03-12-2008, 09:36 AM
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In the Spider's Nest
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Join Date: Jun 2005
Location: Nutley/NJ & Middletown/OH, USA
Posts: 4,940
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 Quote:
Originally Posted by Tom Swan
I have found that what we were looking at was wrong.
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I think it'd be a good idea for you to take a little time and read the "BOSCH L-JETRONIC FUEL INJECTION IDLE ADJUSTMENT, DIAGNOSTIC AND TUNE UP PAGE for USA models of Alfa Romeo Spiders 1982-1989". It will actually save you a lot of time, and you'll be much more confident about what you are seeing, and it will also help you understand what some of the BB advice is about...
Quote:
Originally Posted by Peter
Not questioning your expertise, you are more knowledgable than I am, but isn't it a good idea to use "non-P-plugs"?? I've read several times that folks have had issues with BP6ES or BP7ES because of the protruded electrode hitting the valves....this should not be a problem with a stock engine, but who know?
I use NGK B6ES in my GTV with no problems....My Duetto still has Golden Lodges, 2HL.
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Peter,
Never worry about asking about anything I may write... You are right that a stock set-up does not need to use "non-P-plugs". With oversized plugs and high-lift cams the "non-P-plugs" are a must, or one needs to index them so that the electrode is lined-up directly pointing to the front or to the back, but not to the side, where the valve may hit it. The Golden Lodge 2HL is a "colder" plug than the HL. Colder plugs are needed for engines that generate more heat. The "hotter" the engine, the "colder" the plug needs to be to dissipate heat, and not crack. European series 3 Spiders have higher compression pistons (10:1, instead of the 9:1 used in the U.S.) and therefore can take a "colder" plug better. If one were to use 2HL plugs on a stock series 3 U.S. engine, chances are that they would foul. (Driving style also plays a part here. If one routinley shifts at 5000 RPM, and/or keeps the engine at high revs, the 2HL plugs would be fine.) We should also keep in mind that Alfa only started differentiating the cars for the U.S.A. after 1968. In '68 they did not export any cars to the U.S., because the SPICA wasn't ready, but starting in '69 they began the modifications and set-up changes to meet U.S. regulations...
Best regards,
__________________
Enrique
Spider 74, 84 & 87
164 93L & 95Q
Milano 88 Verde
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