I assume Renegade runs dyno tests when they design new exhaust systems. I can't see buying a new exhaust system that has not been tested, Especially when we are removing a major restriction of the CATS. I sure don't want to end up with loosing the bottom end torque. It is far more important than picking up a few HP at the top, which I rarely ever run up to.
hawke On 7/11/02 10:33 AM, "Crisler, Jon" <[EMAIL PROTECTED]> wrote: > Well, from my basic understanding of hi-performance engines, exhaust tubes > can be tuned as follows: > > smaller primary tubes help in the areas of low-end torque, but tend to > somewhat restrict high-end flow. The reverse is also true: larger tubes > aid in high-rpm/gas volume flow, but might hold back low-end torque. So in > the 2000-5000 rpm range, you might drop 5% with the large tubes. Above 5k, > larger tubes might give back 5-10%. Again, these numbers are just > speculation, as you would have to do a dyno test and get the charts. > >> From previous messages, we can see that this seems to be true of the GTS, > FZR's etc., where the GTS has smaller primary tubes and the other bikes the > large 34.5 mm tubes. My gut feeling is that going to a non-cat 34mm system > might yield another 10% power increase, assuming the computer can > compensate. EFI systems with an oxigen sensor can usually compensate for > intake/exhaust system changes up to about 20% of flow with no modifications. > > My preference as this point would be larger tubes. > > -----Original Message----- > From: Derek Baylor [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, July 10, 2002 6:32 PM > To: [EMAIL PROTECTED] > Subject: aftermarket exhausts > > > Here's a question for anyone in the know about fitting aftermarket exhausts > to the GTS. I'm interested in in completing my Renegade system by buying > the downpipes and collector (I already have their muffler). If I open up my > exhaust that much--by having removed the restrictive stock muffler and > ditching the cat. con. altogether--might I risk drastically changing the > power characteristics of my bike? I suspect I'll pick up some top-end > oompf, but will I sacrifice mid-range grunt, or risk making the choppy > throttle response even worse? Can the GTS injection system keep up, or will > I be running dangerously lean all time? Anyone out there have a full > aftermarket system and can speak to the changes, or at least have some > strong theoretical knowledge to share? Thanks. > > -Derek > > The information contained in this e-mail including any attachments may > constitute Corvis Corporation Proprietary Information that is subject to > Non-Disclosure Agreement and cannot be disclosed to any other party without > the express consent of Corvis Corporation. If you are neither the intended > recipient of this e-mail nor responsible for delivering this e-mail to the > intended recipient, note that any dissemination, distribution, copying, or > retention of this e-mail is prohibited. If you believe you have received > this e-mail in error, we request that you notify the sender by return e-mail > and then delete this e-mail and any return e-mail immediately. >
