I can also add some precision for the inputs. I don't see any problems with increasing it to three decimal places. Thanks for your patience in the meantime
I'm grateful your putting in the effort. This will be a good help for our builders, we can share our ideas more easily. I think many builders land up putting a lot of hours into this and I hope this will help us publish some standard setups. It's not a full package, but it's a big step up from drawing or string computers.
My thought is that a track car works better on the street then the other way around.
You always get in trouble when you generalize and you should never put a luggage rack over the fan on top of a Porsche 917. In the context of the cars we build here it is a sensible statement. If you look at Car9 and want to get a sports car for street use, say picnics, weekend rides to car meets or average daily use - you can make a couple simple changes like raise it 2" and skip the roll bar braces going by the driver's head. It wouldn't have any downsides compared to a Seven or Locost or your average motorcycle.
Since the Locost was not designed for the track to start, it has a less robust frame with less protection for the driver. That's not so easy to fix once you built the car and want to track it. The builder is somewhat more on their own when it comes to suspension , especially IRS. Car9 is designed for IRS, but the design is just as suitable for a live rear axle because it does not depend on a suspension box in the rear.
To best support the builders and drivers I am trying to provide a very adjustable suspension for Car9 with data on different setups. The wishbones are attached with bolt on tear tabs. Replacing the tabs with a different shape or just flipping them upside down can adjust roll centers, adjust anti-dive and anti-squat / anti-lift and help with ride height etc. When we have data and people know what they want, builders can just weld the tabs on for street cars.
Vsusp looks like a good way to explore this stuff and to demo ideas or dimensions for setups in threads here on LocostUSA and on the Car9 website. People will be able to click on links and see suspensions with parts from Miatas, Subarus, Fords and contribute their own ideas.
An example of something I'd like to explore and make easier to look at is the effect of drop pins on spindles. Production car spindles, front and rear, seem to suffer from having the lower wishbone too high off the ground for us. I think that can effect the choices or tradeoffs between Roll Center heights and camber control. I don't really know yet though. How much better will the numbers look with a drop spindle?
We can design some simple spindles that use bolt on hubs, how much better would they be? Vsusp can be a quick way to look at some of this stuff. It turns out Car9 is especially easy to do here because my wishbones have one leg perpendicular to the chassis, no extra math involved to work in 2D.