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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 > OFT stg1 log, totally stock 08xi 6AT



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      02-14-2014, 06:49 PM   #1
ls3c6
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OFT stg1 log, totally stock 08xi 6AT

http://datazap.me/u/skubik/stg1-test...ata=1-3-4-5-10

isn't the boost low for stg1?
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      02-15-2014, 08:32 AM   #2
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Your only low on the first pull between 3200-4000 rpm where there is weirdness going on with your requested vs actual. On the last two pulls which both start at about 5000 rpm boost is not low, the taper is as advertised, Not sure if that first pull weirdness has something to do with auto trans or xi affects on load but you should run some more WOT logs in that rpm range to see if it was a fluke or something is really going on.
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      02-15-2014, 02:11 PM   #3
ls3c6
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that pull was just flooring it in 1st, no brake boost so probably thats why boost is lower in 1st but i thought the targets were higher for stg1 even up top?
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      02-15-2014, 02:40 PM   #4
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Quote:
Originally Posted by ls3c6 View Post
that pull was just flooring it in 1st, no brake boost so probably thats why boost is lower in 1st but i thought the targets were higher for stg1 even up top?
For tune only, you should only want 13-ish psi.

next log do a 3rd gear pull. usually 1-2nd are limited in psi.
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      02-15-2014, 03:36 PM   #5
stanlalee
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Quote:
Originally Posted by ls3c6 View Post
that pull was just flooring it in 1st, no brake boost so probably thats why boost is lower in 1st but i thought the targets were higher for stg1 even up top?
You peaked at 11.3 @ 6300rpm. I peaked @ 11.9 at the same rpm my last run. I don't think you have a problem. At worse you have stage 0 boost which is just 1psi less on the top end. As stated its hard to decipher noise without a 3rd or 4th gear pull. I don't know how you would do that on an automatic as I've never owned one but here is my last pull from this morning (I made some changes but nothing that should affect maximum boost targets).

http://www.datazap.me/u/stanlalee/st...d-afr-and-wgdc

See how much easier/cleaner with a single gear pull from 2000-redline. To convert those boost figures to psi at any given point use (boost figure shown-1022)x.0145. ex 2000 on the graph = (2000-1022) x .0145 or 978 x .0145 = 14.18psi. 1022 is my ambient pressure here according to the car (sea level is 1014 or something like that).

and here is an unmodified stage 1 OTS log
http://www.datazap.me/u/stanlalee/vi...-3rd-gear-pull

Last edited by stanlalee; 02-15-2014 at 03:49 PM.
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      02-15-2014, 04:19 PM   #6
ls3c6
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Oh okay, so I need intercooler down pipes and more boosts. Lol
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      02-15-2014, 06:10 PM   #7
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I'm running Stage 0 as of today. Holding off on Stage 1 until I get my charge pipe on and can throw some octane booster in with the 91 we have out here.
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