How to core exhaust F4 312 - MVAgusta.net
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 07-25-2011, 05:48 AM Thread Starter
New Member
 
damomol's Avatar
 
Join Date: Aug 2010
Posts: 4
How to core exhaust F4 312

Does anyone kow how to core the exhaust for a 312 (2009) and also what the downsides (if any) are?

Aftermarkets are just too expensive if you want to keep the 4 pipes out of the back. I have searched the web for info. but can't seem to find any apart from a reference to possible loss of mid range. If anyone has any information / thoughts then it / they would be much appreciated.
damomol is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 07-25-2011, 06:01 AM
Cyber SPOTTER
 
MVista's Avatar
 
Join Date: Nov 2009
Location: Australia, NSW
Posts: 6,101
Smile Everything you always wanted to Know but were Afraid To Ask

http://www.mvagusta.net/forum/showthread.php?t=28589

And welcome to the forum


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MVA - Maserati Vespa
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Agusta
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MVista is offline  
post #3 of 5 (permalink) Old 07-25-2011, 07:33 AM
lee
Senior Member
 
lee's Avatar
 
Join Date: Oct 2007
Location: As far away from mankind as I can get
Posts: 5,076
Been alot of posts about "coring" the mufflers. Aside from making it louder I personally feel that it's not the greatest idea as it will disrupt the smooth flow of gases through the pipe. I doubt the average guy could tell the difference in performance if there even is any.

The mind equates louder with more power when in fact it could be less. For example HD drag pipes are loud as hell but cause a loss of power below anything other than high rpm.

Search the forum for guys that have done it and look for dyno comparisons between stock and cored.

Getting rid of the "cat" is a much better way to gain some power. Keep in mind that if you change the flow characterics of the exhaust you will have to retune the fuel mapping to compensate for the increased gas flow and hence the amount of air being drawn in.

I got mine. Boy do I ever got mine.

Last edited by lee; 07-25-2011 at 07:36 AM.
lee is offline  
post #4 of 5 (permalink) Old 07-25-2011, 07:48 AM Thread Starter
New Member
 
damomol's Avatar
 
Join Date: Aug 2010
Posts: 4
Thanks for your comments. Will have do some more research and have a think about whether to go down that road.
damomol is offline  
post #5 of 5 (permalink) Old 07-25-2011, 04:40 PM
Established Member
 
Join Date: May 2008
Location: North Carolina
Posts: 174
I have a 2000 F4S and I was told the pipes were sent to England to be cored and polished. After about six months of ownership and about 1,300 miles I find them too loud and the cause a closed throttle backfire. That is usually the case when you are running too lean. I have ridden with my friends who have a 2002 and a 2006 and they are quieter and do not backfire. I would never make this modification. As Lee said it may sound like more power but I am not convinced it is and anyway I would never notice. Not enough difference to be able to feel by the seat of your pants. I Know from past experience sometimes modifications like this reduce power. Proven in a roll on with identical bikes, Hondas not MVs.

Jim
Capo is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to use all of the features of the MVAgusta.net site, 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 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
Trackbacks are On
Pingbacks are On
Refbacks are On

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