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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 520rw on RBs!



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      11-01-2012, 08:41 PM   #23
nailer335
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Quote:
Originally Posted by spool twice
great #'s considering the dyno was on an automatic n54 and still running the stock catback!
Has the stock catback been shown to be very restrictive at any power level on this platform? (Without secondary cats)
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      11-01-2012, 08:42 PM   #24
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Originally Posted by nailer335 View Post
Has the stock catback been shown to be very restrictive at any power level on this platform? (Without secondary cats)
At 520WHP, having a crush bent <2.5" mid section could pose some restriction. I believe this run was with secondary cat's though.
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      11-01-2012, 08:42 PM   #25
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Nice numbers!
What will stage 3 put down?
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      11-01-2012, 08:42 PM   #26
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Mustang dyno.
Right on. Mustangs are the real man's dyno
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      11-01-2012, 08:48 PM   #27
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Originally Posted by nailer335 View Post
Has the stock catback been shown to be very restrictive at any power level on this platform? (Without secondary cats)
At 520WHP, having a crush bent &lt;2.5" mid section could pose some restriction. I believe this run was with secondary cat's though.
Interesting. Definitely a bit more power to be had with this being the case
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      11-01-2012, 08:51 PM   #28
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Right on. Mustangs are the real man's dyno
mustang dyno FTW
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      11-01-2012, 08:52 PM   #29
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At 520WHP, having a crush bent <2.5" mid section could pose some restriction. I believe this run was with secondary cat's though.
Terry confirmed on his site that he is running an N55 midpipe which don't have secondary cats in it.
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      11-01-2012, 09:03 PM   #30
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Terry confirmed on his site that he is running an N55 midpipe which don't have secondary cats in it.
Oh ok. Thanks
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      11-01-2012, 10:15 PM   #31
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Can't wait for the Airstrip!!!!!!!!
Me too...My car is alive with the single, I drove it a bit today, now time to get it tuned.
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      11-01-2012, 10:43 PM   #32
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Can't wait for the Airstrip!!!!!!!!
Me too...My car is alive with the single, I drove it a bit today, now time to get it tuned.
Lots of tuning happening the next few days!!!!!!!!
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      11-02-2012, 05:43 PM   #33
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how do you know this? have you tested 100% e85?
Terry mentioned it on the other forum.
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      11-13-2012, 12:12 PM   #34
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Terry mentioned it on the other forum.
They think there is a bit more power in there but comparing the logs of the 500rw run vs the 520rw run. The extra advance, cooling benefits from meth, and extra boost, all combined for only another 20rw. So while there is probably a little more power in there they think it's getting towards the end of the line without additional hardware changes. There would be plenty more torque if someone wanted it.

Notice in the E60 only log high fuel pressure is dropping below 10, while with meth flowing it's staying on target above 15, it's that high fuel pressure drop that is preventing them from running E85 instead of the E60 at the moment.

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      11-13-2012, 05:34 PM   #35
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I've been reading this forum for 10 min and I already know what mods I *must* *have* before I even buy my car!
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