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Sorry about the delayed reply. The pressures that I ran were on new R25Bs. I have never unseated a bead, using Panasport or Keizer wheels. In the course of experimentation, I went down as low as 9.5...

My DB-6 has 3 IR tire temp sensors aimed at one front tire, and 3 on one rear tire. After considerable experimentation and analysis, I settled on 11.5 psi front / 13.5 psi rear on low-grip asphalt,...

The DB-6 basket case that I bought obviously was run for a whole weekend with no oil in it. So, I bought a new Staffs box, with an eye toward running both road races and autox. TRE then prepped it...

The simple solution is to prep the cockpit immediately after getting out, every time. Loop the sub straps over the steering column. Hook the lap belts over frame tubes or whatever will hold them up....

Rear "caster" is often the bump steer adjustment. With suspension alignment, everything depends on everything else. I recommend a full disassembly and reset, measuring everything along the way as...

That is evidence of either crash damage or imprecise assembly. I discovered a big wheelbase difference on my first FF, which led to a complete reassembly. The car handled a lot better after that.

http://www.go-annamarie.com/

I saw Annamarie spreak at a standing-room-only presentation at PRI last year. Her method was a real eye opener, completely logical, and clearly a full time job to...

Just don't ever get them wet. That kills the shine instantly.

Waxing is probably OK for vintage, but don't count on being able to dye penetrant inspect them afterward.

Let's not dwell on the fact that almost every anti-intrusion tube is much smaller and lighter than the wishbone tubes, or the fact that almost every one of them has an absurdly weak slip coupler...

The most effective development method is to make only one change, every single time the car comes to a stop. Like that, every run is a development iteration.

Unsecured ballast = bad idea.

A major factor is how often you plan on buying new tires. New R25s are good to go right off the trailer. As they get older, it takes more heat to wake them up.

Correct, but I'm always hoping to learn. Bump limiting makes good sense, especially for ground effect cars, and especially if it's done with a 3rd spring. Droop limiting only makes sense if the gain...

That person is clearly not me. There are a lot of threads that have drifted into this topic on ApexSpeed, but is there a really good one that covers why instead of how?

Especially with an open diff, the rear toe adjustment can be used to adjust the compromise between power oversteer and inside wheelspin. Rear toe in reduces the slip angle of the inside rear tire...

Hoosier R25B

When they are new, they are alive right off the trailer. As they get older, they have to get hotter before they come in. That is excellent training for road racers. The field...

My record is 5 cones stuck in/under the car.

The proportions, wheels, rear fender, and rear wheel well cutout shape look a lot like a Mk II Spitfire. However, the exhaust was on the right side of a Spit, so if it's Spit based it either has a...

Sorry for the OT tangent. Are there any track day outfits that allow mixed open and closed wheel?

The upper half of the tub was carbon, and the lower half was aluminum, per regulations through '91.

For '92, the regs were changed to allow the floor to be carbon, but some of the sides of the...

A good man, and a good friend. I'm shocked to learn that he is gone.

He was always the benchmark to compare yourself to, in every respect.

You could have Keizer make a set or two of custom wheels for you.

Here is the engine preparation manual that results in a complete dressed engine on a stand. There is another manual for each chassis kit, and another for the electrical system.

A question for those with multiple drivers: Are there any good ways to quickly change car numbers since we can't use magnetic numbers?

Here is Jeff Kiesel's method:

https://www.youtube.com/watch?v=PG2xsK8ji78&feature=youtu.be

Because Indy Lights cars were made only for an American racing series, and FIA has no real presence in America, I really doubt that they were certified to any FIA standards. If SCCA's intent is for...

3D Content Central for low resolution packaging.

TurboSquid is another source, with file formats and graphic detail meant for video games. Dimensional accuracy is not the primary goal for gaming...

Just look at it this way: You already have your mid-life crisis car.

Plus, there are many more things that you can do with a FF than most of us ever try. Car shows and drag racing come to mind...

I suspect that the biggest problem you will have is the noise limit at San Diego autocrosses. It's much lower than most places.

Several of the joints on the 016.a were designed to be structural...

We would like them to heat up. Unfortunately for us, water conducts heat really well, so the tire temperature will never get much hotter than the temperature of the water on the ground, no matter how...

A lot of people disconnect both anti-roll bars when it rains, but that is a dangerous way to soften the suspension. The front bar is almost always a lot stiffer than the rear, so disconnecting them...

A small fan on the radiator helps prevent overheating while the car is stationary, but it won't cool the engine. It will just maintain the temperature that it was turned on at. So, early and often....

I guess that there could be a remote chance that it might possibly be a very home-made ring & pinion setup jig, or perhaps a diff setup fixture. But it's probably a kaloozoid johackle.

Look through the links. One of them includes a photo of the dipstick and its seal.

http://www.apexspeed.com/forums/showpost.php?p=349194&postcount=5

To expand on that, here's my calibration technique. I started with no fuel in the cell and a full fuel jug sitting on a digital...

That's why I mark my fuel dipstick in pounds instead of gallons. It makes the math very simple. I target 4 lb over to allow for 1 lb per scale of calibration drift.

Engine braking acts like a handbrake. When the rods come out the side, even more so. Been there, done that.

Gzzzrk

More race reports, reposted from way back when the wheel2wheel email forum...

I recommend sending your carburetor to the pro FF engine builder of your choice for a rebuild and the various tweaks that are known to improve it for FF service. If that's not a problem or not an...

There is a ton of valuable direction on the manufacture of anti-roll bars in Carroll Smith's Engineer to Win. If you intend to make a race car part, please read all of that book first.

The key to understanding rear toe tuning is the friction circle. More rear toe in reduces the slip angle on the inside rear tire relative to the outside rear, so it has more of its longitudinal grip...

If your setup is really good now, you may notice it. Race cars are much more responsive to small adustments when the setup is "in the window". However, the spring change will be minor compared to the...

New tires will completely transform the car, so you probably won't notice a 7% rear spring rate change.

On a smooth surface, springs and bars are interchangeable for cornering-only performance....

I've seen an 87% gearbox efficiency claim for a Mk9. With that, 110 hp at the crankshaft produces 95.7 hp at the diff output flanges. On a chassis dyno, there are some additional power losses from...

One of my fundamental principles is:

Don't guess when you can know.

If you have an O2 sensor and a data logger, you can develop your jetting during a test day at the track. If not, go buy...

My definition of intelligence is learning from other people's mistakes. This video is excellent learning fuel.

What I do is use the "Insert New Lap" function to separate the run from the pre and post run data. However, guesswork is required to locate them correctly.

It is possible to use the Track Manager...

I got a glimpse of the future while driving a VW Polo. Instead of an ignition cut rev limiter, the Polo just rolled the drive-by-wire throttle closed at its redline. It was very smooth, and a nice...

Have you ever missed a shift?

It's probably both. The feedback that a FF gives the driver is immediate and crystal clear. Also, because a FF does exactly what you tell it to do right now, you have to become very careful with your...

As someone who has a lot of experience with unintentional off road racing, I can help clarify what happened to TeamFRD.

The car sure looked like it whipped around without warning, but the narrow...