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| Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension. |
Topic Review (Newest First)
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| 05-20-2008 12:34 AM | ||
| 93nut |
Inspection is every 2 years and yes I did just put the stock muffler on only for inspection. I had to buy a new OE muffler this year for inspection because my original was rusted out with holes. It's pretty easy to swap them, 2 bolts and three hangers. I have the Flowmaster muffler welded to a section that matches the pipe fittings so it bolts up just like the stock muffler. I live in a gated neighborhood and the Flowmaster was starting to get me dirty looks by the older people on my block. I think I own the oldest car in my neighborhood.  . As for after market mufflers that are allowed for Saab here in Germany, Hirsch has the market cornered all by itself. Damn near 400 Euros just for thier muffler so I can have legal paper work is not worth it to me.  I ran the Flowmaster all year anyway but if I wreck on the Autobahn and they do thier manditory inspection of my car, I will get [email protected]#*ed for every aftermarket piece of equiptment that I don't have GERMAN paperwork for. OUCH!
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| 05-19-2008 08:27 PM | ||
| Palmer |
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Same here. I use one to prop the door open when I paint. |
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| 05-19-2008 08:22 PM | ||
| Topher |
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| 05-19-2008 07:44 PM | ||
| JZW |
Yea, we live with what we can work with and I was not arguing with you, more the other people that were saying the stock muffler is just fine. I thought the ferrita was ok since Maptun sells them, what about borela? Is it just for inspection? Can you run stock for inspection, then bolt up a ferrita or something for the rest of the year or two? I have to put my stock ecu, full cat dp in and stock fuel injectors to pass emmisions here in my state, Colorado USA. Then after I pass I have two years before it has to be tested again. I then put the big fuel injectors back in the car, the free flow dp and tuned ecu with lots of timing and fuel... Good luck, John |
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| 05-19-2008 12:08 PM | ||
| 93nut | I guess the only problem that might be effecting performance would be the bottle neck effect at the stock muffler because everything else is 3" pipes. Once again, AFAIK, only stock, OE mufflers are alowed for saabs here in Germany. Thats why I have to have the original muffler on the car. Not my choice, just the LAW! | |
| 05-19-2008 07:11 AM | ||
| JZW |
We tested the saab sport 2.5" against and full 3" with magnaflow and got similar results, less knock on the full 3" system. That is the bottom line, less knock levels read is always good  What that would mean for t7 is that it would have to work less hard to make mass air requirement. Its still a good thing to have for performance in my opinion. I am sure you can get away with a stock muffler and good dp, but why not go the extra step and not just "get away" with something and have a full 3" with a good flowing cat and a good muffler? If there were no benifits, race cars would have full cats and mufflers and those turn out cat and muffler by-pass valves would not exist. Check out Nicks test, open dp and full system. http://genuinesaab.com/gallery/Gt307.../compareopendp John |
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| 05-19-2008 05:47 AM | ||
| jonny72888 | how does the saab sport muffler compare to the others, mayb you could use that? | |
| 05-19-2008 12:09 AM | ||
| 93nut | It's not TUV approved and their is no DB rating for a specific auto make. It's only rated at LOUD. LOL | |
| 05-18-2008 06:58 PM | ||
| DViggen |
Sound restrictions probably. I also don't think they have undergone the TUV testing..... I know that with my Jetta, I was able to get away with a Borla muffler for TUV.....I failed with a Magnaflow muffler. Quote:
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| 05-18-2008 06:07 PM | ||
| Saab9-3se | Why is the flomaster illegal in Germany ? | |
| 05-18-2008 04:10 PM | ||
| dan-the-kid |
I got a 3" waiting to be put on.... JP DP, Magnaflow cat, straight though, to a magnaflow muffler. My guess is that its gonna sound sick. |
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| 05-18-2008 12:55 PM | ||
| aero93 | i ran a viggen muffler with my stage 4 setup, and loved it | |
| 05-18-2008 10:35 AM | ||
| 93nut | The difference in performance was only different until the ECU re-adapted to the new muffler. After a couple of good WOT autobahn runs, the factory muffler was stinking like burnt metal and the car is now boosting the same as before, just quieter. LOL | |
| 05-10-2008 11:24 PM | ||
| 93nut |
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| 05-10-2008 03:00 PM | ||
| liketheword |
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 The stock exhaust does quite well for performance as long as you have the dp setup already. If you have concerns about back pressure remove one of the 2 mufflers and call it a day before you spend your time and money for next to no gain. |
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| 05-10-2008 01:25 PM | ||
| JZW |
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Its an easy thing to test. Take a tech2 from a shop and test the knock level with stock muffler or mufflers and then put a magnaflow on there and see what the knock level is after the swap. Same with the back-pressure. See what you're boost is with the stock muffler and then put a good magnaflow on there and see what it is then. We saw a 2-3psi increase in boost from swapping the muffler only...  John |
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| 05-10-2008 12:41 PM | ||
| 93nut | I was looking for a dyno or flow chart but haven't found one. My but dyno says the stock muffler gives me more torque. Well, thanks for all the replies. | |
| 05-10-2008 12:38 PM | ||
| 93nut |
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| 05-10-2008 12:30 PM | ||
| JK | Bla bla bla. What is the back pressure on a new/good OEM vs Flowmaster or magaflow? | |
| 05-10-2008 12:17 PM | ||
| JZW |
Cut apart? We have measured back pressure and knock on them We also found the flowmaster to be more restrictive than the magnaflow! Gained 2-3psi on same sw with that change only and the knock levels were lower too! Many people and companies have tested the back pressure and flow of these mufflers and when you put a magnaflow on the car and pick up psi and spool, well its a no brainer... John |
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