Coasting?

[Ben_G]

So I've noticed that my BRZ seems to need a lot of throttle just to keep going at a constant speed. Even if I'm in 6th and let off the gas, it seems to lose speed super fast.

I've been driving FWD cars for a long time now and they seem to not need as much throttle to maintain speed. My last RWD car was a long time ago (a 240SX) and I don't remember if it was like this too.

I know RWD suffers from increased frictional losses and stuff over FWD, but does anyone else here get the feeling that you need a heavy foot just to keep moving?

[industrial]

Most normal cars have heavy ass flywheels, rotating assemblies and curb weights that store kinetic energy.

Welcome to lightweight sporty car!

[Celica00]

this ^^
our car has a peppy throttle response from an already pretty light oem flywheel. unfortunately, the turn off is it is just as peppy at slowing down while coasting. but i havnt really had any issues w/ that personally.

it could also be the tires and wheels or anything else involving rotational mass

[Ben_G]

Originally Posted by industrial

Most normal cars have heavy ass flywheels, rotating assemblies and curb weights that store kinetic energy.

Welcome to lightweight sporty car!

Originally Posted by Celica00

this ^^
our car has a peppy throttle response from an already pretty light oem flywheel. unfortunately, the turn off is it is just as peppy at slowing down while coasting. but i havnt really had any issues w/ that personally.

it could also be the tires and wheels or anything else involving rotational mass

Ahhh.... Thanks!

[NickFRS]

Welcome to having a proper car.

[Xdragonxb0i]

So would it be better to coast in neutral ? Im slowing down but trying to keep my speed up as long as possible. I like to coast to a stop sign.

[wparsons]

Were your previous cars automatic or manual? Auto's will coast WAY longer than a manual in gear.

[SloS13]

Some threads on this forum are just retarded as balls.

[shu5892001]

Originally Posted by Xdragonxb0i

So would it be better to coast in neutral ? Im slowing down but trying to keep my speed up as long as possible. I like to coast to a stop sign.

Why don't you just keep your foot on the throttle longer and shorten your coasting distance lol

[naikaidriver]

Originally Posted by wparsons

Were your previous cars automatic or manual? Auto's will coast WAY longer than a manual in gear.

My curiosity is getting the best of me...

Why do you think that? That's a pretty broad statement and given the dramatic differences between new autos, new autos with locking torque converters, new autos with twin-plate clutches, old autos with stock torque converters and old autos with high-stall converters, why do you think all of these combinations would coast in gear longer than a manual?

Scott

[Xdragonxb0i]

Originally Posted by shu5892001

Why don't you just keep your foot on the throttle longer and shorten your coasting distance lol

why keep it on the throttle when i know im gonna stop? I drive this way to save gas, and save my brakes by not having to brake as hard. I usually drive this way because i am not in a hurry, i like to cruise =D

[wparsons]

Originally Posted by naikaidriver

My curiosity is getting the best of me...

Why do you think that? That's a pretty broad statement and given the dramatic differences between new autos, new autos with locking torque converters, new autos with twin-plate clutches, old autos with stock torque converters and old autos with high-stall converters, why do you think all of these combinations would coast in gear longer than a manual?

Scott

An automatic has a torque convertor, and will always decouple slightly on deceleration so they coast further/longer. Most don't lock up except when you're on the gas.

Any computer controlled manual (using a clutch, single or double) is still a manual, even if a computer and hydraulics are doing the work for you and will react like one.

Originally Posted by Xdragonxb0i

why keep it on the throttle when i know im gonna stop? I drive this way to save gas, and save my brakes by not having to brake as hard. I usually drive this way because i am not in a hurry, i like to cruise =D

Having more effective engine braking takes even more load off the brakes, so I don't see the issue here?

Something that hasn't been touched on yet is that when under engine braking above idle you're actually burning VERY little (or zero) gas, so it's better for economy to stay on the gas a bit longer then coast in gear letting the engine slow you down than to pop it into neutral and coast for longer.

[Ben_G]

Originally Posted by wparsons

Were your previous cars automatic or manual? Auto's will coast WAY longer than a manual in gear.

Mainly manual.... An Echo mostly...but driven lots of civics too... (Yes, different class if car completely)

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[Ben_G]

Originally Posted by wparsons

An automatic has a torque convertor, and will always decouple slightly on deceleration so they coast further/longer. Most don't lock up except when you're on the gas.

Any computer controlled manual (using a clutch, single or double) is still a manual, even if a computer and hydraulics are doing the work for you and will react like one.



Having more effective engine braking takes even more load off the brakes, so I don't see the issue here?

Something that hasn't been touched on yet is that when under engine braking above idle you're actually burning VERY little (or zero) gas, so it's better for economy to stay on the gas a bit longer then coast in gear letting the engine slow you down than to pop it into neutral and coast for longer.

Its not an 'issue' for me.... Just an observation.... I tend to coast in gear a lot when I see a red light ahead so that I don't need to come to complete stop before it turns green again, but I noticed that if I let off the gas where I usually do, I'll practically be at a complete stop half way to the light.

Didn't realize that a flywheel and/or other related mechanical bits would make such a huge difference between cars just rolling around.

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