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Wet Torque and Dry Torque are two different specifications. 180 NM WET will put substantially higher axial load on the threads than 180 DRY. If you aren't knowledgeable on this concept, you might...

How significant is 'significant' ??

We built a car with 4" / 7" RC F/R (not at the CG, but plenty above ground) so that we could run soft springs and no ARB because the competition at the time...

Funny, thats what just about EVERY NASCAR driver complains about ALL THE TIME. Especially when comparing the "Old Cars" to the "COT" (with it's life savingly strong center section)

Keep in mind that the section of rotor under the pad, the section just leaving the pad and the section of rotor just entering the pad will be different temperatures during braking. This might change...

Just remember, a K&C test is different because you have a constrained chassis. On the rig, jacking produces changes in wheel pad load. On the track, jacking produces a steady state change in...

Most NASCAR Cup cars ride around for most of the lap fully engaged into their virtually rigid bumpstops such that the RF completely loses "kinematic" behavior. The compliance slopes will actually...

This is one method. Some might disagree, but think through the process and decide for yourself.

(Assuming coil-over shocks)

1. Replace springs with solid members of length equal to design...

You are right to be skeptical!

All motion can be defined as a combination of translation and rotation about any point. We CHOOSE to do the math about a certain point (cg) because sometimes it is...

It's not a bad batch because they failed exactly where they should. Smallest cross sectional area closest to the center.

The spokes are not too thin for the loading case (once), they are too thin...

You mean that you cant tell just from looking at them that that is EXACTLY where they are supposed to fail? Lowest cross sectional area and stress concentration at the radius which usually has more...

Let's say that the roll center is sufficiently high that no CoG-RC couple exists and no kinematic roll deflection occurs during cornering, regardless of spring rate. (We could also just use a...

In FSAE its possible there are more 'few moments' that the high RC car is faster.

If the high RC car transfers weight faster, it might achieve steady state sooner (has a lower time constant). If...

A=V^2/R (lat g, velocity, radius). The goal of racing isnt to maximize A, its to maximize V. Yes you need to look at how track width affects A, but it is EQUALLY important too look at how track...

You need to add more equations to be able to solve. Think about the following:

Assume your upper A-Arm is parallel to earth ground plane with an ideal frictionless, inertia-less SLA pushrod...

Don't paint yourself into a box. Ride and Roll are two different modes, which means you can design for them independently if you are clever enough.

There are multiple ways to have a high roll...

who says the orientation of the rim is always parallel to the spindle axis under load?

With wimpy wheels, you could actually see MORE misalignment between the rotor and caliper under heavy...

With your 4-2-1 exhaust, try the following:

1. design your primaries for as short as possible, then build two sets of primaries that have an extra 12" of primary length.
2. Put one set on the...

Z,

[+1]. This thread contains one of the better explanations of jacking forces i've seen. If I knew how to put 5 gold stars next to this thread, I would.

Danny,



The proper training...

For a typical double a-arm configuration:

For a defined lower ball joint position, there is (hopefully) only one upper ball joint position that will satisfy the condition of 'the distance between...

If I have +300 lbs [lift] on my front axle and -300 lbs [downforce] on my rear axle, I have no total downforce, but I do have aerodynamic pitch moment. So where exactly is my CoP??? At what point...

In NASCAR, what's level at inspection height is not level at mid-corner attitude (lots of travel, lots of vertical loading).

When can we finally stop arguing 'power vs torque' or 'which really accelerates the vehicle'???

Torque [J] = Work [J] = Energy [J}

Power by definition is the time-derivative of Energy.

POWER...

Although many times the fastest way around those FSAE hairpins is actually done with aggressive braking, a very little bit of countersteer, a skillful use of the throttle, and complete disregard for...

While I agree that the ROI isn't there, don't let anyone over "Z"ealous convince you that it can't be done properly, because it can.

Wisconsin's DBW system in 2001&2002 completed both endurances...

Anyone looking at designing failure modes for ETC (or mechanical throttle for that matter) should look at the US Federal Safety Standards to which all US production vehicles must adhere.

49 cfr...