Race Winner - Todd Ulery's DTM Opel Calibra

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Presented by Marco Carvalho and Todd Ulery
Filmed at Electric Dreams in El Segundo, CA
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[@AquariumDesignGroup]

Exquisite build as always, Todd.

[@toddulery]

Gearing was 9/23. When we race these on the wood track next month I will likely swap to a 10T pinion.
On the modular crown, I ran 4 shims with 2 on each side of the motor shaft. The gear didn't have much time on it prior to the race. Typically, the modular crowns will start with a 2+2 setup, and then after the gear initially breaks in, one shim will get moved from the gear side to the collar side. This will tighten the mesh back up. Just looking at the car to answer this question, I moved a shim over and it is now 1+3 shims.

[@TomDolan-oq6cw]

Why is that much body movement necessary? How does it actually improve the handling of the car?

[@toddulery]

Short answer: it helps to isolate the body roll from the chassis roll.
A little more detail: this decouples the moment of inertia of the body and the chassis, until the point when the head of the body screw contacts the top of the body post. It's important to note that, for this to work properly, the body needs to be resting on the outer edge of the chassis and not on the body posts. If a particular car has a body that rests on the body posts, and not on the edges of the chassis, then I don't think running the body loose helps at all, and probably makes the car worse.
To help visualize the body's interaction with the chassis, take the body off of a car and put the chassis on the track. Now, try to make the chassis lift by lifting on the body post and pushing on the outside edge of the chassis. Pretty easy, right? Now try it again, but only pushing on the edge of the chassis. Much harder. By running the body loose, you're limiting its forces on the chassis to the latter scenario.

[@nflpicks4920]

Congratulations Sir
Two questions first who made your decals?
Second im trying to understand the front tire height are the tires touching the track or they 1 millimeter off the track? Thanks in advance

[@idwurks]

Todd designs all his own decals on the computer, and makes them into masks. So usually all the cars are “all paint.” The tires will touch the track on all four corners 😊

[@nflpicks4920]

@@idwurks man I have been trying to make them I find it difficult to do!! If he could share that would go miles beyond appreciation 😆and I will do a test and tune I may have the height to high , thanks again

[@toddulery]

@@nflpicks4920 This car is all done with an airbrush and masking. I have a Silhouette Portrait 3 that I use to cut the masking. The masking vinyl that I use is Artool Ultra. If you're using water-based paint then Oramask 810 works equally well and is much cheaper.
Re: Front tire height. Since this race was on plastic track, the car was setup with the tires just off the block (on a flat/zero recess block). Only about 0.010" off the block. On wood track, I would have the front tires touching the block.

[@nflpicks4920]

@@toddulery Understand we primarily race on plastic tracks so I will see how it handles I’m coming over from HO so it’s a learning curve especially in the turns