BJS racing
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- Jan 25, 2008
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On Sat. November 22nd at Painless Performance. We will be offering a tour of our facility in the begining of the day and then will start with the class. Painless will also be providing lunch for this seminar. Come and learn about chassis set up and have a good meal on Painless. You can contact Jason Hamner by email jhamner@painlessperformance.com or you can contact Dave directly at the info below. Here is a new outline for the class. Please notice that there has been many changes to the class material.
Ask Yourself These Questions to Determine if YOU Need This Seminar ...
* Do you know how much weight transfer you are getting?
* Do you know how much load you are getting in your rear suspension?
* Can you predetermine your G-Force at the launch?
* Where are the most common areas of chassis flex?
* How can inspecting the tin work help you locate flex?
* What is frame rail shift? Which frame rail goes where?
* How can you locate frame rail shift??
* What does caster offset do?
* What is the advantage of storing energy in a suspension spring?
* How can you store energy in a suspension spring?
* How can you tell if the shocks are valved too light for a car?
* How can you tell if the shocks are valved too stiff?
* What does adjusting the shock extension rate do to a suspension?
* What does adjusting the shock compression rate do to a suspension?
* How do you install and set-up a ladder bar suspension?
* How do you install and set-up a four-link suspension?
* How do you tune with shocks?
0A* What is the Rear Roll Center and how does it differ with the various locating devices?
* Which locating device is best for your car?
* What effect does your Center of Gravity (CG) location have on your rear suspension?
* What is the actual difference between a ladder bar and four-link suspension?
* How do you determine the CG location in a car?
* What is a linear shock curve?
* What is a digressive shock curve?
* How can you determine if your problems are related to the frequency of the suspension springs?
NEW COURSE OUTLINE:
The goa l of this course is to teach drag racers how to balance their suspension combination. Some racers don't know if they are hitting the slicks too hard or not hard enough. At this seminar, they will learn how to find this out.
I. WEIGHT TRANSFER
A. Drive wheel torque
B. Wheel thrust
C. G-force
D. Determine the amount of weight transfer
II. Center of Gravity
A. What it is
B. How to locate it
C. Polar Moment of Inertia
D. Roll centers
III. A brief look at chassis flex
A. Frame rail shift
B. Chassis twist
C. Rear Housing flex
IV. A brief look at bind
A. Rod ends
B. Ball joints
C. Mechanical issues
V. Shocks and Springs
A. Storing energy in the springs
1. Advantages of a light spring
B. Sprung/Un-sprung weight
1. Catalogs and the mistakes in them
C. Leverage ratios
1. Motion ratios
D. Calculating spring rates
E. Shock absorber mechanics
1. Twin tube
2. Mono-tube
F. Reading a shock graph (force/displacement and force/speed)
V. Front suspension
A. Caster
1. What it is and what it does
2. What offsets do
3. Steering Axis Inclination
4. Caster chatter
B. Camber
1. What it is and what it does
2. What offsets do
3. Mapping camber change
C. Toe
1. Front end alignment versus four wheel alignment
2. Thrust angle
3. Dog tracking- advantages and disadvantages
D. Travel limiters
E. Bumpsteer
1. How to detect it
2. How to fix it
F. Ackerman Effect
1. Is it good or bad?
2. How can we adjust it?
VI. Rear suspension
A. Leaf springs
1. Locator
a. Instant center
b. Wheel hop and pinion angle
2. Spring function
a. Housing floaters
b. Weight jacking
B. Ladder bars
1. Swing arms
2. Pinion angle
3. Ladder bar length
4. Hardware
5. Tuning with a ladder bar
C. Fourlinks
1. Tubular Fourlinks
a. Equal-length and unequal length
b. Instant centers and maps
c. Roll steer
2. Factory fourlinks
a. Equal-length and unequal length
b. Instant centers and maps
c. Roll steer
3. Tuning with a fourlink
D. Lateral locating devices
1. Panhard bar
2. Wishbone
3. Diagonal link
To Register ...
Call Dave Morgan at (567) 242-9779 or e-mail him at staaytuned@aol.com. The price is $85/person and includes the workbook. There will be a one-hour lunch break (not included in the tuition) and short breaks will be taken every hour. The seminar will run from 9am to 6pm.
Visa, Master Card and American Express accepted.
Ask Yourself These Questions to Determine if YOU Need This Seminar ...
* Do you know how much weight transfer you are getting?
* Do you know how much load you are getting in your rear suspension?
* Can you predetermine your G-Force at the launch?
* Where are the most common areas of chassis flex?
* How can inspecting the tin work help you locate flex?
* What is frame rail shift? Which frame rail goes where?
* How can you locate frame rail shift??
* What does caster offset do?
* What is the advantage of storing energy in a suspension spring?
* How can you store energy in a suspension spring?
* How can you tell if the shocks are valved too light for a car?
* How can you tell if the shocks are valved too stiff?
* What does adjusting the shock extension rate do to a suspension?
* What does adjusting the shock compression rate do to a suspension?
* How do you install and set-up a ladder bar suspension?
* How do you install and set-up a four-link suspension?
* How do you tune with shocks?
0A* What is the Rear Roll Center and how does it differ with the various locating devices?
* Which locating device is best for your car?
* What effect does your Center of Gravity (CG) location have on your rear suspension?
* What is the actual difference between a ladder bar and four-link suspension?
* How do you determine the CG location in a car?
* What is a linear shock curve?
* What is a digressive shock curve?
* How can you determine if your problems are related to the frequency of the suspension springs?
NEW COURSE OUTLINE:
The goa l of this course is to teach drag racers how to balance their suspension combination. Some racers don't know if they are hitting the slicks too hard or not hard enough. At this seminar, they will learn how to find this out.
I. WEIGHT TRANSFER
A. Drive wheel torque
B. Wheel thrust
C. G-force
D. Determine the amount of weight transfer
II. Center of Gravity
A. What it is
B. How to locate it
C. Polar Moment of Inertia
D. Roll centers
III. A brief look at chassis flex
A. Frame rail shift
B. Chassis twist
C. Rear Housing flex
IV. A brief look at bind
A. Rod ends
B. Ball joints
C. Mechanical issues
V. Shocks and Springs
A. Storing energy in the springs
1. Advantages of a light spring
B. Sprung/Un-sprung weight
1. Catalogs and the mistakes in them
C. Leverage ratios
1. Motion ratios
D. Calculating spring rates
E. Shock absorber mechanics
1. Twin tube
2. Mono-tube
F. Reading a shock graph (force/displacement and force/speed)
V. Front suspension
A. Caster
1. What it is and what it does
2. What offsets do
3. Steering Axis Inclination
4. Caster chatter
B. Camber
1. What it is and what it does
2. What offsets do
3. Mapping camber change
C. Toe
1. Front end alignment versus four wheel alignment
2. Thrust angle
3. Dog tracking- advantages and disadvantages
D. Travel limiters
E. Bumpsteer
1. How to detect it
2. How to fix it
F. Ackerman Effect
1. Is it good or bad?
2. How can we adjust it?
VI. Rear suspension
A. Leaf springs
1. Locator
a. Instant center
b. Wheel hop and pinion angle
2. Spring function
a. Housing floaters
b. Weight jacking
B. Ladder bars
1. Swing arms
2. Pinion angle
3. Ladder bar length
4. Hardware
5. Tuning with a ladder bar
C. Fourlinks
1. Tubular Fourlinks
a. Equal-length and unequal length
b. Instant centers and maps
c. Roll steer
2. Factory fourlinks
a. Equal-length and unequal length
b. Instant centers and maps
c. Roll steer
3. Tuning with a fourlink
D. Lateral locating devices
1. Panhard bar
2. Wishbone
3. Diagonal link
To Register ...
Call Dave Morgan at (567) 242-9779 or e-mail him at staaytuned@aol.com. The price is $85/person and includes the workbook. There will be a one-hour lunch break (not included in the tuition) and short breaks will be taken every hour. The seminar will run from 9am to 6pm.
Visa, Master Card and American Express accepted.