About the Dri-Bar Cockpit-Adjustable Anti-Roll System

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"Technology Simplified" Mission We want the Dri-Bar be the leader in cockpit-adjustable, variable-rate roll bar systems. Products The Dri-Bar - manufactured by Drinan Racing Products (Danny Drinan) is a cockpit adjustable anti-roll bar system. The Dri-Bar is currently available for sprint cars (winged and non-winged), midgets (winged and non-winged), dirt late models, 600 cc and 270 ccmicro-sprints, as well as other custom applications.

How Dri-Bar Can Improve Your Performance

When trying to decide if the Dri-Bar system can help your racing program, you must first look at a couple of areas:

1. With the traditional system, the right-rear torsion bar is required to do two jobs:

• Support the car from going down
• Keep the car from rolling.

If it’s stiff enough to do both jobs, it’s stiffer than it needs to be to hold the car “up,” and in doing that it hurts forward drive and reduces your lap times.

2. The last thing you ever want to do is let the car “unload” the left-rear tire and reduce its ability to drive the car forward.  But when running a car without the benefit of the Dri-Bar, as the track dries out, you would typically reduce the left-rear rebound to reach the amount of side bite you want with the right-rear tire. When you do that, you allow the car to unload the left-rear tire and hurt your drive off of the corner.

Everything you adjust should be an attempt to achieve what you might call a “balance” – the amount of weight on each tire to drive the car forward.

When you have too much weight on the right-rear tire, it wants to go past the left rear, and the car gets loose. When you have too much weight on the left-rear tire it wants to pass the right-rear tire, so the car will be "tight" or "push."

Benefits of the Dri-Bar

1. The first benefit of using the Dri-Bar comes on corner entry. With its ability to “resist roll” it allows you to be more aggressive on corner entry, while keeping the car flatter and reducing the chances of getting up on two wheels or as we would say being “tippy.”
    
   As a racetrack dries out, you will need the left-rear tire to do more work. But, to do that, it needs weight on it.  
    
   Here’s where the Dri-Bar does its second job. When the car tries to transfer weight from the left to the right as it goes around a corner, the rate of the Dri-Bar RESISTS that transfer.  By resisting the transfer, when you are ready to exit the corner, you have kept more weight on the left-rear tire, thus allowing it to drive that much harder.
    
2. The next benefit is a simple function of how the Dri-Bar helps by unwinding. When you enter the corner and the car rolls to the right it winds the Dri-Bar up in the process. Once you have reached the apex of the corner the Dri-Bar begins to “UN-WIND” and puts the car back onto the LR to drive OFF the corner much harder. There is NO other part or suspension component that provides this benefit.
    
3. A major benefit of the Dri-Bar comes in the form of a cockpit adjuster which is allowed by most sanctioning bodies. With the Dri-Bar adjuster, you can make an in-cockpit adjustment during the race that is similar to that of a .025 right-rear torsion bar change at the simple flick of your wrist.

If you happen to have a sanctioning body that doesn’t allow the cockpit adjuster, simply mount the unit at the rear of the car and allow the mechanic to make a last-minute adjustment before you push off or during an open red-flag situation.

We suggest you start the evening with the adjuster handle in the center position. When you add fuel for the feature, you should pull the handle back to stiffen the rate for the added load.  
 
As the track dries out and fuel is burned off, you can move the handle forward and keep the balance much better for your car than simply adjusting the shock.  Remember, if you reduce rebound, you unload the left-rear tire and lose left-rear drive.
 
I have put these thoughts and procedures together in an attempt to help you with the use of the Dri-Bar and would gladly answer any and all of your questions. Please feel free to e-mail or phone me with your needs.

About Drinan Industries

Company Overview
Drinan Racing Products has been in business for over 20 years. It provides best-in-class, cutting-edge auto racing products and services. Founded by Danny Drinan, the company focuses on projects that are not typically easily accomplished by the competition.

Awards/Records for Danny Drinan/Drinan Industries:

• 2010: Hoosier Auto Racing Fans (HARF) "Mechanical Achievement Award" winner.
• 2009: Won the North American Non-Winged National Sprint Car Poll “Builder/Manufacturer of the Year Award,” voted on by key racing journalists from all over North America.
• 1999: Hoosier Auto Racing Fans (HARF) "Mechanical Achievement Award" winner.
• 1995: Set new track record at IRP in May; set new track record at IRP in April; set new track record at Winchester Speedway in April; set new race record at “Copper World Classic” in February; Qualified for IRP’s “Race of Champions” for the fourth year in a row; closed-course 24-hour world record for Subaru in the Forester (with Tyce Carlson and Johnny Parsons Jr.) at the Indianapolis Motor Speedway.
• 1994: Set new track record at “Copper World Classic.”
• 1993: USAC “Jimmy Caruthers Memorial” award recipient; set new track qualifying record at IRP in June; set new 10-lap track record at Milwaukee Mile; set new 10-lap track record at Bloomington Speedway; set new track qualifying record twice out of five races run in Florida for the All-American Midget Series.
• 1992: USAC’s “Most Improved Driver” award recipient; Won race and broke track race record by six
  seconds at IRP in May; set new track qualifying record at IRP; first year of competing with the original
  Dri-Bar on race car.
• 1991: Set new track qualifying record at Salem Speedway in an All-American midget series race.