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Slow acceleration
Posted:
Sat Mar 05, 2016 12:03 pmby PottoGadd
My car gets a top speed of around 250 but a slow acceleration of 0-100 in 7.5 seconds, and why does my car make a popping noise when it gears down, how do I fix this? It's 2015.
More info in the pictures:
http://imgur.com/a/5heVt
Re: Slow acceleration
Posted:
Sat Mar 05, 2016 12:08 pmby stickmaster62
PottoGadd wrote:My car gets a top speed of around 250 but a slow acceleration of 0-100 in 7.5 seconds, and why does my car make a popping noise when it gears down, how do I fix this? It's 2015.
The popping is simulating backfire from the exhaust as some high performance engines do backfire in real life. As far as acceleration, how heavy is your car?
Re: Slow acceleration
Posted:
Sat Mar 05, 2016 12:31 pmby PottoGadd
stickmaster62 wrote:PottoGadd wrote:My car gets a top speed of around 250 but a slow acceleration of 0-100 in 7.5 seconds, and why does my car make a popping noise when it gears down, how do I fix this? It's 2015.
The popping is simulating backfire from the exhaust as some high performance engines do backfire in real life. As far as acceleration, how heavy is your car?
My current one is at 1400 kg.
Re: Slow acceleration
Posted:
Sat Mar 05, 2016 12:32 pmby squidhead
Lean out the mixture a bit for less popping, you can afford it at this setup. Also we need to see your gearing, tires and car weight.
Re: Slow acceleration
Posted:
Sat Mar 05, 2016 7:42 pmby PottoGadd
squidhead wrote:Lean out the mixture a bit for less popping, you can afford it at this setup. Also we need to see your gearing, tires and car weight.
The gear spacing is set at 52 via a manual single clutch with 5 ratios, the tires are sports compound and both are 185 wide, a diameter of 595 and a rim diameter or 19, it weighs around 1400 kg .
Re: Slow acceleration
Posted:
Sat Mar 05, 2016 7:47 pmby strop
Those are some pretty darn narrow tyres for the car's weight. By comparison my 2013 city-runabout weighs 1330kg and has 205s. I recommend you use tyres at least 215-225 wide and see what happens. If you haven't already, flare out the wheel arches a bit.
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 12:04 amby PottoGadd
strop wrote:Those are some pretty darn narrow tyres for the car's weight. By comparison my 2013 city-runabout weighs 1330kg and has 205s. I recommend you use tyres at least 215-225 wide and see what happens. If you haven't already, flare out the wheel arches a bit.
I have a car with 315 wide tires and it still only gives 0-100 in 6 seconds, with rear wheel drive. Might there be something wrong with my engine? The engine makes 270 HP at 4200 RPM, and 477 newton meter at 2200 RPM.
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 12:18 amby squidhead
We're not seeing the wheel grip to power graph or the gearing graph.
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 12:48 amby strop
Is that 315 wide tyres for the wheels that are actually being driven?
No seriously, we don't know the drivetrain of the car, or the format, or the weight distribution. Also your engine has a very low redline so whenever you change up gears you're losing a lot of power. Check the acceleration graph on the drivetrain tab to find out whether it is the tyres or the engine that's limiting your acceleration.
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 2:18 amby PottoGadd
strop wrote:Is that 315 wide tyres for the wheels that are actually being driven?
No seriously, we don't know the drivetrain of the car, or the format, or the weight distribution. Also your engine has a very low redline so whenever you change up gears you're losing a lot of power. Check the acceleration graph on the drivetrain tab to find out whether it is the tyres or the engine that's limiting your acceleration.
My current one is RWD.
Pictures:
http://imgur.com/a/QDK10
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 2:25 amby strop
Ok, so that car gets from 0-100 in 3.8s, which is reasonable considering you've got up to 420hp and very wide rear tyres, and that one is an MR car. Again, your engine redline is cutting off early and depriving you of a decent powerband. Note how the acceleration is limited by the engine as soon as you hit 2nd gear.
Now, about the car that was taking nearly 8 seconds to get to 100 despite having an engine that should have been getting it there in under 6, do you have screenshots for that?
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 2:31 amby squidhead
I don't see a problem here. :\
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 2:37 amby PottoGadd
squidhead wrote:I don't see a problem here. :\
No, my new one based on the Ferrari Enzo is decent and only costs 88.000$ (100% profit), and that's only double the price of the new Renault here in Sweden which is priced at around 40,000$
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 2:40 amby strop
By the way, talking about something other than acceleration: MR cars generally don't like it when the front wheels are wider than the rear wheels. In fact if anything they should be considerably narrower. You've got too much friction on the front wheels and it's causing that oversteering behaviour which is very bad in an MR car. It's probably hampering your car's cornering.
Re: Slow acceleration
Posted:
Sun Mar 06, 2016 2:48 amby PottoGadd
strop wrote:By the way, talking about something other than acceleration: MR cars generally don't like it when the front wheels are wider than the rear wheels. In fact if anything they should be considerably narrower. You've got too much friction on the front wheels and it's causing that oversteering behaviour which is very bad in an MR car. It's probably hampering your car's cornering.
Okay, the car got a time of 1:17 on the Top Gear track I think, altough I'm not done with it yet.