Surface Discharge Spark Plugs.

Engineer · Jan 17th, 2006, 17:30

Has anybody else used them?

Engineer · Jan 22nd, 2006, 19:10

Quote:

Originally Posted by Engineer

Has anybody else used them?

I take that as a no then guys?

STE-MAL · Jan 22nd, 2006, 19:45

It doesn't look like it. I don't even know what they are.

Simon J · Jan 22nd, 2006, 20:54

Nor me! What are they?

Engineer · Jan 23rd, 2006, 18:36

Quote:

Originally Posted by Simon J

Nor me! What are they?

Hi Simon, are you going to the VOC meet Sunday? If so we could chat. If not will keep you posted.

Simon J · Jan 23rd, 2006, 18:41

Sadly not - I'm in Warsaw at the moment and my C70 is in Belfast! But one of these days I'll get there. So tell me, what is a surface discharge spark plug????

Ross9 · Jan 29th, 2006, 11:00

I'm also curious, never heard of them.

From the name alone the best I could guess is that ther is no point on the end where it sparks, but simply the actual surface of the plug is charged in order to spark?

If that is what they are, what are the benefits to be had? sounds very bizarre to me.

Ross

ascott1 · Jan 29th, 2006, 14:44

Diagram says it all, but why would you need it except for 'optimal ignition reliability'?

From http://www.beru.com/english/produkte...zen/ultrax.php -

Can't paste diagram in this forum, but scroll down until you get to...

"Schematic diagram of the 6 possible ways to ignite the air-fuel mixture -

"The multifunction principle for optimal ignition reliability: various principles of operation are available for the formation of the sparking path — air discharge, surface discharge and combined air-surface discharge. At the same time, the 4 ground electrodes are offset in height in pairs. On the left the path to one of the two lower electrodes can be seen, (surface discharge), on the right the two possibilities on one of the upper electrodes (air discharge and air-surface discharge). In this way there are six different paths for the ignition sparks."

Ross9 · Jan 29th, 2006, 14:49

Looks very much like the Bosch Super 4 plug, more modern design etc perhaps. Be interesting to see how much they cost.

Not worth it in my opinion, the super 4's operated on the principle that because there were 4 electrodes you always got the best spark, to be honest they were ****, NGK plugs were far better and what I always used in other cars and in the Rover up until it's most recent spec. I use Greddy Iridium ones now at a colder grade than standard.

I don't see there being many, if any, gains from these Surface discharge plugs and they probably cost an arm and a leg.

Ross

ascott1 · Jan 29th, 2006, 14:49

The last posting on results of a Google search got me from 'new' to 'junior' member in the Community member description. Since I've been in VOC since about 1994 and am listed as a forum member since 2002 (it seemed earlier), I kinda didn't like the 'new' bit, though I'm quite happy with junior/menial/non-expert.

Jan 17th, 2006, 17:30	#1
Engineer Rubbing son is racing.... Last Online: Jan 18th, 2017 14:26 Join Date: Nov 2004 Location: London	Surface Discharge Spark Plugs. Has anybody else used them?

Jan 22nd, 2006, 19:45	#3
STE-MAL You Can't Beat A Swede Last Online: Aug 3rd, 2019 18:33 Join Date: Dec 2003 Location: Kesgrave View Photos By: STE-MAL	It doesn't look like it. I don't even know what they are. __________________ 1993 850 2.0 20v SE Auto, 1996 850 T-5 CD Auto 1998 V70 R Manual, 2001 S80 D5 SE manual 2007 S80 V8 AWD Auto 2017 V40 T-3 Inscription Auto

Jan 22nd, 2006, 20:54	#4
Simon J Premier Member Last Online: Feb 15th, 2022 07:50 Join Date: Dec 2001 Location: Back home in 'Norn Iron'	Nor me! What are they? __________________ Simon J

Jan 23rd, 2006, 18:41	#6
Simon J Premier Member Last Online: Feb 15th, 2022 07:50 Join Date: Dec 2001 Location: Back home in 'Norn Iron'	Sadly not - I'm in Warsaw at the moment and my C70 is in Belfast! But one of these days I'll get there. So tell me, what is a surface discharge spark plug???? __________________ Simon J

Jan 29th, 2006, 11:00	#7
Ross9 Master Member Last Online: May 27th, 2022 22:00 Join Date: Dec 2002 Location: Lanark	I'm also curious, never heard of them. From the name alone the best I could guess is that ther is no point on the end where it sparks, but simply the actual surface of the plug is charged in order to spark? If that is what they are, what are the benefits to be had? sounds very bizarre to me. Ross __________________ Astra SRi, wifes S60 T4, and her old S40 T4 though its sat engineless for 7 years since I last updated this project link..better updates soon http://www.volvoforums.org.uk/showthread.php?t=47573

Jan 29th, 2006, 14:44	#8
ascott1 VOC Member Last Online: Jan 31st, 2024 14:00 Join Date: Dec 2002 Location: Ayr	From Google for 'surface discharge...' Diagram says it all, but why would you need it except for 'optimal ignition reliability'? From http://www.beru.com/english/produkte...zen/ultrax.php - Can't paste diagram in this forum, but scroll down until you get to... "Schematic diagram of the 6 possible ways to ignite the air-fuel mixture - "The multifunction principle for optimal ignition reliability: various principles of operation are available for the formation of the sparking path — air discharge, surface discharge and combined air-surface discharge. At the same time, the 4 ground electrodes are offset in height in pairs. On the left the path to one of the two lower electrodes can be seen, (surface discharge), on the right the two possibilities on one of the upper electrodes (air discharge and air-surface discharge). In this way there are six different paths for the ignition sparks."

Jan 29th, 2006, 14:49	#9
Ross9 Master Member Last Online: May 27th, 2022 22:00 Join Date: Dec 2002 Location: Lanark	Looks very much like the Bosch Super 4 plug, more modern design etc perhaps. Be interesting to see how much they cost. Not worth it in my opinion, the super 4's operated on the principle that because there were 4 electrodes you always got the best spark, to be honest they were ****, NGK plugs were far better and what I always used in other cars and in the Rover up until it's most recent spec. I use Greddy Iridium ones now at a colder grade than standard. I don't see there being many, if any, gains from these Surface discharge plugs and they probably cost an arm and a leg. Ross __________________ Astra SRi, wifes S60 T4, and her old S40 T4 though its sat engineless for 7 years since I last updated this project link..better updates soon http://www.volvoforums.org.uk/showthread.php?t=47573

Jan 29th, 2006, 14:49	#10
ascott1 VOC Member Last Online: Jan 31st, 2024 14:00 Join Date: Dec 2002 Location: Ayr	Trivia posting gets me from 'new' to 'junior' The last posting on results of a Google search got me from 'new' to 'junior' member in the Community member description. Since I've been in VOC since about 1994 and am listed as a forum member since 2002 (it seemed earlier), I kinda didn't like the 'new' bit, though I'm quite happy with junior/menial/non-expert.

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