Here is what real oem shows for my 320...non cat.
A bit confusing....
Spark plugs M20
Moderator: martauto
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shedrool83
- Old Skooler
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- Location: Dundee Scotland
As above 
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bpowell555
- E30 Zone Camper
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- Joined: Sun Jun 14, 2009 11:00 pm
Is there any difference between NGK plugs for high and low compression 2.5s?
http://www.gsparkplug.com/products/spark_plug/ngk/zgr5a
vs BPR6E / BPR6EIX (iridium)
http://www.gsparkplug.com/products/spark_plug/ngk/zgr5a
vs BPR6E / BPR6EIX (iridium)
1990 325i touring
She's a minter! Best 3 years of my life - bye bye baby
She's a minter! Best 3 years of my life - bye bye baby
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jay528ise1985
- E30 Zone Newbie
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- Joined: Sun Feb 06, 2005 11:00 pm
- Location: Colchester, Essex
ZGR5A are meant for later (approx '87 on) 320 & 325 and have a projected nose so the spark is placed further into the air/fuel mixture, apparently increasing efficiency and having the added benefit that the tip is cooled by the incoming air/fuel mixture during the induction stroke to a greater degree.
I am using these plugs on my 2.7 27 6E B/731 (many people say they don't work with the high compression of the 2.7 conversions), they remain almost immaculately clean with a pale brown colour and no signs of overheating, glazing or cracking.
To summarise: Superb plugs! (In my opinion/experience)
I am using these plugs on my 2.7 27 6E B/731 (many people say they don't work with the high compression of the 2.7 conversions), they remain almost immaculately clean with a pale brown colour and no signs of overheating, glazing or cracking.
To summarise: Superb plugs! (In my opinion/experience)
1989 BMW 320i 2.7 2 door saloon
Yes ok, in some peoples opion, but when others (& NGK) come along and say..Simon13 wrote:get it?!mrcool wrote:OK mine is 88 320 and going by the book that is ZGR5A. I see some people swear by the BPR6ES tho..
It contradicts that and makes things more confusing. So are you saying it doesn't matter if its early or late, cat or non-cat. The early plug should be used still ?jay528ise1985 wrote:ZGR5A are meant for later (approx '87 on) 320 & 325 and have a projected nose so the spark is placed further into the air/fuel mixture, apparently increasing efficiency and having the added benefit that the tip is cooled by the incoming air/fuel mixture during the induction stroke to a greater degree.
I am using these plugs on my 2.7 27 6E B/731 (many people say they don't work with the high compression of the 2.7 conversions), they remain almost immaculately clean with a pale brown colour and no signs of overheating, glazing or cracking.
To summarise: Superb plugs! (In my opinion/experience)
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jay528ise1985
- E30 Zone Newbie
- Posts: 101
- Joined: Sun Feb 06, 2005 11:00 pm
- Location: Colchester, Essex
I wish the ZGR6A was still available, then I could have the best of both worlds!
Last edited by jay528ise1985 on Sat Jan 16, 2010 1:41 am, edited 1 time in total.
1989 BMW 320i 2.7 2 door saloon
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BEAMERFNATIC
- E30 Zone Newbie
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- Location: Down Under
I have Bosch plugs in my beamer and the car is running sweet at the moment ,they are
WR8LC+ Bosch super plus Yttrium .............
This is not to say that NGK are not good as they are a fantastic plug no doubt about it ,basically these are the first plugs I used and they have been great so I have stuck to them ...
WR8LC+ Bosch super plus Yttrium .............
This is not to say that NGK are not good as they are a fantastic plug no doubt about it ,basically these are the first plugs I used and they have been great so I have stuck to them ...