Date: Tue, 29 Aug 2000 14:53:06 -0400 From: "TGhosh" <tapanznopsams.com> Subject: Re: 9000 Aero Problem
HI, OK, my car is a 91 9000s (no turbo :-( ) 5-speed...DI equipped. I changed from NGK to Bosch Platinum +4 plugs. These are the new 4 electrode plugs. Within a day, I noticed smoother, not faster acceleration. And surprisingly, i noticed a 2mpg increase in my local driving. This was the best part of the plugs, because they are paying themselves off. I haven't noticed any rough idle or anything like that. All the effects have been positive. Oh, by the way, my mechanic (not Saab indy) mentioned something about a NGK Laser plug. Does anyone know anything about this?? Thanks guys. -T.Ghosh 91 9000s 142k 5-speed Mathias wrote in message <39ABE5AA.B0C50E9Cnopsamnt.ser>... >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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