I've never done this, but my understanding is that you'll need the
assortment.
The idea is to get all the electrode tips on the plugs pointing a
certain way. Out of the box, you have no way of knowing which way the
tips will face.
So, you may need you move them 1/4, 1/2, or 3/4 of a turn more or less.
I really doubt it's worth the effort on a street car ...
OTH, I could be completely wrong about all this :-)
Jeff
Sent from my iPhone
On Jul 11, 2010, at 8:31 PM, [email protected] wrote:
I picked up a set of both the B7ES and the BP7ES NGK plugs today.
Naturally, the auto parts store didn't even know what plug indexing
washers are.
Thanks to google, I found an overpriced set on Amazon, thence armed
with a part
number, I found a selection on eBay.
Here's the question: the flat copper ones seem to come in two flavors,
either all .012" OR as 10 each of sizes .043", .054" and .064". The
guy with the
.012s claims one washer equals about 1/4 turn on the plug. If that's
true,
then wouldn't the others be too thick? If you've done this trick
before,
which set do I want?
Stevan Thomas
73 Berlina
In a message dated 4/30/2010 10:37:03 PM Pacific Daylight Time,
[email protected] writes:
Date: Fri, 30 Apr 2010 10:16:49 +1200
From: Les Singh <[email protected]>
Subject: [alfa] RE: alfa-digest V10 #2256
Date: Wed, 28 Apr 2010 21:25:13 EDT
From: [email protected]
Subject: Re: [alfa] My GTV-6 has developed a "miss"/irridium spark
plugs
Hi Ken,
I've recently been running Bosch platinum single electrode plugs in
the
Berlina and they don't seem to last all that long. I have some 4
electrode
plugs I'm going to try next. Would you mind providing heat range/part
numbers
for the two iridium plugs? Is there a Denso or an NGK iridium that
works
in
a
2 liter quattro banger? I'm also intrested in the plugs for a 6.
Stevan Thomas
73 Berlina Veloce
84 GTV6
Stevan
If can butt in here : Can't help with the GTV6 but for the Berlina
the
NGK
B7ES is the correct plug and lasts way better than any Bosch plug
I've
tried. I used Bosch in various engine and the only one I kept using
them
in
was the Formula Ford but we changed to new ones for qualifying and
the
races
- - expensive because these were the special competition types with
small
hex
and special electrodes and cost heaps.
NGK BP7ES may give you better running and performance than the
B7ES. It's
the projected nose type but for use in 2 litre Alfa engines, each
plug
will
need to be indexed by marking the position of the ground electrode
on the
porcelain or body of the plug, then ensuring that the electrode
ends up
between the valves when the plug is installed. If this isn't done,
you may
hear the clicking sound of a valve (intake more often than exhaust)
contacting the electrode. If you get fouling for any reason (state
of the
engine, tune etc) go to the hotter B6ES or BP6ES but these are
definitely
not suitable for high rpm use.
Les
Back from La Bella Italia.. and yes, I visited the Alfa Museum!
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