Spark plug recommendatiions |
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Spark plug recommendatiions |
retrofit |
Jun 25 2008, 12:30 PM
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#1
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Member Group: Members Posts: 176 Joined: 17-April 04 From: Turlock,Ca Member No.: 1,943 |
(IMG:style_emoticons/default/WTF.gif) What spark plugs are recommended for a stock '74 2.0?
There are more choices than the typical Bosche. Allen |
DarrenG |
Jun 25 2008, 12:50 PM
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#2
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Newbie Group: Members Posts: 46 Joined: 20-May 08 From: Liberty, MO Member No.: 9,078 Region Association: Upper MidWest |
(IMG:style_emoticons/default/WTF.gif) What spark plugs are recommended for a stock '74 2.0? There are more choices than the typical Bosche. Allen NGK sells one that you can pick up at any auto parts store. O'Reilly doesn't carry the Bosch, but they did tell me Bosch works better on Porsche. Not an expert, but I use the Bosch & they work fine. |
TheCabinetmaker |
Jun 25 2008, 01:46 PM
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#3
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
NGK BP6ES!
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SGB |
Jun 25 2008, 02:56 PM
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#4
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
Bosch copper (I think its is WR-7)
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Cap'n Krusty |
Jun 25 2008, 02:58 PM
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#5
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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 |
That would be "B6ES" Extended tip plugs are not recommended for the T4 engine. Bosch equivalent is "W7CC", or "WR7CC". "W8CC" works well for California winter fuel. No Champions, no Autolites, no ACs, no platinum plugs, and NO SPLITFIRES or any other snake oil dipped plugs. The Cap'n
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narino |
Jun 25 2008, 03:05 PM
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#6
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Member Group: Members Posts: 231 Joined: 14-August 07 From: Los Angeles, CA Member No.: 8,001 Region Association: None |
Small hijack, with pretty naive question. Cap would you recommend the same on a big bore engine (2.6) ?
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JoeSharp |
Jun 25 2008, 03:23 PM
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#7
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
(IMG:style_emoticons/default/agree.gif) with the Captin. B6ES by NGK. look for the heat range you want to run with a cheep plug, and then go to the HIGH DOLLAR pulgs if you feel inaduquit with the NGK's. After you have fouled several of the high dollar pulgs you will come back the the NGK's.
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Joe Ricard |
Jun 25 2008, 03:52 PM
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#8
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Yep I run NGK B6ES in the 2098cc 10.3:1 motor.
Ran NGK B7ES in lower compression motor New 2316 will get a Motorcycle plug supplied by Jake as part of the kit. Bottom line not any one plug will work in all motors. Got to find what works for ya. |
TheCabinetmaker |
Jun 25 2008, 04:12 PM
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#9
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
That would be "B6ES" Extended tip plugs are not recommended for the T4 engine. Bosch equivalent is "W7CC", or "WR7CC". "W8CC" works well for California winter fuel. No Champions, no Autolites, no ACs, no platinum plugs, and NO SPLITFIRES or any other snake oil dipped plugs. The Cap'n I have been corrected by the best, and he is right. No P. |
Rick_Eberle |
Jun 25 2008, 05:55 PM
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#10
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Member Group: Members Posts: 390 Joined: 14-January 04 From: Geelong, Australia Member No.: 1,558 |
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Cap'n Krusty |
Jun 25 2008, 06:36 PM
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#11
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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 |
I'm makin' this up, but it would seem to me the location of the spark might be why you use the standard reach plugs. Older 911s use 'em, too, except for the MFI cars, which used an exotic Platinum plug. Mostly we replaced those with BP7ES or BP8ES 'cause nobody wanted to spend 25 bucks a plug .............. The Cap'n
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ericread |
Jun 25 2008, 06:52 PM
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#12
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The Viper Blue 914 Group: Members Posts: 2,177 Joined: 7-December 07 From: Irvine, CA (The OC) Member No.: 8,432 Region Association: Southern California |
I posted this response the other day on another thread, but I thought this might be pertinent to this thread. Yes, you'll notice I cut some corners in this response in an effort to not post a lengthy article.
A spark plugs’ heat range is an index of its capacity to dissipate thermal energy. The different characteristics of automotive engines regarding operating load, compression, engine speed, cooling, and fuel make it impossible to run all engines with a standard spark plug. The so called “heat range”, which is assigned to each spark plug, is used to characterize these heat dissipation capacities. A plug with a low heat range number (e.g., 2-4) indicates a cold plug that quickly dissipates heat to the engine block and cooling system, while a high code (e.g., 7-10) indicates a hot plug that retains heat. By properly selecting the heat range of the plug, it ensures that the plug will operate between the plug’s designed operating range of 500-900 degrees Celsius. In this range, the spark plug will be self-cleaning, yet will not be hot enough to pre-ignite the air/fuel mixture. In some situations, a slightly hotter or colder plug may be installed than the one normally recommended. But a hotter plug should not be used unless an engine is experiencing a fouling problem because of the increased risk of preignition and detonation. Switching to a slightly colder plug can reduce the risk of preignition and detonation in performance applications (especially turbocharged and supercharged engines. Copper and Platinum spark plugs come in many heat ranges. So what's the difference between these plugs? First, let's take a look at the thermal characteristics of commonly used electrode materials: Zinc == 1.16 Aluminum == 2.37 Copper == 4.01 Steel == 0.70 - 0.82 Platinum == 0.716 Iridium == 1.47 As you can see, copper has the best thermal characteristics, and makes the best material for a spark plug conductor. So why use Platinum. Because while copper is the best conductor, it also burns off faster under higher temperatures. Coating the copper with a fine layer of Platinum allows for a longer life at higher temperatures, but requires a higher voltage spark. Now you can reduce the voltage necessary to get a suitable spark by narrowing the diameter of the electrode. But this lowers the ability of the electrode to dissapate heat. And we are back to the problems of a heat, preignition and detonation. Whew, it kind of goes in a circle. Sooooo, although you could use a Platinum plug in the correct temperaure, 1) You might find that the stock ignition system of our 35 year old cars isn't really made to carry the higher voltage these plugs may require; 2) You might find the plugs may contribute to problems of preignition and detonation, and; 3) You will probably find the 914 combination of lower compression and lower heat temperature make it really ideal for using a copper plug As for actual plug sizes: Yes, there are many lengths of spark plugs. Place a very long plug in a 914 and the plug will contact with the piston head - causing disasterous results. Eric Read (IMG:style_emoticons/default/bye1.gif) |
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