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      01-16-2013, 02:42 PM   #1
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N55 5" CPE Downpipe Dyno

N55 JB4 ISO, BMS intake, and around 50% E85 and the CPE 5" DPs

Peak power gains were around 12whp with as much as 25whp in areas under the curve. Peak torque gains were around 20wtq with as much as 40wtq in areas under the curve.





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      01-16-2013, 04:42 PM   #2
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Good results in terms of area under the curve.

What is that dip in power above 6000 rpms for both runs with the downpipe?
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      01-16-2013, 08:04 PM   #3
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How come the 135 with the ISO JB4 had 389 whp and 470 WTQ?
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      01-16-2013, 09:07 PM   #4
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Quote:
Originally Posted by CombatNinja View Post
Good results in terms of area under the curve.

What is that dip in power above 6000 rpms for both runs with the downpipe?
They were doing some fuel pressure tuning at that RPM during the runs.

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      01-16-2013, 09:07 PM   #5
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Originally Posted by mashimarho View Post
How come the 135 with the ISO JB4 had 389 whp and 470 WTQ?
It has an intercooler and the DCT puts more power to the ground vs. the steptronic. The 135i also has half the miles.

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      01-16-2013, 09:11 PM   #6
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Originally Posted by Mike@N54Tuning.com View Post
It has an intercooler and the DCT puts more power to the ground vs. the steptronic. The 135i also has half the miles.

Mike
I see... Thanks!
Also, real quick... What the best amount of e85 to use on my 2012 e92 335xi N55.
Jb4 stg 2, BMS dp, BMS intake, exhaust, ER cp.
Most likely running map 5.

No ISO mod yet, I don't know of that will affect it.
But, I've been doing 40/60... e85/93 octane.

Intercooler soon. Maybe 50/50?
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      01-16-2013, 09:35 PM   #7
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Quote:
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I see... Thanks!
Also, real quick... What the best amount of e85 to use on my 2012 e92 335xi N55.
Jb4 stg 2, BMS dp, BMS intake, exhaust, ER cp.
Most likely running map 5.

No ISO mod yet, I don't know of that will affect it.
But, I've been doing 40/60... e85/93 octane.

Intercooler soon. Maybe 50/50?
3 gallons and map 2.. E85 harness you should be able to go 50/50 but I would alternate every 2 fill ups works straight up 93 octane. 50/50 mix with map5, I run map 7 at times.
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      01-16-2013, 11:20 PM   #8
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3 gallons and map 2.. E85 harness you should be able to go 50/50 but I would alternate every 2 fill ups works straight up 93 octane. 50/50 mix with map5, I run map 7 at times.
Yes, I have the e85 harness adapter. So, I will probably be able to go 50/50 on map 5 and 7.
What do you mean when you say alternate every 2 fill ups works straight up 93 octane?
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      01-16-2013, 11:43 PM   #9
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Are downpipes a part of the exhaust system? If i bought a new exhaust system would downpipes come with it? Or can any downpipe fit any exhaust system?
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      01-17-2013, 05:14 AM   #10
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They are technically part of the exhaust but no system is going to include the downpipes. They all use stock mounting points and hardware so there is no issue mating them up.
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      01-17-2013, 11:11 AM   #11
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Yes, I have the e85 harness adapter. So, I will probably be able to go 50/50 on map 5 and 7.
What do you mean when you say alternate every 2 fill ups works straight up 93 octane?
I mean not to go 50/50 on every fill up. One or two times of 50/50 fill up and then flush it out with one or two fill ups of straight 91/93 (whichever available in your area).
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      01-17-2013, 11:16 AM   #12
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I mean not to go 50/50 on every fill up. One or two times of 50/50 fill up and then flush it out with one or two fill ups of straight 91/93 (whichever available in your area).
Thanks for clearing that up. You run map 7 on 50/50 as well? Isn't map 7 race gas? 100+ octane? How is that compared to map 5 (other than boost levels).
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      01-17-2013, 11:34 AM   #13
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Quote:
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Thanks for clearing that up. You run map 7 on 50/50 as well? Isn't map 7 race gas? 100+ octane? How is that compared to map 5 (other than boost levels).
Map7 is for race gas but I figure since e85 and 93 mix should increase the octane level then why not try it once in a while. Map 7 runs great with even better turbo feedback and car feels even quicker than map5. The ISO and e85 has made the acceleration, less turbo lag and torque a lot more noticable.
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      01-17-2013, 11:40 AM   #14
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Map7 is for race gas but I figure since e85 and 93 mix should increase the octane level then why not try it once in a while. Map 7 runs great with even better turbo feedback and car feels even quicker than map5. The ISO and e85 has made the acceleration, less turbo lag and torque a lot more noticable.
Hmm.... I will try it out. I guess it can't hurt. Can't wait for the ISO mod too!
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      01-17-2013, 02:48 PM   #15
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Hmm.... I will try it out. I guess it can't hurt. Can't wait for the ISO mod too!
What are you waiting for?
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      01-17-2013, 03:40 PM   #16
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What are you waiting for?
Warmth.
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      01-17-2013, 04:19 PM   #17
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Warmth.
Lol I understand.
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