Date: Wed, 30 Aug 2000 03:18:53 GMT From: Ken Washington <kenwashinopsamhlink.net> Subject: Re: 9000 Aero Problem
My 87 9000S had NGK BCP6ES plugs, when I got it from the previous owner. I switched the the single electrode Bosch Platinum plug gapped at .028 and my 9000 ran fine, as had the 87 900S I owned just before it (Car was totalled). I have a Saabtech friend with an 87 9000T. He bought his 9000 new and does all of his own work. He was in aircraft maintenance for 24 years and his ASE certified. He tried a set of the Bosch +4 plugs in his first. After two months he told me noticed more power through acceleration and improved gas mileage from 350 per tank around town to 380 miles per tank. I put a set in my 87 9000S. I noticed a stronger power band through the gears, especially 3rd, 4th and 5th. I also noticed an increase in my gas mileage. I average 31 to 36 mpg on the road. The Bosch + 4 plug is a form of multi spark distribution. I like the plugs because you don't have to worry about a gap. Just check them about every 10,000 to 15,000 miles for tightness. Ken Washington 87 9000S 87 900S 83 900T Mathias wrote: > Hmm....cool down guys..... > > Let me share my experiences.... > > 1. The strong recommendation to use only these NGKs is valid only for DI > equipped cars. Ken (obviously) and others have reported good (or even > better) results with other plugs as well. Ok? > > 2. The '91 and '92 9k models uses Lh242 and saabs DI/APC system. On > these cars knockdetection is NOT done using the plugs/DI unit. The > number one rule here is to use resistor plugs as this is what the DI > unit needs. From listening to my friends in the swedish Saab turboclub, > most (all) people seems to share my experience that the BCPR7ES plugs > works best. Other plugs seem to create problems (wont name them cause I > dont know exactky which ones). It is also very important to gap the > plugs properly. Ok? > > 3. Trionic equipped cars 9k '93-'98 uses the plugs and DI unit for knock > detection. This system has been tested/designed/configured for the NGK > plugs. I have never, ever, heard of anyone who has had better result > with plugs other than the spec NGKs. Many people have bought different > sorts of very expensive magic plugs that promises gazillion extra bhp. > The result? More power? No. Wavering boost, missfires etc etc.....Why > spend more money on plugs than what is needed. As for all DI cars, its > very important to gap the plugs properly. Ok? > > These plugs also work fine for extremely tuned cars. > > I usually recommend people to use nothing but these NGKs simply because > we KNOW that these plugs work. Your car will work as specified if the > rest of the car is ok. If you have a problem with missfires, wavering > boost etc, troubleshooting is impossible/useless until you have these > NKGs fitted, cause you will never know if its the new expensive plugs > that causes the problems or something else. > > As for the Bosch plugs: I have never hear of anyone (ok maybe ONE) who > has had good results with a Bosch plug in a DI car. Its as easy as that. > I dont have anything against bosch plugs. I just know that my, and other > DI saabs seem to work best with these NGKs. If anyone find the some kind > of Bosch plugs to work better, hey, go ahead and use them. But if we are > troubleshooting cars that doesnt work properly...naahhh... > > As for non-turbo cars, I have no real experience. But I wouldnt use > anything else than the NGKs on them either. Why fix what is not broken? > > TGhosh, I would like to hear more about the improvements you have > noticed? > > Ken, to make my comment valid, you will find my email address right > after my name. And if you look closely on Gorans post, you will find his > address there (in his post) as well. So I guess his comment is valid. > > Best regards, > Mathias > 9k Aero '91 > mathias.sodergrenREMOVETHISTEXTnopsam.telenordiaWELLWHYNOTREMOVETHISTOO.se > > > > Ken Washington wrote: > > > > I am very aware of what is suppose to be the technical reason for the NGK plug, and > > I don't need you to tell me that all of my Saabs were not DI-equipped. I bought my > > 83 900T new and picked it up at the factory in Sweden. I was still stationed in > > Belgium, when Saab debuted the 16V engine at the Frankfurt Auto Show, and I have > > watched the development of the car. But you still don't address the possibility > > that Bosch can make a spark plug that does the same thing as the NGK plugs. It is > > not rocket science. I just love it, when people feel this urge to make comments > > from a blind email address. I guess that makes your comment invalid. > > > > Ken Washington > > 87 9000S > > 87 900S > > 83 900T > > > > Goran Larsson wrote: > > > > > In article <39AB271E.F200B1A7nopsamhlink.net>, > > > Ken Washington <kenwashinopsamhlink.net> wrote: > > > > > > > In fact I have used Bosch Platinum plugs in all of my Saabs, 83 900T, 87 900S > > > > 16V and 87 9000S 16V. > > > > > > None of these cars have DI. The DI unit uses the plugs to measure the > > > ionization inside the combustion chamber. Using the wrong plug may > > > affect the measurement. Many people have reported problems with other > > > plugs than the NGK plugs Saab specifies. > > > > > > -- > > > Göran Larsson Senior Systems Analyst hoh AT approve DOT se
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