04-07-2021, 01:22 PM | #1 |
MFJWADE
120
Rep 351
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Not another down pipe thread...
Featured on BIMMERPOST.com I need a bit more mid range TQ and Im on stock downpipes. I have JB4 and run Map 3 E30 with Project Gamma intake, best Dragy 60-130 6.84, best 1/4 10.45 @ 134.89 all runs in slightly neg DA. The down pipes should get me a bit deeper into the 6s but looking for feedback from anyone running catted/highflow. |
04-07-2021, 02:42 PM | #2 |
Second Lieutenant
122
Rep 243
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I have a JB4 with secondary cat deletes. installed at the same time so tough to tell if any difference other then sound.
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2020 M8 SMB full boltons and tune
2022 CT5-V Blackwing 2019 GT3RS full headers exhaust and tune 2022 Cayenne Turbo coupe Catless/ Tune 2022 Huracan STO |
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04-07-2021, 02:51 PM | #3 |
Captain
345
Rep 966
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I believe there are tests proving that removing the cats on this platform does not increase performance like other turbo engine platforms.
I recall reading a few software development companies doing back pressure tests etc. Also I think on n54tech website they post the same stating they reccomend oem over catless |
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