 Spark plug, advice |
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| Elliot Cannon |
 Oct 2 2013, 06:01 PM
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#1
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914 Guru  Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None 
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Just got new plugs for my 2.2 liter type 4. New plugs on the left. WR7cc+. The old plugs WR7dc+, have a longer electrode that sticks into the combustion chamber further. Can anyone tell me if the shorter electrode will have any effect on the engine? The old plugs were made in Brazil and the new ones in Russia. (IMG:style_emoticons/default/WTF.gif)
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| SLITS |
Oct 2 2013, 10:24 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
Can't tell you until I see if the heat range of the plug is different. It's to late tonight to go looking for a heat range chart.
Initially, the only effect is to lessen the chances of the piston hitting the plug, but you didn't have that problem anyway. Perhaps the longer electrode provided for better ignition of the fuel/air mix in the combustion chamber. Maybe the Russians are just shorter by nature so they make things shorter. |
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| Mike Bellis |
Oct 2 2013, 10:36 PM
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#3
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None
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Really you should pull a head and see how the plug indexes into the combustion chamber. (IMG:style_emoticons/default/biggrin.gif)
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| Eric_Shea |
Oct 3 2013, 07:19 AM
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#4
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Both 7's as far as heat range goes.
CC is 1mm and DC is 2mm electrode. CC is correct for a T4 |
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| 72hardtop |
Nov 11 2013, 02:17 PM
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#5
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Member Group: Members Posts: 120 Joined: 11-September 13 From: Seattle/HB Ca./Fujieda-Japan Member No.: 16,378 Region Association: Pacific Northwest |
Bosch are crap these days...India, Russia, China, Thailand. Crap pure crap. NGK or nothing.
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| TheCabinetmaker |
Nov 11 2013, 03:07 PM
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#6
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
plus 1 on the ngk.
Looks like your running very rich and that plug was not tight. |
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| Elliot Cannon |
Nov 11 2013, 03:39 PM
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#7
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None
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QUOTE(The Cabinetmaker @ Nov 11 2013, 01:07 PM)  plus 1 on the ngk. Looks like your running very rich and that plug was not tight. The plug was tight. The valve guide wasn't. (IMG:style_emoticons/default/av-943.gif) |
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| Cap'n Krusty |
Nov 11 2013, 05:12 PM
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#8
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
CC is correct for 914s (as well as 911s), extended tips (DC) aren't.
The Cap'n |
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