D&D vs RPw Dyno Comparison - Victory Forums - Victory Motorcycle Forum
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 2 (permalink) Old 08-20-2015, 03:08 PM Thread Starter
Senior Member
Rajder's Avatar
Join Date: Aug 2011
Location: Tulsa, OK
Posts: 329
Default D&D vs RPw Dyno Comparison

My dad recently bought a XC Tour with all of the Lloydz performance goodies and I have an regular XC with all the Lloydz performance goodies as well. Performance parts speaking they are nearly identical bikes. Both have the VM1 Cams, High Flow Air Filter and Adjustable Timing Wheel. The only difference between the two bikes is that my XC has RPW slip on mufflers and his XC Tour has D&D Boss slip on mufflers.

Two days ago I took both bikes to be dyno tuned by a small shop that the local Victory shop says is the best for Victory motorcycles. This shop uses a Dynostar Dyno out of the Netherlands. It is supposed to be a very good dyno but it is a Eddy Brake Dyno rather than a inertial dyno like a DynoJet Dyno. So you really can't compare power figures from this Dyno to most other dyno's (the torque numbers are much higher than shown on a Dynojet Dyno). But these bikes are nearly identical and were dyno tuned by the same guy on the same day.

It's interesting that both bikes basically have identical max power figures, about 107 HP & 128 ft-lbs. But, from about 3200 rpm to 5300 rpm the D&D mufflers have a distinct advantage over the RPW mufflers. There looks to be about a 8 HP & 8 ft-lbs difference at 4300 rpm. The power curves are basically identical except the RPW's fall off at 3200 rpm and don't catch back up until 5300 rpm.

8 HP & 8 ft-lbs of torque is a pretty big difference. I guess there is a reason why most of the Victory performance guys recommend the D&D mufflers. I'm not changing my RPW mufflers any time soon, the D&D's are just too quiet for me. But it is interesting that the D&D's perform so much better.

I just thought that I would share since I found it interesting.
Attached Images
File Type: jpg AJ XC Dyno.jpg (26.9 KB, 11 views)
File Type: jpg Dads XC Dyno.jpg (26.4 KB, 6 views)
File Type: jpg Dyno Graph Overlays.jpg (16.0 KB, 3 views)

2011 Cross Country
-Cee Baileys Windshield & Lowers. Victory Lower Bag Rails, Driver And Passenger Backrests.
-RPW Exhaust, Lloydz Air Filter, VM1 Cams, ATS (Timing Wheel), 1/4 turn throttle & IAV. PCV with Custom Tune by Coweta Customs.

105.2 HP & 127 Ft-Lbs on a Dynostar (Eddy Current) Dyno.
Rajder is offline  
Sponsored Links
post #2 of 2 (permalink) Old 08-20-2015, 03:18 PM
Senior Member
PaiN's Avatar
Join Date: May 2014
Location: CT, USA
Posts: 4,046

The D&D curves look very similar to what "us" Miller muffler users get....

PaiN's Rides on YouTube

"Living life is a great idea, but riding a motorcycle actually gives you a tool to do it..." -me
2013 Sunset Red Cross Country
Vic Tri-Oval Mufflers, Lloydz VM1-DR cams, AF, PC-V @112hp/113tq
Corbin Dual Tour seat, Klock Werks Klip Hanger bars, Vicwapz
Avon Contour grips, Kuryakyn Kinetic boards and rear SwingWings
Victory black LED headlight and Touring Pack, Madstad 9" windshield
PaiN is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Victory Forums - Victory Motorcycle Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
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