Sury reds are just plain bad it doesn’t matter what red, if you want to see what I mean take a photo of a bright clean red like Coca-Cola red or QANTAS red something like those will do, or a post office or fire engine red even a bright red rose is good then print it out.
Once printed go put that print next too or on the original subject, you will get a shock at how bad it really is, it might look initially on screen that it’s ok but trust me it’s not its mud.
Don’t take a red car that is metallic, iridescent, pearl or candy, those won’t reproduce accurately in any photographic system no matter what you do, so just try plain reds, those should at least be within the possibility of it one would think.
If you try to brighten the red up yourself you will find as I did the system doesn’t have the scope to do it, you will either get an orange effect or a pink effect in the red but you won’t get a bright clean red, try it and you will see what I mean.
Greg