I would find it very useful if mass could be removed from a car in single player. Together with the options of engine restriction and positive ballast, this allows approximation of performance of many real world cars. The weight removal does not need to allow weight distribution changes, but if this is easy enough to program, then why not. Personally, I'd like to see enough adjustability so that you could cut the weight of the car in half.

This would be a SINGLE PLAYER ONLY feature, so enforcement of required weight would not be an issue for fair online play.

This is what you're probably looking for:
http://www.lfsforum.net/showthread.php?t=19691
http://www.lfsforum.net/showthread.php?t=19711
The way it works is finding and tweaking needles in LFS' memory haystack, which means that everytime LFS is updated, the needles need to be found all over again.
So for now, either play with this old version (put a copy of Patch V LFS.exe in your LFS folder, e.g. "LFS.V.exe" so you can keep the regular X version intact), or grab the tools and make your own patch X tweak..

The most likely next Tweak will be for the release version of S2, or the next one after that that's most likely not to get patched for a while.

No.

Quote from Cappy333 :

I would find it very useful if mass could be removed from a car in single player. Together with the options of engine restriction and positive ballast, this allows approximation of performance of many real world cars. The weight removal does not need to allow weight distribution changes, but if this is easy enough to program, then why not. Personally, I'd like to see enough adjustability so that you could cut the weight of the car in half.

This would be a SINGLE PLAYER ONLY feature, so enforcement of required weight would not be an issue for fair online play.

I'd like to see one homologation car - ONE - that weighs half as much as it's real world counterpart. There simply aren't any. The most weight that should be removed from a car is 15-20%, and even that's pushing it. Regardless, anyone whose used Mechanik or older Tweak knows that light cars do not fare well in this game as far as physics go.

Let's say you wanted to make an SCCA A-modified car:
Take BF1, use max downforce, restrict power, reduce weight (could be less than 600 lbs)

But you're right, most cars don't require that level of weight reduction.

Quote from Cappy333 :

Let's say you wanted to make an SCCA A-modified car:
Take BF1, use max downforce, restrict power, reduce weight (could be less than 600 lbs)

But you're right, most cars don't require that level of weight reduction.

What? You realize that F1 style cars are mostly stripped down as far as they'll get before you start removing body panels, which weigh nothing anyway. They're a frame with a suspension, drivetrain and seat bolted in, wrapped with about a pound of carbon fiber. There's NO way you can ever get a formula car down to 600 pounds. Well, maybe if you just remove the driveline and weigh it by itself.

And it's not that cars don't REQUIRE that level of weight reduction, it's just that it's IMPOSSIBLE to achieve that level of weight reduction. Get real.

Also, increasing downforce doesn't make the car lighter. It in essense makes it heavier. And restricting power does nothing to weight either, unless you make it more powerful and the car can make more downforce by going faster.

I think you're misunderstanding me. I'm not saying in real life you could strip down an F1 car to make it an A-mod. I'm saying in the game you can modify one car's parameters to get a good approximation of another's performance. So the F1 car with much less weight, and much less power would approximate an A-mod. The biggest difference would be the wheelbase and track dimensions of the F1 car are way too big, but these affect acceleration, top speed, and lateral acceleration to a smaller degree than power, aerodynamics, and weight.

Just use the FOX. Even that weights almost 1300 lbs with fuel and driver.

With a car like the FOX still weighing over half a ton, there's no way any type of A-modified car will weigh close to 600. That's superkart territory.

A-mods have smaller dimensions, engines, and the design is more competitive with no minimum weight requirement if I recall.

There are Formula SAE cars with suspensions and 600cc engines that weigh less than 400 lbs. These cars are almost as big as A-mods. I don't include driver weight.