Backpressure?? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-28-2003, 09:16 PM
novass's Avatar
Member
 
Join Date: May 2001
Location: Canada
Posts: 71
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Question Backpressure??

I was reading all about the exaust sound questions, and I was goint to post this question under it... but I want this to be seen.. so I started a new topic.

OK, I understand that on a race car when noise is not a issue they run (many do) open headers.

But in the thread about getting THAT sound, a few mention back pressure for a street rod. WHY??
Is this just to control the sound levels?

I am finishing up my build. A `63 Noavss 400 SB with a few go fast godies. A pair of hooker super comp headers and I am looking to get a mandrel bent exhaust with either a X of H pipe dumping under the car just before the rear axel or turn outs just before the rear tire.
I was looking at Borla mufflers as no one around me has em.
Everyone runs FLOWMASTER or DYNOMAX sysytems.
Now as far as I know the BORLAS are a single straight threw free flow designe.. so what of BACK PRESSURE??
Do I really need to wory about this on a 11:1 compression car?
(no cats are needed,, and I am not looking to add em.)

Any help with this would be great.. cause I am right now in the mind set to run free flows. Boys in blue are pretty slack around my parts unless you start running hard on the street.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-28-2003, 11:00 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 4,815
Wiki Edits: 0

Thanks: 0
Thanked 60 Times in 48 Posts
Backpressure improves torque production below the peak torque curve and assists in smoothing torque impulses which reduces vibration and combustion pressure spikes in the combustion chamber by the action of exhaust dilution...up to a point.
__________________
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 01:45 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.