Backpressure Pt2

So comparing after cat pressures at the same power output it starts to get interesting… With the 3″ JT we had 4.4 psi max after the cat. With the Remus 3.2 psi max. This one is 60mm or almost 2-3/8″ Both of these are the same configuration. One muffler in the rear. Straight through center pipe and a flex after the downpipe. The sound is so much nicer with the Remus. I still have to find time to test a factory exhaust with and without middle muffler and with and without the downpipe.
I have been double checking all this data just to be sure and get very repeatable results. Not exactly sure why My old cat flowed so poorly with no visible damage to the core. After cat measurements are my main point here. Just trying to compare different size apples… Also as a side note While playing all this exhaust I left the 6point subframe brace off. Thinking I would be going back to all 3″, No way. So a few days of driving without the 6pt reminded me how much of a change it actually makes for steering feel and tramlining. Had to put it back on. this sort of power and plain old P6000 “winter” tires just won’t play well together. I also posted some more photos in the the http://GenuineSaab.com/Gallery

1 Comment 

  1. Branden says:

    So, just in theory, if you were to take off the cat would the backpressure be around 4.4 psi throughout?

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