Date: Thu, 03 May 2001 17:28:23 GMT From: "M PLUMLEE" <eplumleenopsamouth.rr.com> Subject: Re: Bosch 4-Plus Plugs: Good Idea or Bad?
the 7's are for hard drving, the 6 for city traffic "Dave Hinz" <dhinznopsamh.execpc.com> wrote in message news:3ae97e82$0$12824$272ea4a1nopsam.execpc.com... > Mark Jefferis (jefferisnopsamuoregon.edu) wrote: > : Does anyone have an opinion whether I should use Bosch 4-Plus plugs in my > : '86 Saab 900? Any insights at all are welcome. > > I can't help but think that, since everything *else* in the car that's > fuel or ignition-related is from Bosch, and the fact that SAAB uses > NGK spark plugs, that there must be some reason for that. > > In other words - I bet they tried it, found the NGK's to be better, and > that's why they ship with them. I'm inclinded to believe them. I believe > the BP7ES is what you want for normal driving, and BP6ES for hard > turbo-stomping driving. Check those numbers though, as they're from memory. > > If you want to get some horsepower for low effort, look into getting a > K&N air filter kit, rather than spark plugs. Lots more "bang" for the > "buck" there. > > Dave Hinz > >