Headers Thread - Page 5 - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 08-20-2019, 09:41 AM   #81
rkneeshaw
Registered User
 
Join Date: Oct 2008
Location: Northern Michigan
Posts: 1,649
My Ride: 330i ZHP
This is a better comparison using my dyno data between ss-reps (ebay) and bimmerbrakes gen 3 headers



I dyno'd on different days so the power numbers aren't comparable, but the torque curve should be, and this chart focuses down on that specifically.

Again, this is a supercharged application, NA results might be slightly different? But the gen3's appear to create more torque higher in the RPM range than the ss-reps, and the ss-reps make better torque in the lower RPMs, counter to a "conventional internet wisdom" that I've found.
__________________
2003 BMW 330i ZHP
ESS Twin Screw Stage 2+ - Wavetrac - Headers - Borla - BMW Performance
Turner Motorsports - Powerflex - Hawk Performance

Build thread: https://forum.e46fanatics.com/showthread.php?t=696662
Wheelwell: 2003 BMW 3 Series
Fuelly: 2003 BMW 330i ZHP

Last edited by rkneeshaw; 08-20-2019 at 09:42 AM.
rkneeshaw is offline   Reply With Quote
Old 08-20-2019, 12:43 PM   #82
Geo31
Ironman
 
Join Date: Mar 2003
Location: Willis, TX, USA
Posts: 4,477
My Ride: 98 M-Z3, 01 325iT
Actually, if you used an inertial dyno like a Mustang or Dynojet, they measure hp directly and calculate torque, unlike on a brake dyno. So, hp numbers, if conditions were at least similar and corrections applied properly, then hp numbers will be comparable.
__________________
George Roffe

Swim: 2.4 Miles
Bike: 112 Miles
Run: 26.2 Miles
Brag: For the rest of your life


Geo31 is online now   Reply With Quote
Old 08-21-2019, 08:42 AM   #83
rkneeshaw
Registered User
 
Join Date: Oct 2008
Location: Northern Michigan
Posts: 1,649
My Ride: 330i ZHP
Quote:
Originally Posted by Geo31 View Post
Actually, if you used an inertial dyno like a Mustang or Dynojet, they measure hp directly and calculate torque, unlike on a brake dyno. So, hp numbers, if conditions were at least similar and corrections applied properly, then hp numbers will be comparable.
The two dyno sessiosn were both on a dynojet, but they were different dynojets at different locations and ambient temps were not being measured at the first dyno (they were at the second) and were different by about 15-20 degrees F. So there's enough variables there that I didn't think it was a good comparison for power output. I definitely didn't feel that I had lost power after changing the headers, I actually thought (by feel) that the bimmerbrakes were a little stronger... but you know how accurate feel is...
__________________
2003 BMW 330i ZHP
ESS Twin Screw Stage 2+ - Wavetrac - Headers - Borla - BMW Performance
Turner Motorsports - Powerflex - Hawk Performance

Build thread: https://forum.e46fanatics.com/showthread.php?t=696662
Wheelwell: 2003 BMW 3 Series
Fuelly: 2003 BMW 330i ZHP
rkneeshaw is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is OFF



All times are GMT -5. The time now is 02:01 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
(c) 1999 - VerticalScope Inc. All rights reserved.