Research & Development

David Rash—A.K.A. “The Pope of Pipe”— has run D&D Exhaust based on one simple rule: “if it don’t perform...we won’t sell it.” That axiom makes all the difference between D&D and other exhaust pipe companies, and is the reason that our Research and Development department has been the very heart of the company for over 40 years. We don’t just build exhaust pipes that look great, we build exhaust pipes that really perform.

In our R&D department, we start by using the industry's first precision exhaust header modeling system, exhaust system CAD software and virtual dyno programs to virtually "build" prototype exhaust system designs. Then we put all of the theories to test on what we call the “lie detector”—the superflow Dyno. After it passes the lie detector test, we actually build it! But it ain't over, yet: we test each pipe design rigorously on motorcycles to ensure flawless performance, using a state-of-the-art super flow Eddy Current Dyno, laboratory-grade exhaust gas analyzers, exhaust temperature sensors, and sound metering devices that allow us to graph and analyze critical aspects, giving us the ability to fine tune each design to perfection.

There are no dyno games here...all testing is done in a controlled environment, and are performed with exact measurements on shock compression, air pressure, oil temperature and head temperature. So you can be sure when you see horsepower and torque numbers they are true SAE numbers!

No hype, just killer pipes!


LATEST R&D NEWS!


In the Works
New Bobcat System for the 2014 Sportster
Calling All Bagger Enthusiasts!
New Stubby Cat System
New Yamaha Bolt Features

Stay tuned for future developments as we progress on these exciting projects!

 
A RANT ON DYNO NUMBERS

From time to time, we will be posting dyno charts for comparison on various machines.

A dynomometer is a tool, and like any tool it is only as good as the person who is using it. All dynomometers—no matter the brand—measure torque, calculate numbers and graph those numbers based on a correction factor composed of calculations derived from atmospheric conditions at the time of testing.That means that if a bike is tested in January and again in July, the numbers SHOULD be the same: the dyno will correct for changes in the atmospheric conditions.

What a dynomometer CANNOT calculate is for operator error—or a shady dyno operator. Chassis dynomometers can be manipulated with very little effort. But there are NO DYNO GAMES here at D&D...all testing is done in a controlled environment, and are performed with exact measurements on shock compression, air pressure, oil temperature and head temperature. We use the best tools money can buy which are serviced and calibrated regularly so you can be sure when you see horsepower and torque numbers they are true SAE numbers!

Just remember: while having all the final number is great for barstool racing, what really matters is the percentage of gain. If we show a 10% gain, YOU will see a 10% gain. That’s what we’re about!

 

 


Stay tunes for future developments as we progress on these exciting projects.