I have read many posts in the past where people would describe this same issue and the best solution that most people stick with is just using the “manual” setting. This happens on a lot of race cars, too. Street cars seem to be fine off the line though. This happens to me too. Do you have traction control on? Some have suggested turning it off to keep the car from bogging down off the line which seems to work for me at least. Then you just have to worry about not spinning out.
It’s a glitch. I think lowering the first gear can help, but just switching to just manual/without clutch is probably the best work around.
Unfortunately, it is still a glitch.
Can’t race with out t/c in Xclass because if i try to the car’s just do doughnut’s and i can’t even get round the first corner,so there is nothing that can be done then,i guess i can run with a clutch in rival’s as being slow away won’t matter on the first lap anyhow.Well ok guy’s thanx anyway’s…
This problem can be corrected by shortening first gear. I have found that this works on all of the race class cars I have used with one exception, the E23. With this car, I had to switch my assist to just the Manual setting.
I have not driven all the race cars. There may be a few that I am unaware of.
You won’t be any faster using clutch in X class anyway, or in any of the actual race cars in P or R either.
I’ve found that the best way to launch is to keep the clutch engaged until the countdown timer ends and then let go off it. Seems to stop the car from bogging down off the line but you can lose time through reaction speed and it does feel slower than in the lower class cars.
I do wonder if this was originally intentional by T10 to bring in an element of clutch control for launch to make it more challenging/realistic but the implementation might be a bit poor? I have no idea but that is how I try to compensate, either that or manual only.
I’m more inclined to think it was done intentionally to prevent AI from damaging their engines on the starting grid. As this is not a problem with the clutch, it’s a problem with the engine physics when the car is stationary the engine makes limited power. And the fact that engine damage only occurs in high power cars with lightweight flywheels, the same cars are the ones worst affected by the bug.
If that is the case would the AI not bog down on launch as well? Or could the timing be so quick that the computer can handle it easily but a user like you and I are just not going to be able to react fast enough. Even when I manage a launch I am still marginally slower than the AI.
AI don’t use manual w/clutch, the AI system uses all of the ingame assist, hence why you never see AI lock the brakes, oversteer or wheelspin.
Yeap, that’s true… but it also blows big time. Robs away from the challenge and realism factor.
As for the whole man/w clutch deal on the pad, I gave up on it long before FM5, even though I’ve tried it a few times in 5 and 6.
It just doesn’t work realistically - revs bounce, engine and trans get damaged… and the downshifting sound, that’s just soft and dull. Cars most certainly don’t sound like that when engine-braking at high speeds. Switch to regular manual and all sounds fine.
I simply lift my finger off the trigger when working with stick-shift manuals. For the immersion. 
Regardless of their difficulty setting? This sort of makes sense but I am imagining that at a certain difficulty setting the assists would be removed so that the AI can go faster. For the AI fastest will be without assists as the timing should technically be spot on perfect.
I had never experienced this issue until last night. I tried using the Porsche in Modern GP League, and it just stalled on starts. I checked my assists and found that I had TCS on, from an earlier experiment. I know that TCS can eliminate the wheel spin on the start, and certain cars really need to be tuned with much more acceleration to run TCS. But, even with TCS off, the car stalled on start. I haven’t had a chance to dig into the gearing and try to fix it yet, but I plan on looking at it this evening.
Peace
You should check out the Audi event as well. I can’t get that car to move off the line on start.
Neither could I. I finally just gave up.
The gear ratios of most cars are wrong. It seems that certain cars have a monstrous first gear, which stops them from taking off, unfortunately some of these cars are show case race cars meaning you cannot tune your gearing to be more appropriate.
It’s a bug with engine power, not first gear. A v8 supercar should be able to fry the tyres in second gear (as should many powerful race cars), but can only just hobble off the line. Bug is bug