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, Thu, 2 Jan 2003 17:26:40
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The Haynes manual is odd because it only gives Champion plug numbers and gaps. However, they do have the following recommendation for a 1985cc Turbo with Hall-effect ignition: Champion RC7YCC, gapped to 0.8mm.
The NGK web site has a plug finder but does not list the Turbo with Hall-effect ignition at all. For the non-turbo "hard driven" they specify BCP7ES gapped to .028 which is a little over .7mm. For city driving they have the 6ES.
It's worth browing NGK's site, as it's full of information. For instance, they say (in FAQs) that if you raise compression or add forced induction with a turbo or supercharger, you should reduce the plug gap by .01mm for every 50 bhp increase. However, high power ignition systems mean you can increase the gap. You are not dependent on plug gap in the same way as in a DI-equipped car with Trionic, where the plugs are effectively sensors for the engine management system. But an over-large gap can still lead to fouled plugs.
If it were me I think I'd fit the colder plugs (7 rather than 6 with NGK) and try a tight 0.8mm gap, check everything else in the system (like turbo hoses, breaker gap, ignition advance etc.), drive the car to see how it goes, and look at plug condition after a couple of hundred miles or sooner if it's fluffy. Be prepared to reduce the gap.
Finally - sorry, but did you ask your local Saab dealer for the specs? Now you can tell them the ignition set-up they should be able to tell you, surely.
posted by 213.122.18...
, Wed, 1 Jan 2003 19:49:41, Thu, 2 Jan 2003 14:52:36, Thu, 2 Jan 2003 17:26:40, Thu, 2 Jan 2003 17:25:59
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