Back Pressure? - TwoWheelForum: Motorcycle and Sportbike forums
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 05-06-2006, 10:47 PM Thread Starter
 
Join Date: Jun 2005
Posts: 68
Back Pressure?

Hey yall,
I am thinking about getting rid of my cat on the bike, and making it a strait pipe, also getting rid of the muffler, and also making it a strait pipe. Someone was telling me that if I don't have back pressure it might decrease the HP/TQ anyone know about this?

Thanks,
Bill
wgc_3 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 05-06-2006, 10:58 PM
First 1000 Member
 
Join Date: Jul 2004
Location: Louisville, KY
Posts: 408
Quote:
Originally Posted by wgc_3
Hey yall,
I am thinking about getting rid of my cat on the bike, and making it a strait pipe, also getting rid of the muffler, and also making it a strait pipe. Someone was telling me that if I don't have back pressure it might decrease the HP/TQ anyone know about this?

Thanks,
Bill

Running a wide open exhaust and not doing any carb (or fuel injection) mods is a good way to test how long your motor will last before it goes boom. However, properly tuned, you may loose a little on the bottom end and gain some up top.

Larry

Rarely is the question stupid, but sometimes the answer is you need to run everything you read online through your own personal BS meter to determine if it makes sense to you.
larryg is offline  
post #3 of 8 (permalink) Old 05-07-2006, 08:56 AM
V-Twin Moddin
 
Gas Man's Avatar
 
Join Date: Jul 2004
Location: SE Michigan
Posts: 38,916
I was thinking the same thing.

You will definately loose the bottom end power for sure.

But the real question is WHY?

I hope its not for the sound. Cause the loudest exhaust is not always the best sounding. D&D is prime example of that!




-Chris
aka Gas Man



Was: 2002 Kaw ZX-9R
IS:


is me till the
Gas Man is offline  
Sponsored Links
Advertisement
 
post #4 of 8 (permalink) Old 05-07-2006, 03:33 PM Thread Starter
 
Join Date: Jun 2005
Posts: 68
The reason is I am trying to find a cheap way to get hp/tq, this is why I'm asking. I have the know how and knowledge, but I don't know what it will do to the bike.

Looks like I have my answer and its a bad idea, and there is a reason why some slip ons are a grand.

But my zx-6 '05 does have a cat, can I take out the cat to get a few extra hp?

Thanks,
Bill
wgc_3 is offline  
post #5 of 8 (permalink) Old 05-07-2006, 04:31 PM
V-Twin Moddin
 
Gas Man's Avatar
 
Join Date: Jul 2004
Location: SE Michigan
Posts: 38,916
You can but if you do that you will have to get a power commander and get it remapped. Which you'll have to do regardless of what you do above and beyond a slip on.




-Chris
aka Gas Man



Was: 2002 Kaw ZX-9R
IS:


is me till the
Gas Man is offline  
post #6 of 8 (permalink) Old 05-08-2006, 07:51 AM
 
Join Date: Oct 2004
Posts: 6,147
Hey Larry... Good to see!!
bumblebee is offline  
post #7 of 8 (permalink) Old 05-09-2006, 11:06 PM
First 1000 Member
 
Join Date: Jul 2004
Location: Louisville, KY
Posts: 408
Quote:
Originally Posted by bumblebee
Hey Larry... Good to see!!
Thanks, I've been swamped and hardly have time to get online anymore.

Larry

Rarely is the question stupid, but sometimes the answer is you need to run everything you read online through your own personal BS meter to determine if it makes sense to you.
larryg is offline  
post #8 of 8 (permalink) Old 05-10-2006, 06:09 PM
 
Join Date: Dec 2005
Posts: 433
not only will just screw up your bottom end (possibly)....your motor will be hurting within no time.....your powerband will be all over the place, you could possibly lean out the motor too much...increase in power..yes!...detonation..YES!

and you will also go deaf because its going to be VERY VERY loud and raspy VERY VERY loud....you will cringe when you crack the throttle and get up to 7-10k rpms!!
GixxerNHemi is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TwoWheelForum: Motorcycle and Sportbike forums 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



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

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