I haven't had a chance to dig yet.
I'm going to mess with the "Tire Pressure and Camber" setup page tonight if I have time; I don't know what the hell a camber is but it might hold the key.
It displays adjustable settings for each tire.
This is the front:
Camber
-2.5 degrees (default)
Tire pressue
135 kPA
and this is the back:
-1.0 degrees (default)
170 kPA
Then it lists this next to each tire on the car diagram:
87 C
87 C
87 C
And, finally, it says "symetrical" at the bottom with a slider to change something. I'm going to run some practice laps and mess with the values.
I think it's pretty cool learning about this stuff. Games nowadays are mostly so shallow that they don't hold my interest very long. I needed something a little more in depth.
I haven't tried F1, but I've played other racing simulations, for a while pretty seriously, so my 2 cents.
You're probably slipping too much and overheating rear tires while not going fast enough on average to tax the front ones. You can try reducing oversteer (in other simulations there's no "oversteer/understeer setting, one usually adjusts real car parts, mainly suspension). Also, increasing downforce will give more grip, though only at higher speeds. Lowering tire pressures also provides more grip, but comes with more heating. If there's a setting for toe-in/toe-out you want to increase toe-in / decrease toe-out - results in more stability at the expense of turn-in capabilities.
So, about the best thing you can do to increase front tire temps assuming your driving is at least semi-decent: decrease tire pressure. In some other games, you can also select softer tire compounds.
Adjusting camber will help if your tires are heating up unevenly like the outer part more than the inner part, and will provide more grip in turns. When I say uneven, I'm talking about different parts of one tire here. When you're cornering, your tire will get angled, so to get optimal contact patch during cornering, you "pre-angle" it in the opposite direction (negative camber). Racing cars always use negative camber unless it's oval, in that case you want the inside two tires to have positive camber. In other simulations, I usually had to increase negative camber (i.e. make it more negative) from default settings.
Btw, while knowing this stuff is useful, and I've read lots of guides and docs, I've usually been tinkering to adapt other people's car setups to my preference, or for a different race course, never doing one from scratch or game's default sets. I'm pretty sure you should be able to find some decent setups online somewhere.