 Best Spark Plugs for Carburated 914? |
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| adidas |
 Oct 25 2007, 12:57 PM
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#1
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Member  Group: Members Posts: 489 Joined: 6-February 03 From: Charlotte NC Member No.: 250  |
A 914 that has been converted to a new single carb is carbon fouling a practically new set of Bosch Platimum spark plugs in just a few weeks. A low pressure facet style fuel pump is installed. The fuel/mixture screw is leaned out with no luck. What have you found is the best brand and heat range spark plugs for a carburated 914. Thanks
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| VaccaRabite |
Oct 25 2007, 01:21 PM
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#2
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En Garde! Group: Admin Posts: 13,444 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Quick, get rid of the single carb before the sharks start to swarm. :-)
Single carbs don't work well with 914s, the gas has too far to go to get from the carb to the engine. Find some dual dellortos or dual webers. The carb may well be causing your plugs to foul, as the gas will kind of pool in the manifold, instead of going in properly atomized. At least, that is my understanding of the issue. Zach |
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| Allan |
Oct 25 2007, 01:29 PM
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#3
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Do you have a pressure gauge to see how much fuel pressure the pump is actually putting out. That carb probably only likes 3 - 4 lbs. I second the swap to dual carbs, but if you're stuck with what you have then NGK B6S plugs should work.
Check the pressure from the pump, if it's too much, get a regulator. |
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| Winfield |
Oct 25 2007, 01:46 PM
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#4
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Newbie Group: Members Posts: 10 Joined: 3-July 07 From: Warren, New Jersey Member No.: 7,868 Region Association: North East States |
QUOTE(adidas @ Oct 25 2007, 02:57 PM)  A 914 that has been converted to a new single carb is carbon fouling a practically new set of Bosch Platimum spark plugs in just a few weeks. A low pressure facet style fuel pump is installed. The fuel/mixture screw is leaned out with no luck. What have you found is the best brand and heat range spark plugs for a carburated 914. Thanks I have dual 44m webers on my 2.0 and have been using Bosch wr7dc for track events for years w/o problems. For what that is worth (IMG:style_emoticons/default/idea.gif) |
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| IronHillRestorations |
Oct 25 2007, 08:18 PM
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#5
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I. I. R. C. Group: Members Posts: 6,719 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None 
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You DO NOT want those fine wire platinum plugs on a carburated engine! Plain 'ol Bosch supers will do much better. The fine wire platinums foul very easily, they are for modern injected engines.
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| Aaron Cox |
Oct 25 2007, 08:45 PM
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#6
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
NGKs
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