91 park ave

I'm going replace my spark plugs in the car and I asked a friend if his
local dealer sold AC Delco plugs, he said no and said buy NGK Platinum
plugs. Any one care to tell me why I would want to buy NGK over AC Delco
(OEM)? He just said there better with no real reason.

Thanks,
Dan.

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Absolutely stay with oe type Delcos, NGK plats lasted 15k in my 3800 Lumina.
"Dan Brow" <dan@NOSPAM.fullmotions.com> wrote in message
news:pan.2005.06.07.23.19.02.130348@NOSPAM.fullmot ions.com...
> I'm going replace my spark plugs in the car and I asked a friend if his
> local dealer sold AC Delco plugs, he said no and said buy NGK Platinum
> plugs. Any one care to tell me why I would want to buy NGK over AC Delco
> (OEM)? He just said there better with no real reason.
>
> Thanks,
> Dan.
>
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I won't buy anything but AC Delco plugs. I can't come up with a real good
scientific reason, but it seems that I'll change them once and never have to
change them again for as long as I own the car. The cheapy ones (canadian
tire, NGK, even champion) I seem to replace after only a year of service.

Steve

"Dan Brow" <dan@NOSPAM.fullmotions.com> wrote in message
news:pan.2005.06.07.23.19.02.130348@NOSPAM.fullmot ions.com...
> I'm going replace my spark plugs in the car and I asked a friend if his
> local dealer sold AC Delco plugs, he said no and said buy NGK Platinum
> plugs. Any one care to tell me why I would want to buy NGK over AC Delco
> (OEM)? He just said there better with no real reason.
>
> Thanks,
> Dan.
>
> ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
Newsgroups
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=----

On Tue, 07 Jun 2005 2058 -0400, Steve Mackie wrote:

> I won't buy anything but AC Delco plugs. I can't come up with a real good
> scientific reason, but it seems that I'll change them once and never have
> to change them again for as long as I own the car. The cheapy ones
> (canadian tire, NGK, even champion) I seem to replace after only a year of
> service.
>

Thanks guys, I change my plugs about every other year, Regardless if they
need to be or not. I'm over 320k km on this car, so any cheap service
I can do to keep it going perfect I just do.

Thanks again,
Dan.

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Dan Brow wrote:

> I'm going replace my spark plugs in the car and I asked a friend if his
> local dealer sold AC Delco plugs, he said no and said buy NGK Platinum
> plugs. Any one care to tell me why I would want to buy NGK over AC Delco
> (OEM)? He just said there better with no real reason.

The NGKs I bought came pre-gapped and were about $2 each.
I didn;t buy the platinum, though. The fact is that you
get a more relaible spark with a big conductor surface,
though it can wear down faster.(at $2 each, I replace them
once a year reguardless of mileage)

Steve Mackie wrote:

>>The NGKs I bought came pre-gapped and were about $2 each.
>
>
> There is no such thing as pre-gapped spark plugs, no matter what the zit
> faced kid behind the counter tells you.

Hi...

Which begs the question if I may?

What would be the noticable/measurable effect of them
being incorrectly gapped?

Old retired electrical guy can't help thinking that a
spark is a spark is a spark...

Having said that, I bought 'em, installed them, only later
to realize that they were gapped to 60 thou and should
have been 80.

What effect (if any) can I expect to see when I correct
it?

Thanks in advance, and take care.

Ken

http://www.corollaperformance.com/Te...parkplugs.html

Let's list the factors affecting establishing a good spark:
1) The gap size: The bigger the gap, the more juice needed (I seem to
remember some old rule of thumb relating that for every thousandth of an
inch increase in gap, you needed five thousandth more volts to jump it...I
cannot remember exactly).
2) The geometry of the gap: Small pointed electrodes require less voltage.
Note that surface conditions makes a big difference.
3) The temperature of the electrodes and the incoming charge: High
temperatures allow for low voltage (but increase probability of knock).
4) The density of the charge: High densities (like those under boost)
require more voltage to spark.
5) Leakage resistance of the insulator (i.e., electricity always wants to
take the easy way out): Maintenance can take care of this.
6) Rate of increase of the voltage at the gap: We are bound by design
here, so there is no sense worrying about this.
7) Ionized gases: Their presence, if any, reduces the voltage needed.
More of an issue for multi-spark systems than our long duration systems.
8) The air-fuel ratio of the charge: Why? Because it sets the electrical
properties of the charge. Lean mixtures are harder on arc initiation than
slightly richer ones.
9) Electrode material.

Having obtained a good spark, we still need to obtain ignition. And yes, it
has its own list of issues:
1) A combustible mixture must be between the electrodes during arc.
2) Large gaps increase the probability of regular firing - except when #4
above, in which case misfiring can occur.
3) A high density mixture liberates more energy when sparked increasing the
probability of flame initiation.
4) It follows that it is easier to ignite slightly rich mixtures than lean
ones - so much for gas mileage, eh?
5) The position of a plug and its electrodes in the chamber relative to the
flow inside that chamber.