Modifications - Performance Discuss aftermarket and DIY performance modifications

exhaust confusing me

Old 03-09-2015, 01:05 PM
  #1  
Junior Member
Squid
Thread Starter
 
Join Date: Mar 2015
Posts: 4
flag_pole is on a distinguished road
exhaust confusing me

let me start this off by stating I own a 98 vtr 1000 (somewhat obvious) anyways it's all stock except for a +3 on the rear sprocket. I've been wanting to purchase slip on pipes but haven't had the needs to get them since I would like to purchase the jets at the same time. so I decided to say **** it, and pull the heavy *** mufflers off and run it so to say straight piped.

the bike ran rich with the stock pipes and has leaned itself out to a good spot. a little popping but nothing I wasn't expecting (except for how obnoxiously loud it is)

I know I know straight piping is so called bad for your motor I've heard the lecture. my question comes down to, everyone says that you lose low end torque and horsepower. I've noticed the opposite. okay maybe I lose torque till about 2.5-3k rpm. but it seems like no mufflers has opened a new motor. has no problem standing up on one wheel up to 3rd with no clutch and up to 5th with minor clutch. and I've noticed a major upgrade in acceleration and, as well, top end.

I am confused because I have read all these downsides about straight piping (performance wise) and yet it has made a enormous difference in my bike. any one else done this and gotten the same or different results?
flag_pole is offline  
Old 03-09-2015, 01:57 PM
  #2  
Senior Member
Back Marker
 
sjscicluna's Avatar
 
Join Date: Jul 2012
Location: Melbourne, Australia
Posts: 143
sjscicluna is on a distinguished road
inturesting
sjscicluna is offline  
Old 03-09-2015, 02:41 PM
  #3  
Senior Member
SuperSport
 
thetophatflash's Avatar
 
Join Date: Jan 2005
Location: Nooksack WA
Posts: 829
thetophatflash
A likely problem could be "shots fired" by your neighbors. I once tested my '53 Triumph with the mufflers off. The flames were great and my neighbors stood on their porches and waved, sort of. lol Also, you may burn an exhaust valve with zero muffler back pressure.
thetophatflash is offline  
Old 03-09-2015, 03:01 PM
  #4  
Senior Member
SuperBike
 
Join Date: Feb 2013
Posts: 1,509
thedeatons is on a distinguished road
Back pressure is your friend. Read some technical articles on four stroke exhaust waves, back pressure, etc.

Unless you have dyno charts proving you gained horsepower, i'm guessing you actually lost horsepower and your brain is fooling you because of the new sound.

Removing your mufflers is not a fix for a rich condition. Fix your jetting with the mufflers on.

James
thedeatons is offline  
Old 03-09-2015, 03:42 PM
  #5  
Thread Killer
SuperBike
 
Join Date: Apr 2013
Location: Geneseo, IL
Posts: 1,607
VTR1000F is on a distinguished road
No 3rd gear, 4th gear & 5th gear wheelie videos, then it didn't happen.

Not calling you a liar, I just want to see some wheelie videos.
VTR1000F is offline  
Old 03-10-2015, 02:17 AM
  #6  
Senior Member
SuperBike
 
kenmoore's Avatar
 
Join Date: Mar 2012
Location: New South Wales Australia
Posts: 1,521
kenmoore is on a distinguished road
Me thinks the auditory senses are fooling you into thinking that the bike is performing better because of the sound, sort of like bigger is better.

My bike has many mods and will loft the front wheel in third under the right conditions without abuse.

Get some decent cans, re jet her and enjoy the bike .

I know for a fact that loud pipes save lives, however you are taking it to the extreme.

If you can't afford to buy new cans core the originals, there are many posts about it and re jet it before you harm your engine, your ear drums and your relationship with your neighbours.

By the way I see this is your first post so welcome to the fold and enjoy your VTR as they are an amazing bike that just give and give especially if you do!

Welcome aboard and enjoy the ride, be warned these things are an addiction.
kenmoore is offline  
Old 03-10-2015, 09:05 AM
  #7  
Junior Member
Squid
Thread Starter
 
Join Date: Mar 2015
Posts: 4
flag_pole is on a distinguished road
Originally Posted by VTR1000F View Post
No 3rd gear, 4th gear & 5th gear wheelie videos, then it didn't happen.

Not calling you a liar, I just want to see some wheelie videos.
I will try and get some videos having nasty weather in Texas ATM so ride time is sadly limited for the moment


yes I know bad bad for the exhaust valve runnin no muffler.

I was considering doing some work on the stock cans to de baffle them just don't have the right tools in my garage now.

I'm not fancy enough to have access to a dyno so It is all by the seat of my pants. sounding louder and thinking I have more power makes sense I'm just not fully sold on it yet.

and yes. this bike is the biggest addiction I have. multiple nights have I pondered about selling her for a 600 or a newer 1000 but I just cant get rid of the hawk. somethin about it has me comin back for more
flag_pole is offline  
Old 03-10-2015, 09:57 PM
  #8  
Senior Member
MotoGP
 
smokinjoe73's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 4,898
smokinjoe73 is on a distinguished road
My vote for the sake of the motorcycling community is that you cease and desist running straightpipes. Just not good for the planet.
smokinjoe73 is offline  
Old 03-11-2015, 10:00 AM
  #9  
Junior Member
Squid
Thread Starter
 
Join Date: Mar 2015
Posts: 4
flag_pole is on a distinguished road
Originally Posted by smokinjoe73 View Post
My vote for the sake of the motorcycling community is that you cease and desist running straightpipes. Just not good for the planet.
I plan on it. I rode it last night and ragged out that throttle and I couldn't hear well once I arrived home. I'm going to probably just core out the stock pipes. but who knows when that will be considering I just found out my right fork seal is completely blown. joy! time to decide which front end I want to replace it with since I've read the stock setup isn't the greatest
flag_pole is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
7moore7
Technical Discussion
16
02-17-2011 10:05 AM
Just_Nick
Modifications - Performance
5
06-24-2010 08:52 PM
Anwar
Technical Discussion
8
06-05-2010 07:50 PM
HisHawkiness
General Discussion
5
04-05-2008 12:04 PM
SlowHAWK
General Discussion
13
10-28-2007 08:33 PM


Thread Tools
Search this Thread
Quick Reply: exhaust confusing me


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.