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skanders 
Senior Member II 
Joined: 19-April-2005 Location: mansfield Status: Offline Points: 241 |
 Topic: 1 PRONG PLUGS OR 4 PRONG PLUGSPosted: 22-September-2005 at 11:19 |
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Your opinions guys 4 prong bosch spark plugs or 1 prong champion spark plugs does it make a difference which ones. let me know. |
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Rhys
Moderator Group 
Coffee addict... Joined: 02-February-2003 Location: from the Latin locātiō Status: Offline Points: 10053 |
Posted: 22-September-2005 at 11:36 |
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In an E30 320i, tried the 4 prong ones - engine ran rough, put in standard plugs - engine ran fine.
I stick with standard plugs, it's what is recomended by the manufacturer (who has spent millions in developing the engine in the first place) |
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V reg Rustbucket Merc C220 Cdi estate
J Reg Saab 900i 16v '63 Ford Anglia 105e deluxe R reg Honda PC50 moped.. No BMW as yet... |
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skanders
Senior Member II
Joined: 19-April-2005 Location: mansfield Status: Offline Points: 241 |
Posted: 22-September-2005 at 11:41 |
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Forgot to mention the car i have i meant for better fuel consumption which ones would you recommend for a bmw 320i e36 year 1991 |
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Rhys
Moderator Group
Coffee addict... Joined: 02-February-2003 Location: from the Latin locātiō Status: Offline Points: 10053 |
Posted: 22-September-2005 at 11:55 |
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Better fuel consumption, wouldn't know about what plugs to put in - I have tried the 4 prong jobbies and wasn't impressed. Also have you noticd that plugs always come in boxes of 4, bit of a pain if you have a 6 - then again you then have 2 spare
Could try chipping/mapping? feathering the throttle when traveling at speed. I managed to get a steady 47mpg at 65/70 by doing this - and yes it is a petrol engine (1.8l 16v M42 to be exact running on BP Ultimate)
forgot to mention, mines a '95 E36 Edited by Rhys |
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V reg Rustbucket Merc C220 Cdi estate
J Reg Saab 900i 16v '63 Ford Anglia 105e deluxe R reg Honda PC50 moped.. No BMW as yet... |
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Badger 540
Really Senior Member I 
Joined: 23-October-2003 Location: West Midlands Status: Offline Points: 451 |
Posted: 22-September-2005 at 17:33 |
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Tried some Bosch Super 4 plugs in the 540i, lost a little bottom end torque and smoothness. Interestingly, if you compare the nose lengths between the Bosch and NGK originals, they are slightly different, so the spark will occur in a slightly different position in the combustion chamber. The Berus are the same length as the NGK's. Andy Edited by Badger 540 |
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Badger540 West Midlands
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john.med
Really Senior Member I
everydays a schoolday Joined: 30-November-2004 Status: Offline Points: 339 |
Posted: 25-September-2005 at 17:11 |
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NGK OEM only. Bimmer engines run hotter than most apparently and only OEM single prongs will do, as specified by BMW. Ring your local indie or stealer, they should sell 'em cheaply enough or at least tell you the part number etc...
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currently driving a RENAULT clio sport 172!!!!!!!!!!!!!!!!!!
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thepits
Moderator Group
Joined: 09-July-2003 Location: far far away Status: Offline Points: 10000473 |
Posted: 25-September-2005 at 17:45 |
Personally I think Champion plugs are  and I've never managed to make them work in any of my cars - stick with the standard BMW ones! 
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Cats know your every thought.
But don't care. |
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skanders
Senior Member II
Joined: 19-April-2005 Location: mansfield Status: Offline Points: 241 |
Posted: 25-September-2005 at 17:51 |
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well the champion 1 prong ones are working wonderfully for me
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Madrab
Really Senior Member II
Joined: 21-November-2003 Location: Scotland Status: Offline Points: 569 |
Posted: 26-September-2005 at 07:47 |
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I would agree with most and say that I would never recommend Champion and go with NGK all day long in BMW engines. The champion performance fall off is quite steep against others and I have found they can foul up quite easily and NGK's do run cooler as J Med mentions. Rob |
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1990 E3o 325i Touring and she's definately a she! Pain in the ass sometimes but goes like a bunny :oD
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GT6-M3
Senior Member II
Joined: 11-August-2004 Location: England Status: Offline Points: 237 |
Posted: 26-September-2005 at 08:58 |
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The only point of multi electrode plugs is to prolong plug life. The spark jumps the shortest gap untill that electrode erodes away, the spark then moves onto the next smallest gap. There are no performance or economy gains to be had from using different plugs. |
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If anyone like old cars with big BMW engines, take a look at www.gt6.org.uk
sign the guestbook, you know it makes sense! |
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chacha
Groupie 
Joined: 13-October-2003 Location: Basildon, Essex Status: Offline Points: 42 |
Posted: 29-September-2005 at 10:47 |
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The best plugs for BMW are Original High Power Spark Plugs made by NGK.
Part Number is 12129071003 and costs 7.85 each form a dealer. Cheers! |
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chippeduk
Really Senior Member II
ECU Tech Joined: 04-June-2004 Location: United Kingdom Status: Offline Points: 696 |
Posted: 29-September-2005 at 11:00 |
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I am personally dead againt the 4 prong ones. i knew an old engineer and he pointed out to me that the 4 prongs have 4 areas where the prong stops a spark path to the fuel whereas a single only has one. tests done prove that in any area the better burn came from a single prong over 3 or 4. its not my field but i have always stuck to this and never had an issue. my m3 engine used single prongs and ran perfect and i hammered that for 3000 miles in 7 days |
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jayson@chippeduk.com www.chippeduk.com 07815-501867 - 01527-579345 |
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GT6-M3
Senior Member II
Joined: 11-August-2004 Location: England Status: Offline Points: 237 |
Posted: 30-September-2005 at 08:56 |
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That's an interesting perspective (not passing judgement here BTW) but if the 4 electrode plugs reduced the efficiency of the plug by masking the spark, surely people wouldn't have much success with surface discharge plugs as found in some race engines and rotary engines?
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If anyone like old cars with big BMW engines, take a look at www.gt6.org.uk
sign the guestbook, you know it makes sense! |
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chippeduk
Really Senior Member II
ECU Tech Joined: 04-June-2004 Location: United Kingdom Status: Offline Points: 696 |
Posted: 02-October-2005 at 07:29 |
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In truth, this is not my field of knowledge and i picked this up from a race team who were against the idea of them. I have kind of taken this advice and steared clear of them since. |
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jayson@chippeduk.com www.chippeduk.com 07815-501867 - 01527-579345 |
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1 PRONG PLUGS OR 4 PRONG PLUGS
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Replaced them with Beru's from ECP, much better. 
skanders wrote:
