Algodoo

Welcome back, Andriyan!

Seems like this engine is putting out about 165 hp @ 440 rpm, and about 3800 nm of torque. But I noticed this engine also weighs about 750 kg, and the first two flywheels rotate in the opposite direction of the second two, which causes a lot of inefficiency because the gears slip and a lot of power is lost. Why've you done this?

If you shift way before the green light is turned on you get even better timing (9.08 in my case)
And on a side note your "mind" is horribly scripted. You should use as little scene.my.variables as you can, so hear me out:

You can make this with only 3 or 4 variables instead of... 36

First for the gear selection you use a variable called scene.my.gear. You write to this variable the number of the gear, like:

(e)=>{
keys.isDown("n")? {scene.my.gear = 0}:{}
keys.isDown("1")? {scene.my.gear = 1}:{};
keys.isDown("2")? {scene.my.gear = 2}:{};
}

and on and on. You should write the script on one box, in the postStep part.

For the indicator you can do this instead of using a different variable. Write it in the text part:

text = {scene.my.gear < 1? {scene.my.gear < 0? "R" : "N" }:{"" + scene.my.gear}}

Now for the gearbox you might want to use the radius changing type. Now that you have scene.my.gear with the number values you can make a circle and write a script like this one on its radius property:

radius = {scene.my.gear == 0 ? {0.01}:{scene.my.gear / 250 + 0.05}}

That script explains itself pretty well. For the other gear:

radius = {scene.my.gear == 0 ? {0.1}:{0.15 - scene.my.gear / 250}}

You have to play with the values to make it work like you want it to. You can also try scene.my.gear ^2 + 0.05 for example, if you want to have shorter low gears and longer high gears
In this case you wouldn't have a reverse gear but I find it useless for a dragster. if you want a reverse gear, let's say it will be scene.my.gear -1:

radius = {scene.my.gear < 1 ? {0.01}:{scene.my.gear / 250 + 0.05}}
radius = {scene.my.gear < 1 ? {0.1}:{0.15 - scene.my.gear / 250}}

And you have to add a third circle between the two gears with this script on the collideSet part:

collideSet = {scene.my.gear == -1 ? 4 : 0}
Or whatever collision layer you use for the gearbox. 4 is collision layer C, 8 is D, 16 is E, and so on. Be careful when writing it, you have to leave spaces between the = and the -1 or your script will be changed by algodoo and it will not work

But I like your car I hope you put this wall of text to good use. If you ever make a bigger scene it will be a lot easier and faster to script this way. Always remember the if statement, so that you don't end up using 36 variables but 3 or 4. And the keys.isDown("key") is a good replacement for lasers and boxes, a lot more tidy

@pnvv pnvv because if the fly wheels run in the same direction , the car started to move arround before I put on the gears, it cant stay still when you rev ing

and I confuse how to deal with that so.. I made my engine that way ..

@The Linkage The Linkage , Wow ! Thanks alot

@faytree , Thanks , I've been really busy studying for my final 10 grade exam

@pnvv , pnvv actually I can make that engine powerfull by increasing the spanning circles weights and radius but the car starts to fly arround , I really confuse, and I maybe have found a solution for the gearslip by replacing it with hinge with reverse rotation bug killnich share , i dont know.. just trying

nope really bad idea .. and I'm just spamming my page with my own comments

The car fly around when you increase the dens of the spawning because your car has no weight... You can make it faster when you take the weight away from your flywheels and increase your interiamultipler on it.

Your car is extremely light, only 120 kg whilst the engine is the other 1200kg of the weight. It's a good car and scene though!

Also, make sure the camera that follows the car is in the center of it, like the guy's head. Making it focus on the rear or front makes it look horrible.