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Mark Ortiz Chassis Newsletter

 
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Wiisass
Head suspension nerd


Joined: 09 Nov 2005
Posts: 131
Location: Philly

PostPosted: Thu Jan 19, 2006 10:16 pm    Post subject: Mark Ortiz Chassis Newsletter Reply with quote

http://knudstrup.org/~eknuds/chassis/

http://www.pds.i8.com/Ortiz/Ortiz.htm

Some good reading.


Update 10/7/06

Here's the full listing:
May 2000
Questions about a roundy-round camaro.

June 2000
Question about relative rear spring stiffness for roundy-round.

July 2000
Brake failure in late model pavement cars.
Polar moment of inertia.

August 2000
"The shock dyno lies!"

September 2000
Wheel Alignment and Caster

October 2000
Checking Rear Axles.
Torque arm or pull bar?

November 2000
Winter reading material.

December 2000
Springs, roll and cornering balance.
Shorty panhard bars versus long ones.

January 2001
Wind tunnel testing for short track cars.
Rear Caster.
Stacked coilover springs.

February 2001
Required frame stiffness.
Making ballast weights.

March 2001
Safety Issues - Hans device and soft walls.

April 2001
5th Coil location and rate.

May 2001
Chromemoly in stock cars.
Rear Stagger versus static cross.

June 2001
Weight transfer in winged over sprint cars.

July 2001
Chassis troubleshooting guide.

August 2001
Things that make spring changes work backwards.

September 2001
Stock car safety issues.
Tire Data.

October 2001
Balancing the car with camber and tire pressure.

November 2001
The big tracks and their big wrecks.
Selecting springs.

December 2001
Analyzing shock traces.

January 2002
Suspension Natural Frequencies.

February 2002
Winston Cup Harness Installation.
Things that make spring changes work backwards, revisited.
Some Basic shock questions.

March 2002
Racing front-drive cars.

April 2002
Quads on Pavement.

May 2002
Natural Frequencies revisited.
Spaceframe or monocoque?
Tire care.

June 2002
Oily tires.
Some basic oval track concepts for road racers.
Narrower rear track than front.

July 2002
Braking/downshifting technique.

August 2002
Steering geometry variables.
Importance of steering rack placement.
Bumpsteer as ackermann modification.
The old torque/horsepower controversy.

September 2002
Pantera front end revisited.
Horsepower and torque revisited.
Front and rear center of gravity.

October 2002
Move the rear wheels back to improve traction?

November 2002
Another Tire care tip.
Pull rods, push rods or both?
Trail and steering feel.
Kart scaling.

December 2002
Ackermann Recommendation.
Torque, RPM and power distribution in differentials.

January 2003
Tire warmers.
Spring placement on triangulated 4-link.
Roll center with a j-bar.

February 2003
Shock research update.
More on rear wheel placement and traction.

March 2003
Independent rear suspension for dirt?

April, May and June 2003
Shock and spring forces.

July 2003
Right rear spring stiffest?
Influence of pushrod angle on wheel rate.

July 2003 b
Chassis troubleshooting guide.

August 2003
Load transfer basics.

September, October 2003
Shock research update.

November 2003
Weight distribution and tire size.
Width versus drag.

December 2003
More on racing front-drive cars and load transfer.
Single or dual rear brakes for fsae?

January, February 2004
Reverse ackermann or toe-in on ovals.
Managing the behavior of the unbalanced.
Independent or beam front axle suspension for paved oval?

March 2004
Differentiating differentials.

April 2004
Effect of caliper mounting position.
More on weight distribution.
Spring splits with big bars.

May 2004
The new nascar tire.
Control arm angles in F1.
Arm angles in triangulated four-bar beam rear axle.

June 2004
More on F1 control arm angles.
Clutch use when downshifting.

July 2004
Setup for lower grip.
Lowering blocks on truck arms.
Ohlins high-frequency pistons.
Which shock to soften?

August 2004
Roll center migration, some more.

September, October, November 2004
Tire load sensitivity and weight transfer in trail braking.
Why are wide tires better?
Rear percentage versus yaw inertia.
Roll springing preload in monoshock setups.
Why so few rear monoshock setups?

December 2004
Roll center below ground.
Roll moments from longitudinal anti.

January, February 2005
Ideal spindle or steering geometry.

March, April 2005
Finer points of anti-roll bars on stock cars.

May, June 2005
Too much left percentage?

July, August 2005
Dynamics of three-wheelers.

September, October 2005
Load transfer question.

November, December, 2005
Optimizing engine-over-drive-wheels layout.

January 2006
Tires in the snow.

February 2006
Roll axis inclination.

March 2006
Diff differences.

April 2006
Springs, bars and load transfer.

May 2006
Rear percentage or polar moment?

June 2006
Effects of spring rates and damper settings during cornering.

July 2006
Beam axle pros and cons.

August 2006
Panhard bar longitudinal location.
Panhard bar jacking forces.

September 2006
Roll center in trailing arm front suspension.
More on roll axis and related analytical concepts.

October 2006
Twist beams and jointed de dion tubes.

Enjoy,
Tim
_________________
TIP Engineering
Just put the TIP in.
R&D, damper development and fabrication.

jrud@tipengr.com


Last edited by Wiisass on Mon Oct 09, 2006 5:36 pm; edited 2 times in total
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El Nagro



Joined: 22 Mar 2006
Posts: 10
Location: Lethbridge AB, CA

PostPosted: Sat Apr 01, 2006 10:37 pm    Post subject: Reply with quote

Cool, i read abit. Its alittle over my head Shocked lol, know of any good basic chassis tech articals that i could read??
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Wiisass
Head suspension nerd


Joined: 09 Nov 2005
Posts: 131
Location: Philly

PostPosted: Sun Apr 02, 2006 4:38 am    Post subject: Reply with quote

Have you seen the Physics of Racing Series? If not, it's another good read, a little more basic and covers some good stuff. I haven't read it in a while, but it should be worth taking a look at.

www.theoryinpracticeengineering.com/tech/racing.pdf

Tim
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TIP Engineering
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R&D, damper development and fabrication.

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tErbo b00st



Joined: 24 Mar 2006
Posts: 10

PostPosted: Wed Apr 26, 2006 5:01 pm    Post subject: Reply with quote

Wow this is a lot of information! Thanks! I've been really getting into techincal suspension and chassis tuning so this information is great!
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Wiisass
Head suspension nerd


Joined: 09 Nov 2005
Posts: 131
Location: Philly

PostPosted: Sat Apr 29, 2006 2:27 am    Post subject: Reply with quote

Yeah, there's a lot of info, but it's all good stuff if you have the patience to read through it all. It gets hard sometimes, but it's usually worth it. I have a lot more stuff that I need to upload, hopefully I'll get around to that soon.

Tim
_________________
TIP Engineering
Just put the TIP in.
R&D, damper development and fabrication.

jrud@tipengr.com
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Wiisass
Head suspension nerd


Joined: 09 Nov 2005
Posts: 131
Location: Philly

PostPosted: Fri Aug 04, 2006 7:19 pm    Post subject: Reply with quote

I just got the archives for 2005 up to now.

http://www.theoryinpracticeengineering.com/resources/ortiz_newsletter/

I haven't had a chance to read through all of them, but there's a lot of good stuff in there.
_________________
TIP Engineering
Just put the TIP in.
R&D, damper development and fabrication.

jrud@tipengr.com
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Wiisass
Head suspension nerd


Joined: 09 Nov 2005
Posts: 131
Location: Philly

PostPosted: Sat Oct 07, 2006 9:28 pm    Post subject: Reply with quote

I updated the hell out of this. I even wrote what each article had in it. So if you see anything interesting take a look.
_________________
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R&D, damper development and fabrication.

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