Tēma: Atvieglināts spara rats?

Kopš: 04. Dec 2006

No: Rīga

Ziņojumi: 7247

Braucu ar: Prāmi B-)

2007-09-13 16:52, user111 rakstīja:
Kaspich neviens jau tev neliek atbildēt..Tiem kam ir laiks tie atbild, paldies viņiem!!!..es centīšos ar to pašu darīt...

Ok, let’s break it down to basics...

Mass = Inertia

Inertia = Resistance to motion change

If you have more mass, you have more inertia... and therefore more resistance to change in motion. Objects with more inertia require more force to change their direction/speed/motion than objects of lower inertia.

In the case of the heavy flywheel, that’s more resistance to acceleration as well as deceleration. When your engine is spinning in neutral and you engage the clutch to start moving, the flywheel helps your engine overcome the added load of the car’s mass... effectively, the inertia of the flywheel (spinning) helps to overcome the inertia of the car (sitting still, not wanting to move). If your flywheel weighs 20 pounds and your car weighs 2000 pounds, you can see that a 20 pound flywheel will help to move the car better than a 10 pound flywheel will. It resists the change in motion that the car is imparting upon it more than the lighter flywheel, so it will require less input from the engine, and start the car moving along a bit smoother.

Analogy:

Ever go bowling? Compare an 8 pound bowling ball to a 16 pound bowling ball. The 8 pounder is easier to accelerate (from the stopped position to you throwing the ball at higher speed) and easier to direct (aim). Your arm also gets less tired with the 8 pound ball. The drawback is that the ball loses more speed toward the end of the bowling lane, and may not knock down as many pins as you want. You also have to be more careful with controlling the direction of the ball, since it’s easier to fling out the wrong way if your arm twitches or something The 16 pound bowling ball is harder to accelerate and harder to direct, but it carries more speed at the end of the bowling lane because of its higher mass (and resulting higher inertia). It knocks more pins down. It’s also harder to send the ball careening into someone else’s bowling lane, because it’s harder for your arm to suddenly jerk it to the side.

Now relate this analogy to a car... the pins at the end represent your car’s weight/mass, the bowling ball is the flywheel, and your arm is the engine. The lighter flywheel will be easier to accelerate and decelerate- so you’ll have quicker starts, faster acceleration because the flywheel has less inertia to overcome, and quicker shifts because the revs drop faster when you let off the throttle. The downside is that you have to control the flywheel more, since the direction (speed of rotation) varies that much more. This is why people say that an "8 pound flywheel isn’t good for a daily driver". I don’t have any problem driving with mine. The heavier flywheel has higher inertia than the lighter one, so it will start your car from a stop more easily (knock down more pins), but it will hurt you everywhere else. It takes more force/power to accelerate (overcoming more inertia), doesn’t allow you to shift as quickly (revs don’t drop fast enough), but it is easier to drive because the speed of rotation doesn’t change as rapidly as the lighter flywheel. Small changes in your throttle position don’t change the revs as much, because the power blips are just soaked up in the heavier flywheel. This is why people might think that "a lighter flywheel takes more gas while cruising", because that lighter flywheel takes more attention at the gas pedal than the heavier one to maintain speed. The lighter flywheel will give you better gas mileage.. ever push that 8 pound bowling ball on the ground at a constant speed? Now try the 16 pounder- which one takes more energy to push? The 16 pounder. It’s the same as the flywheel.

Do you lose torque with the lighter flywheel? Yes and no. You lose torque to start the car moving, since less energy is stored in the flywheel- so you have to apply more torque from the engine. On the other hand, you use less torque to overcome the inertia of the flywheel while accelerating and decelerating, so you can use the torque from your engine more effectively. You don’t lose any torque when going to a lighter flywheel- you just change the source and application of torque in your car’s drivetrain.

So...

Light flywheel: better acceleration, better mileage, takes more skill to drive
Heavy flywheel: worse acceleration, lower mileage, takes less skill to drive

It’s that simple.

Kopš: 15. Oct 2006

Ziņojumi: 85

Braucu ar:

Kopš: 15. Oct 2006

Ziņojumi: 85

Braucu ar:

Kopš: 15. Oct 2006

Ziņojumi: 85

Braucu ar:

Kopš: 13. May 2002

No: Rīga

Ziņojumi: 24389

Braucu ar: Daimler Super V8, BMW 528iA, Audi A3 Sportback 2.0TFSI quattro

Kopš: 15. Oct 2006

Ziņojumi: 85

Braucu ar:

Kopš: 15. Oct 2006

Ziņojumi: 85

Braucu ar:

Kopš: 18. May 2002

No: Rīga

Ziņojumi: 6281

Braucu ar: PORSCHE

Kopš: 15. Oct 2006

Ziņojumi: 85

Braucu ar:

Kopš: 20. Feb 2004

Ziņojumi: 28219

Braucu ar: Slēgta tipa visurgājēju

2007-09-13 17:59, user111 rakstīja:
Nu interesanti, 80ls par reduktoru, nav tāka biski pa daudz, ja nu vienīgi bloķis!!!Es laikam palikšu uzticīgs BMW

Kopš: 31. Jan 2006

No: Rīga

Ziņojumi: 1233

Braucu ar: E12 525, 528

2007-09-13 16:36, andis525 rakstīja:
vinjam vins bija salūzis vareja redzēet ka dzeks vinju ir karsējis vins šķersgriezumā līdz pusie bija zils uzkarsēts. es arī kadreiz domāju ka tas kāds blefs bet tagad es ta vairs nedomāju.mašīnai visa priekša kārbas pusē sastista kārba čupa kapotu vispār atsita vaļa skats tads ka kāds būtu vinai taja stūri ievilcis aar mašinu

Kopš: 13. May 2002

No: Rīga

Ziņojumi: 24389

Braucu ar: Daimler Super V8, BMW 528iA, Audi A3 Sportback 2.0TFSI quattro

2007-09-13 18:48, Dullais rakstīja:
(..) Ko te var lieki runāt, apvainoties uz citiem mazgadīgajiem, kas pie datora ēd konfektes un prieka pārpilni apdirš tevi? (..)

Kopš: 28. Jun 2007

No: Rīga

Ziņojumi: 3405

Braucu ar:

2007-09-13 17:59, user111 rakstīja:
Nu interesanti,80 ls par reduktoru, nav tāka biski pa daudz, ja nu vienīgi bloķis!!!Es laikam palikšu uzticīgs BMW

Kopš: 18. May 2002

No: Rīga

Ziņojumi: 5153

Braucu ar: Husky FC450 '15, CBF1000 '08, KTM Ark Minarelli 2T un lodāmuru pa plati

2007-09-13 20:18, KRS2 rakstīja:

2007-09-13 17:59, user111 rakstīja:
Nu interesanti,80 ls par reduktoru, nav tāka biski pa daudz, ja nu vienīgi bloķis!!!Es laikam palikšu uzticīgs BMW

spararata atvieglināšana, balansēšana, balansēšana ar sajūga grozu Tev maksās 70Ls
(vismaz Rīgā)

<font size=1>[ This message was edited by: KRS2 on 2007-09-13 20:18 ]</font>

Kopš: 28. Jun 2007

No: Rīga

Ziņojumi: 3405

Braucu ar:

2007-09-13 20:20, Indo rakstīja:

2007-09-13 20:18, KRS2 rakstīja:

2007-09-13 17:59, user111 rakstīja:
Nu interesanti,80 ls par reduktoru, nav tāka biski pa daudz, ja nu vienīgi bloķis!!!Es laikam palikšu uzticīgs BMW

spararata atvieglināšana, balansēšana, balansēšana ar sajūga grozu Tev maksās 70Ls
(vismaz Rīgā)

<font size=1>[ This message was edited by: KRS2 on 2007-09-13 20:18 ]</font>

Neskaitot darbu...

Kopš: 04. Dec 2006

No: Rīga

Ziņojumi: 7247

Braucu ar: Prāmi B-)

2007-09-13 17:03, user111 rakstīja:
Piekrītu par to ka pašam jāmeklē, bet nu tā sanāca ka iedomājos un powerā neatradu nevienu topiku par šo tēmu, tapēc arī ieliku, sorry ja kādam tādēļ radās problēmas..Tāds nebija mans mērķis, es tikai gribēju uzzināt kur to var izdarīt Latvijā, prieks ka cilvēki palīdz..

Kopš: 11. Aug 2005

Ziņojumi: 3843

Braucu ar: Kas ir ar to arī braucu!

2007-09-13 17:51, Martini rakstīja:
paklausies ko gudrs vecis tev saka.. tev vaig reduktora iekšas ford sierra 2,0 dīzeļa un uzrāviens būs nereāls! jo būs pareizās attiecības un iet iekšā e30 reduktorā tie zobrati! man tieši mētājās laukos tāds vesels reduktors pārdošu par kādi 80 Lati

Kopš: 15. Oct 2006

Ziņojumi: 85

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Kopš: 18. May 2002

No: Rīga

Ziņojumi: 6281

Braucu ar: PORSCHE

Kopš: 12. Apr 2005

No: Rīga

Ziņojumi: 1800

Braucu ar: ratiem