Gearjammer
not too shabby, imagine 3 of those in eyefinity setup 
If you are using the correctly calculated FOV with both setups then things should appear the exact same size, you'd just be seeing less total stuff on the smaller monitor, but the size of the things of what you do see should be exactly the same size between the two monitor setups.Even with calculated FOV which is 30 degrees, everything is way too small. I did full one hour race to see if I can get used to it but no.
I'd choose the faster monitor setup for this point alone.Great response time, easier to save the car. In fact, I was good 0.5sec faster than with projector with less effort.
That's what I thought too but no it's never the same. The 3D world displayed on 2D screen is never truly realistic and from certain screen size everything looks a bit bigger. Calculated FOV with projector was 48, 30 for monitor, still everything looked much bigger with prj at 48. Actually the cockpit looks unrealistically big with prj, my g25 looked a bit small in the cockpit, however distant object appeared more realistic. I had to use crazy FOV like 60-70deg with prj for the cockpit to look realistically big but then all elevation and corners appeared flattened, obviously too high value.If you are using the correctly calculated FOV with both setups then things should appear the exact same size, you'd just be seeing less total stuff on the smaller monitor, but the size of the things of what you do see should be exactly the same size between the two monitor setups.
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Then I'm pretty sure something was miscalculated because the "perfect" FOV is supposed to give you the same 1:1 lifesize image regrdless of your screen size.That's what I thought too but no it's never the same. The 3D world displayed on 2D screen is never truly realistic and from certain screen size everything looks a bit bigger. Calculated FOV with projector was 48, 30 for monitor, still everything looked much bigger with prj at 48. Actually the cockpit looks unrealistically big with prj, my g25 looked a bit small in the cockpit, however distant object appeared more realistic. I had to use crazy FOV like 60-70deg with prj for the cockpit to look realistically big but then all elevation and corners appeared flattened, obviously too high value.
I believe there is no set/ideal distance from your eyes to the monitor as the monitor and video game you are playing is not acting as a windshield, it is acting as the eye of the in-game driver. The game essentially outputs an image to your screen, and that image is spawning from the eyes of the in-game driver (or at least it should, some people butcher the in-game camera/point because they think their real-life seating position should somehow allow their in-game camera view to change, and therefore they see an image on the screen from an incorrect perspective). Therefore I would think that the closer you can get to your monitor (without feeling uncomfortable / hurting yourself of courseand set it at roughly the same distance away from the eyes.