Truck exhaust & MPG question - K-Bikes.com - Excellence in Motion
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Feb 2nd, 2009, 4:51 pm Thread Starter
 
Join Date: Nov 2005
Posts: 193
Truck exhaust & MPG question

For you guys who are all knowing, I bought a used truck recently with dual exhaust. It sounds really awesome. I've always thought that if an engine breaths easier, it gets better milage per gallon. One of my co-workers said the opposite occurs, and one of my co-workers agreed with me. What is the real scoop?

Thanks!
Captain K12R is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Feb 2nd, 2009, 11:08 pm
Addict
 
Doru-in-Romania's Avatar
 
Join Date: May 2006
Location: Bucharest, , Romania
Posts: 434
it's not like that, an engine needs backpressure from the exhaust. in other words, with straight pipes you might loose power and mpg.


2010 R1200RT
2009 X6
2010 X1
former and future k owner

Last edited by Doru-in-Romania; Feb 2nd, 2009 at 11:26 pm.
Doru-in-Romania is offline  
post #3 of 7 (permalink) Old Feb 4th, 2009, 1:42 am
Looking for better limits...
 
Razel's Avatar
 
Join Date: Jun 2003
Location: Fremont, CA, USA
Posts: 5,163
If you're looking for low-end pulling power, narrow long exhaust tubes are what you want. Back-pressure will help with the low-end grunt. Top end performance? Wide, short header pipes to the collector, eliminating the backpressure and increasing the air flow out will bring on the top end performance. Thing is, now often do you run the engine at the top end of the RPM range?



100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

Ray
2010 K1300GT Royal Blue
2003 K1200GT Orient Blue (for sale)
2007 G650 X-Challenge

IBA #34158

Be a K-Bikes Supporter

I work for Keyser Söze
Razel is offline  
Sponsored Links
Advertisement
 
post #4 of 7 (permalink) Old Feb 4th, 2009, 3:54 am
Super Moderator
 
OSM62's Avatar
 
Join Date: Jun 2004
Location: Coesfeld, , Germany
Posts: 336
I have a ?

how many MPG make your Truck?

i drive a MB Actros with 40 tons. The actros makes 7,13 Miles per Gallon.
OSM62 is offline  
post #5 of 7 (permalink) Old Feb 4th, 2009, 5:12 am
Strafist
 
grifscoots's Avatar
 
Join Date: Aug 2006
Location: Outside New Braunfels, TX, USA
Posts: 2,544
Quote:
Originally Posted by Captain K12R
For you guys who are all knowing, I bought a used truck recently with dual exhaust. It sounds really awesome. I've always thought that if an engine breaths easier, it gets better milage per gallon. One of my co-workers said the opposite occurs, and one of my co-workers agreed with me. What is the real scoop?

Thanks!
What kind of truck? Year, 4 wheel drive, chipped, breather?

Nowadays, dual exhausts are not truly dual exhaust. They usually dual off the cat. The catalytic convertor costs some bucks and to truly dual you'd need two. Unless you're not afraid to use a torch, no one will drop the cat from your truck. The newer trucks are now closed loop, so we're talking about multiple O2 sensors.

Anyway, your truck is more than likely dualed from the cat, which is a choke point, so likely has no huge effect other than sound.

-=grif=-
What was that middle thang?
grifscoots is offline  
post #6 of 7 (permalink) Old Feb 4th, 2009, 6:41 am Thread Starter
 
Join Date: Nov 2005
Posts: 193
My beast is a 1999 Chevy Silverado 1500, 4x4, V8. I figured I'm getting 15-16 mpg. I'll have to look under it to see where it splits from. Thanks Guys!
Captain K12R is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the K-Bikes.com - Excellence in Motion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
another exhaust question for all WOODHEAT K12/1300R/R-Sport 24 Dec 28th, 2008 8:05 pm
Exhaust repack question rjoelshipp K1200RS/GT (Classic) 9 Sep 7th, 2008 7:16 pm
Exhaust question agin WOODHEAT K12/1300R/R-Sport 2 Jun 2nd, 2008 11:22 pm
Another exhaust question... Falconfire K12/1300GT (Next Gen) 5 Apr 27th, 2008 5:13 pm
Exhaust question. bbenn75820 K12/1300S 5 Mar 11th, 2008 4:26 am

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome