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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 Flash Tuning Greater Than 21psi



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      05-28-2015, 02:26 PM   #1
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N55 Flash Tuning Greater Than 21psi

PTF...BQ/WEDGE any other flash tuners out there killing it in the N55 game?

are any of you guys able to tune past the limits of the stock tmap sensor 21-22psi using the n20 tmap?

i am running N20 right now with jb4 FF ISO/ stacked with BMS BEF.

thanks
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      05-28-2015, 03:36 PM   #2
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      05-28-2015, 09:30 PM   #3
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You switching from a stacked setup or looking for new back end flashes?
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      05-28-2015, 11:39 PM   #4
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Quote:
Originally Posted by Nugget View Post
You switching from a stacked setup or looking for new back end flashes?
I would like to test a flash only setup no meth, after I get the ATM fmic.

My car is running pretty good on 21 psi targets from 3.5k-redline just every now and then under a multi gear WOT pull it hits limp or stutters a little at shift.

In my logs everything looks great, trims look ok (on cyl 1 LOL) timing AFR is lean n mean ..... Etc etc just would like to try a flash only tune IF someone can tune N55 with the n20. I don't want to be capped at 21psi though so I may be waiting to try the flash only route. I do have to give props to dzenno after seeing houtan latest logs on 91 octane. He is dct FBO 135i stock snail boosting 21 down low and holding 15psi at 5400-5700 rpms. This is no meth or E85 and absolutely no timing issues on any cyl. He also has a solid e50 tune from PTF too.... Just would like to do my own "testing" how's your car?
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      05-29-2015, 01:05 AM   #5
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How are you going to sort fuelling if you ditch meth? I am sure the meth is sorting a few psi of fuelling if you run 21 psi till redline.

Also do you want to run 21 psi till redline daily? I like the idea i can run 15 psi daily and up it when i feel like it.
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      05-29-2015, 08:53 AM   #6
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Cobb doesn't give access to the TMAP sensor scaling table, I asked if it was in the works and got a solid "no".. You will be able to tune above the TMAP limit but you'll be blind as to how much boost you're actually running without an external sensor.. Tap the intake manifold? I think with the right tune you could use the jb4 simply to handle the n20 TMAP sensor and maybe as a meth controller. Probably the route I'd like to eventually go.
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      05-29-2015, 10:33 AM   #7
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Quote:
Originally Posted by Darkhold View Post
How are you going to sort fuelling if you ditch meth? I am sure the meth is sorting a few psi of fuelling if you run 21 psi till redline.

Also do you want to run 21 psi till redline daily? I like the idea i can run 15 psi daily and up it when i feel like it.
i dont mind running high boost daily as long as its smooth part throttle. i dont think the meth is helping bc if i turn it off i dont get cut outs or misfires....also theres the other S2 car that just posted 22psi on pump gas which is impressive as hell no meth etc etc
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      05-29-2015, 10:35 AM   #8
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Link to that? 22 psi on pump at what rpm? It sure will be hot in those cilinders
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      05-29-2015, 12:01 PM   #9
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Quote:
Originally Posted by Darkhold View Post
Link to that? 22 psi on pump at what rpm? It sure will be hot in those cilinders
its in the pure S2 thread a page back
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      05-29-2015, 01:48 PM   #10
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Quote:
Originally Posted by Newguy123
Quote:
Originally Posted by Darkhold View Post
Link to that? 22 psi on pump at what rpm? It sure will be hot in those cilinders
its in the pure S2 thread a page back
First want to see some logs of that
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      06-02-2015, 03:41 AM   #11
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Quote:
Originally Posted by Newguy123 View Post
I would like to test a flash only setup no meth, after I get the ATM fmic.

My car is running pretty good on 21 psi targets from 3.5k-redline just every now and then under a multi gear WOT pull it hits limp or stutters a little at shift.

In my logs everything looks great, trims look ok (on cyl 1 LOL) timing AFR is lean n mean ..... Etc etc just would like to try a flash only tune IF someone can tune N55 with the n20. I don't want to be capped at 21psi though so I may be waiting to try the flash only route. I do have to give props to dzenno after seeing houtan latest logs on 91 octane. He is dct FBO 135i stock snail boosting 21 down low and holding 15psi at 5400-5700 rpms. This is no meth or E85 and absolutely no timing issues on any cyl. He also has a solid e50 tune from PTF too.... Just would like to do my own "testing" how's your car?
Good luck.
My car is the same. Fast but really inconsistent.
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      06-06-2015, 09:14 PM   #12
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That's me-22psi on 93 to redline
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      06-06-2015, 09:18 PM   #13
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Don't know how to post a previous thread-
Page 18 is copy of my dyno- it was posted from pure
Just got upgraded DV- must say, I notice the diffeprence and if Cobb ever lets us go above 22, I already have my n20 tmap waiting. Haha.
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      06-07-2015, 12:38 PM   #14
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Has anyone tried emailing Cobb for a potential patch? They were extremely helpful when I had my EVO and needed to open a previously locked portion of the ECU. They sent me a custom patch file with the parameters I wanted to modify opened so I could make changes via ATR. The next update of their software had them opened as well because it solved a common issue we were having. Just a thought.
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