N54Tech.com - International Turbo Racing Discussion
PhilTrill's Avatar
PhilTrill PhilTrill is offline
New Member
Posts: 24
Join Date: Oct 2013
Car: 135', E46 M3, E36 M3, S13
Default Why isnt my WGDC maxed out? Pushing factory turbos to the limit - 03-15-2020, 06:46 PM

Targeting 24psi, I spike to 24-26psi but then taper from there. I understand stock turbos probably cant flow that to redline but shouldn't the WGDC be maxed the entire time, keeping the wastegates shut? Any opinions and input is appreciated, thanks!

(attached logs)
Attached Files
File Type: csv 200315_2019.csv (36.0 KB, 47 views)
File Type: csv 200315_1945.csv (121.3 KB, 48 views)

'08 SGM 135i | '12 C63 AMG | '95 S14 | '93 S13 | '90 S13 | '89 S13 | '80 Spitfire
Reply With Quote
Rustl3r's Avatar
Rustl3r Rustl3r is offline
Junior Member
Posts: 57
Join Date: Dec 2019
Car: 135i N54
Default 03-16-2020, 03:23 PM

WGDC won't max out because the turbo exhaust wheel would overheat and melt.

Also, you may think a turbo failure is a write-off but a broken compressor will send metal into your engine, destroying it. Proceed with caution.

'08 BSM 135i N54B30A 6AT: 133k miles
Dynamic Autowerks Stage 2+ Hybrid Turbos
JB4 + Pump_USA BEF
VRSF 3" Pippys
VRSF Relocated Hotside Intake
Vargas High Flow Outlets
VRSF J Pipe and Charge Pipe
Black Market Racing 3.5" Exhaust
BMS OCC & PCV (Boost side only)
N20 MAP Sensor
Eldor Coils
NGK 97506 @ .0020
255R 235F Pilot Super Sports on Breyton GTS-R Wheels
Motul Sport 5W40
E30 Fuel
Reply With Quote
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
Posts: 8,484
Join Date: Apr 2014
Car: E92 335XI
Default 03-16-2020, 11:16 PM

I’ve seen healthy stock Turbos w. Inlets meet that psi down low / mid range & then trail off towards redline. If the Turbos are healthy they can take abuse, but may not last.

The stock Turbos are so small and generate a lot of torque downlow- Blowing the Turbos is 1 concern, however id actually be more concerned with possibly bending a rod from all the downlow torque

Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

Forum Jump

vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2020, N54tech.com