I drove my car for the last time yesterday morning (Sunday 11/19/2023)...

JPuehl

Specialist
Jul 24, 2019
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Greater Seattle area (a.k.a. Zombie Land)
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2011 135i 1M clone N55e DCT
Wow, that thing sounds awesome! Is it pretty loud just cruising around town?

That 1m style exhaust that was on your car, was the battery relocated, or any physical mods done to get the passenger side outlet to fit?

In addition to going to a split tip, do you think you'll add a second fork back on the passenger side?
It's not bad during normal cruise, I like it, but it is kind of loud, my neighbors know when I'm driving the car but I usually cruise thru my neighborhood in 3rd at low rpm to reduce the sound. For the 1M style exhaust, only the eval tank/canister was relocated to make it work. And some day I probably will run a pipe behind the diffuser to the passenger side for a tip to give it that 1M look, but it's not that high on my "list of things to do", lol. But if I find a tip I like I'll order 2 to be ready.
 
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JPuehl

Specialist
Jul 24, 2019
99
138
0
Greater Seattle area (a.k.a. Zombie Land)
Ride
2011 135i 1M clone N55e DCT
@JPuehl I can't remember if you've mentioned this in any other threads, but how would you compare response and spool of the 750 to your old ps2?
Actually, come to think of it I haven't compared logs of the 2 but I know the PS750 spools way better than I would have expected. With the PS750, since it's capable of more boost, like 28# compared to 23# on the PS2, I changed my tuning strategy to taper/ramp boost up to full 28# at 4500 rpm, rather than just flat lining boost target like I used to do with the PS2. I'll compare logs from the PS2 @ 23# to the PS750 @ 23# (on a 28# target) (before I slowed spool down) and report back what I see.
 
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JPuehl

Specialist
Jul 24, 2019
99
138
0
Greater Seattle area (a.k.a. Zombie Land)
Ride
2011 135i 1M clone N55e DCT
@JPuehl I can't remember if you've mentioned this in any other threads, but how would you compare response and spool of the 750 to your old ps2?
I was able to find a couple logs from the PS2 to compare to the PS750. Both logs were 4th gear and starting at about 3k rpm with about 3# boost at the time I went WOT. The PS2 got to 23# in about 1100 rpm or 1.5 seconds (using the Time column of the log). The PS750 did the same in about 700 rpm and 1.3 seconds. This would have been on the same section of road but of course there are environmental variables that could have affected the results. The PS2 log was taken at the end of July vs the PS750 log in February, so I can get a log in July for a closer comparison.