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2015+ S550 Mustangs
2015+ S550 Mustang Talk
CatBack Systems Losing Power
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<blockquote data-quote="beefcake" data-source="post: 14590515" data-attributes="member: 1692"><p>Baseline done. 3 solid pulls back to back. </p><p></p><p>363.09 / 346.11</p><p>364.82 / 344.11</p><p>363.84 / 347.78 </p><p></p><p>Knock sensor was happy throughout the pulls. </p><p></p><p>Adding about 2 degrees across the board. Fuel was spot on. At peak hp timing was about 24.5</p><p></p><p>now the results</p><p></p><p>4 - 367.1 / 351.25</p><p>5 - 364.46 / 350.58</p><p>6 - 364.30 / 345.79</p><p></p><p>so there you have it, average power gain across the board, not much, but not a loss. and the torque picked up across the board.</p><p></p><p>just as I said, on average, a cat back is mainly for sound</p><p></p><p>I also had a board member here who is thinking about an exhaust system to watch the dyno / install process, i'll be posting more info / graphs later</p><p></p><p>also, for those that believe the cores are a restriction, the inside diameter of the stock exhaust is 2.125, so the stainless works at their smallest point is 2.36 and the larger areas to the outside is 2.65 I believe</p><p></p><p>all larger than the factory pipes and connection point.</p><p></p><p>first runs were done at 6:25, 6:26, 6:27</p><p>second runs were done at 7:37, 7:38, 7:39</p><p></p><p>when I have a minute, i'll post more data for everyone. I have pics of the factory exhaust as well.</p><p></p><p>that gives us an average of the 3 runs before of</p><p></p><p>363.916 / 346</p><p></p><p>an average after of</p><p></p><p>365.286 / 349.206</p><p></p><p>again, as with previous model years, about what I've expected </p><p></p><p>that's about as real world as it gets.</p><p></p><p>dyno, install, dyno an hour later, done....</p><p></p><p>I'm happy to share all .drf files and all 6 log files with anyone that wants them.</p></blockquote><p></p>
[QUOTE="beefcake, post: 14590515, member: 1692"] Baseline done. 3 solid pulls back to back. 363.09 / 346.11 364.82 / 344.11 363.84 / 347.78 Knock sensor was happy throughout the pulls. Adding about 2 degrees across the board. Fuel was spot on. At peak hp timing was about 24.5 now the results 4 - 367.1 / 351.25 5 - 364.46 / 350.58 6 - 364.30 / 345.79 so there you have it, average power gain across the board, not much, but not a loss. and the torque picked up across the board. just as I said, on average, a cat back is mainly for sound I also had a board member here who is thinking about an exhaust system to watch the dyno / install process, i'll be posting more info / graphs later also, for those that believe the cores are a restriction, the inside diameter of the stock exhaust is 2.125, so the stainless works at their smallest point is 2.36 and the larger areas to the outside is 2.65 I believe all larger than the factory pipes and connection point. first runs were done at 6:25, 6:26, 6:27 second runs were done at 7:37, 7:38, 7:39 when I have a minute, i'll post more data for everyone. I have pics of the factory exhaust as well. that gives us an average of the 3 runs before of 363.916 / 346 an average after of 365.286 / 349.206 again, as with previous model years, about what I've expected that's about as real world as it gets. dyno, install, dyno an hour later, done.... I'm happy to share all .drf files and all 6 log files with anyone that wants them. [/QUOTE]
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CatBack Systems Losing Power
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