crusher rings are used (IMO not a very good idea, but it seems that in the old days many people did just that). Don't know if there is more space on a 330, but on 250 I'd stick to using B6ES plugs. They are about 4 mm shorter (=5/32").

Best wishes, Kare
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Re: Plugs

Post by 250GT »

Hello plug fans,
In the 80th almost every 250gt used the CHAMPION N7YC.
My expiernce was that these plugs were in funtcion good , but the thread are made too scharp and can ruin the aluthread in the cylhead,
I ruined several by taking them out, but thats 25 years ago. Helicoil was available allready.
Since than I always use the NKG B8ES without any problems in stop and go and on full speed.
Never take them out in a cold engine!
half warm is the best so you will never ruin the heads . take off the heathschields first
The first 12, I ever removed and renew took me a compleet morning. !983
Now with the right tools( hazet) -inside and outside plugs- about one hour, see pics.

C.
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DWR46
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Re: Plugs

Post by DWR46 »

Well, I appears that it is time to put another myth to bed. The old stories about certain 250 engines having the end of the spark plug hit the piston is just not true. If you have ever actually examined the combustion chamber of a 250/275/330 cylinder head, you will find that the spark plug electode sets in a "well" that is connected to the combustion chamber. There is no physical way for the piston to actually touch any part of the spark plug, even projected tip styles.

What is actually happening, is that on some head castings (especially a run used during Lusso production), the walls of the "well" are not straight. This can cause the tip of some projected tip spark plugs to contact the curved wall as they are tightened into the head. The result is that the electrode gap is closed up. However, it is the wall of the "well", not the piston that is contacting the spark plug.

All you have to do is install the plug and then remove it, if all is well, than the projected tip plug will be fine in the engine.
zac
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Re: Plugs

Post by zac »

I am an NGK fan myself, usually B6ES set at .030" for points ignition and .040" for electronic or magnetos. B5ES for cars than smoke a little or than run a little rich, keeps them from loading up or fauling in stop and go stuff.

Cornelias, I here you on the spark plugs. First time I changed the oil and plugs on a early V12 it took me most of a day, between figuring out how to remove the heat shields and find the right spark plug tool to get the back plugs was definitely a learning experience.
One trick I learned long ago was to take an old spark plug wire and cut it about a foot long, than I use it to start the plugs in each hole before tightening them with the wrench.

Zac
1970 365 gt 2+2 13137, 1997 550 Maranello, 1969 Lamborghini Miura S, 1973 365 GTB/4 Daytona
John Vardanian
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Re: Plugs

Post by John Vardanian »

Getting back on the subject, has anyone used "exotic" (read that as expensive) plugs and has stories? Thanks.

john
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Re: Plugs

Post by 250GT »

John Vardanian wrote:Getting back on the subject, has anyone used "exotic" (read that as expensive) plugs and has stories? Thanks.

john
Hallo John,
There are so much commurcial talks about this issue,
Plugs IMO has not that huge influence in the whole chain.
Pleople try often to improve the peformamnce of the engines by changing the easy things, and hope for a mirracle
in this chain I would make a fine tuning of the carbs.
and more important to lett set it perfectly on TIME.
Thats the way.
But the best you can do is to drive it at least once a week 100 miles.
get rid of the inside shit of the engine.
Even after a long run the fine tuning values are changed again.
So you have to try out youre self every comment here is useless about new plug
If you can feel the differance, you are mine saint.
And you will know placebo medicine works too
But believe is necessarry.

Best
Cornelis
Michael Bayer
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Re: Plugs

Post by Michael Bayer »

Thanks for the tips and the spirited discussion and to Zac for putting another urban legand to bed I am not looking for more speed just due for clean plugs but do agree that more advance (w of cource higher octane) is an easy way for some additional power.
Michael J. Bayer
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Re: Plugs

Post by 250GT »

Michael Bayer wrote:Thanks for the tips and the spirited discussion and to Zac for putting another urban legand to bed I am not looking for more speed just due for clean plugs but do agree that more advance (w of cource higher octane) is an easy way for some additional power.
Mr Michael B,
Are you sure DWR46 and Mr ZAC are the same persons ?
there way of writing are clearly differant to me. but I am a foreigner.

C.
Michael Bayer
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Re: Plugs

Post by Michael Bayer »

Gosh I thought DWR46 was Zac My appologies to both of you guys! M
Michael J. Bayer
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tyang
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Re: Plugs

Post by tyang »

Hi Michael,

DWR46 is Dyke Ridgly, Ferrari Restorer and Historian from IL. and Zac is Zac Dugger from DGR Performance of Oceanside CA. Both are assets to this Forum.

Tom
'63 330 America #5053
Michael Bayer
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Re: Plugs

Post by Michael Bayer »

I could not agree more! Aagin Dyke Ridgl and Zac is Zac Dugger my appologies for confusing your "nom de Yang"!
Michael J. Bayer
330GT s/n 9727
365GTC4 s/n 14943
Dino Spider s/n 1193
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