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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 > Anyone boosting 17+?



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      06-21-2012, 03:26 PM   #1
Goldenchild
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Anyone boosting 17+?

Do u think I could have a defective jb4. I had my friend that is a tech at BMW check everything. He even did a smoke test. Pressurized the turbo and wastegate and everything checked out fine. He even updated the dme and put a new exhaust in for me since it was rattling. He knows all the mods I have done. He might be thinking the the dme is not letting it boost more the 14. Cus even with 100 octane n map7 I still only boost up to 14ish. What else do you think it could be? Has anyone else with n55 have this problem? No boost or vacuum leaks at all. I need help!!!!! I need I need 17 psi!! Please lol
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      06-21-2012, 03:33 PM   #2
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I was going to help you until I read the lol at the end. I can't stand it when a paragraph ends on lol.
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      06-21-2012, 03:44 PM   #3
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Quote:
Originally Posted by Dozhdbog
I was going to help you until I read the lol at the end. I can't stand it when a paragraph ends on lol.
I take that back then. I'm just frustrated with trying to figure it out that I gotta keep an open mind n not destroy my tool box
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      06-21-2012, 03:48 PM   #4
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I actually have no idea, but wouldn't 17psi necessitate some other changes to the engine, such as replacing some key parts with sterner stuff so the thing doesn't asplode?
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      06-21-2012, 04:05 PM   #5
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Well such great service from bms terry and the guys there. He's sending me a new one to make sure that it's not a defective problem. Hope I get this problem fixed
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      06-21-2012, 04:06 PM   #6
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My car had no problem making 17psi with my Procede... and I have the stock downpipe/cat in place. Now, when I say 17psi, I mean 17psi peak... nobody's n55 is holding 17psi to redline... they all taper down to maybe 12psi by redline due to stock turbo restrictions.
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      06-21-2012, 04:16 PM   #7
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Quote:
Originally Posted by boostd92
My car had no problem making 17psi with my Procede... and I have the stock downpipe/cat in place. Now, when I say 17psi, I mean 17psi peak... nobody's n55 is holding 17psi to redline... they all taper down to maybe 12psi by redline due to stock turbo restrictions.
I'm going to try and do some new logs today and post up from my previous ones to see if it's any better. I can't even hit 17 tho. That's my problem
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      06-21-2012, 04:18 PM   #8
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i get ~17 psi peaks with my procede! .. post up some logs for us to see and send some logs to Terry as well. I'm sure he will help you out. Logs tell you everything
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      06-21-2012, 04:34 PM   #9
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well this is a short run from the other day but a short one.
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      06-21-2012, 04:43 PM   #10
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hmm.. Thats on map 2?
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      06-21-2012, 04:47 PM   #11
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yup, i need to do a new log with the new dme update
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      06-21-2012, 04:49 PM   #12
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well map 2 is a 14 psi map so I would say you are right on target.. Put some 100 octane gas in and log some map 7 runs.. Thats what i am curious about because that is a 17 psi map..
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      06-21-2012, 04:58 PM   #13
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103 octane and 93 octane 50/50 mix and map7 I hit 17 psi.
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      06-21-2012, 05:04 PM   #14
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100 octane and i still cant hit 17. letting the car warm up now to do a log on map7 ..meanwhile im going to upload my dyno video for u guys
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      06-21-2012, 05:12 PM   #15
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dyno runs last week
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      06-21-2012, 05:19 PM   #16
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      06-21-2012, 05:21 PM   #17
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Holy shitballs Batman! Hope you got yourself one of dem newfangled aftermarket CPs sonny...else I see a limp mode ride home in your immediate future!
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      06-21-2012, 05:23 PM   #18
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er chargepipe has been on with new oring gasket to be safe
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      06-21-2012, 06:07 PM   #19
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Quote:
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er chargepipe has been on with new oring gasket to be safe
Smart man. Good luck bro!
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      06-21-2012, 06:17 PM   #20
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Quote:
Originally Posted by Dark_Knight_335
Quote:
Originally Posted by Goldenchild
er chargepipe has been on with new oring gasket to be safe
Smart man. Good luck bro!
+1 get some logs of your map 7
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      06-21-2012, 06:41 PM   #21
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Quote:
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+1 get some logs of your map 7
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      06-22-2012, 01:13 AM   #22
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I have all the mods to run map 2 from BMS + BMS intake(not a requirement) on jb4 and here are my logs with BP 93oc and Nos octane booster. I don't know why you can't run higher boost with race gas.
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