E90Post
 


ECS BMW
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > JB4 E85 Boost Range



Reply
 
Thread Tools Search this Thread
      08-06-2013, 07:58 PM   #1
PTek Will
Second Lieutenant
PTek Will's Avatar
United_States
7
Rep
267
Posts

Drives: 335i coupe
Join Date: Jun 2012
Location: san jose

iTrader: (0)

JB4 E85 Boost Range

Hey Guys,

The first time I tried E85 (about 30%) mixed with 91 on map 5 I hit 17 psi consistently. Now it doesn't even reach 15 psi with the same mixture. It hovers right below the 3/4 line (14.5psi?), whereas before it was about 2 ticks above 3/4. Any ideas why?
Appreciate 0
      08-06-2013, 09:03 PM   #2
BoostAddict
Banned
United_States
24
Rep
935
Posts

Drives: SGM 335i
Join Date: Jan 2010
Location: Boynton Beach, FL

iTrader: (4)

Map 5 auto tunes to conditions. Perhaps the weather was cooler last time you tried, your fuel quality was higher, or maybe it just hadn't fully adapted yet. A number of outside factors could do it.
Appreciate 0
      08-07-2013, 12:16 PM   #3
Mike@N54Tuning.com
BimmerPost Supporting Vendor
Canada
2673
Rep
54,944
Posts


Drives: 2007 335i, 2015 M3
Join Date: Dec 2008
Location: N54tuning.com

iTrader: (90)

You'd want to do a datalog to see what you're actually targeting. If the JB4 detects knock, higher temperatures, running lean, or other issues, it will lower it's target. If the target is high but boost is well below it, then that indicates another range of issues with the car. Boost leak, wastegate issue, vacuum line loose, etc.

Mike
__________________

SUMMER SIZZLER SPECIALS - CLICK HERE For ALL CRAZY SALES
N54 Catless Downpipes - 359.00 Shipped!! EVOLUTION RACEWERKS 10% OFF (+ Free Ship) PURE TURBOS - 10% OFF + Free Shipping! JB4s on SALE!! + FREE SHIP
Appreciate 0
      08-07-2013, 12:20 PM   #4
BEAR-AvHistory
2018 440M-Sport MPPSK/THP
BEAR-AvHistory's Avatar
182
Rep
2,858
Posts

Drives: 2018 440M-Sport MPPSK/THP
Join Date: Jun 2011
Location: NC - USA

iTrader: (0)

Also E85 is not exactly E85. The blend changes by state & month. You can do a search on the EPA site to get the blends & months for your state.
__________________
Kevin

2018 440M-Sport MPPSK/THP - 2017 CX-5 - 2016 Genesis R-Spec Coupe - 2013 135is Cab 6MT/JB4 - 2009 V-Star - 2009 Expedition 4X4 - 1998 Ranger 4X4 - 1965 Cobra MK-IV Dyno Tuned 477WHP - First Start. 477 WHP of BURBBLES
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 06:56 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST