Lightened flywheel quick Q

[mattjk]

Am I likely to see a drop in torque if I install a lightened flywheel?


Not clio relevant just in general..

 

[ben_p]

yes.

 

[172bagss2]

yes.

Why Captain?

 

[ben_p]

less wieght.

 

[172bagss2]

less wieght.

So the opposite of 'built for comfort, not for speed'??

 

[ben_p]

yes. lol.

 

[ben_p]

once a bigger mass is spinnig its more powerful than a compact disk spinning if you get what i mean.

there is a fine line to what weight they should be, as too heavy. there harder to spin etc

 

[172bagss2]

I see. I love it when you talk technical, tell me more....

 

[ben_p]

i know no more

 

[mini-valver]

See, I said that they lose inertia so can hinder more than perform sometimes and Fred being the big "I am" tried to say I was wrong. So FU Fred

 

[mattjk]

See I'm really not sure here Ben I personally dont think you would but I was hoping some others may have a better idea.


"Will installing a lighter flywheel make me lose torque?" And there was a simple answer: "No, you will gain torque." Granted, it won't affect peak numbers, but the flywheel has less inertia and will therefore transmit more to the ground during acceleration. It takes energy to spin a flywheel up to speed - that's energy being robbed before it gets to your wheels.

Mini-Valver - I think Freds right to be honest.

 

[Mark One]

"Will installing a lighter flywheel make me lose torque?" And there was a simple answer: "No, you will gain torque." Granted, it won't affect peak numbers, but the flywheel has less inertia and will therefore transmit more to the ground during acceleration. It takes energy to spin a flywheel up to speed - that's energy being robbed before it gets to your wheels.

I agree with that statement, completely makes sens from a physics/mechanics point of view.

 

[ben_p]

there was a artical online not too long ago, A guy did some tests on a paxo/gti engine

they used 4 fly wheels.

the lighter the wheel, the less torque they got on the RR.

 

[172bagss2]

"Will installing a lighter flywheel make me lose torque?" And there was a simple answer: "No, you will gain torque." Granted, it won't affect peak numbers, but the flywheel has less inertia and will therefore transmit more to the ground during acceleration. It takes energy to spin a flywheel up to speed - that's energy being robbed before it gets to your wheels.

I agree with that statement, completely makes sens from a physics/mechanics point of view.

And I love it when you guys talk like this. Give me MORE.

 

[mini-valver]

Once the flywheel is spinning, it has inertia to carry through to the wheels, the faster it spins, the more it takes to stop it=torque.

 

[Mark One]

i still don't get it ben. There isnt a formula in the world you could apply to make that work out.

Edit: Or I could just look up ^^

 

[ben_p]

See I'm really not sure here Ben I personally dont think you would but I was hoping some others may have a better idea.


"Will installing a lighter flywheel make me lose torque?" And there was a simple answer: "No, you will gain torque." Granted, it won't affect peak numbers, but the flywheel has less inertia and will therefore transmit more to the ground during acceleration. It takes energy to spin a flywheel up to speed - that's energy being robbed before it gets to your wheels.

Mini-Valver - I think Freds right to be honest.

i think that is dependent of what the starting mass was? and how well that was suited to the "engine" in question! and what engine is was fitted too! renault have a huge storke, but make good torque. a redtop for example is v short stroked revs lots and makes little torque, etc. the starting mass is the key IMO

if the above was true then i may be fitting a dinner plate on the end of my crank

its a true science.

 

[mattjk]

I have a friend who gained peak torque on an RR but you know what RRs are like!

Hmm I will do some more digging!

 

[172bagss2]

Don't stop....

 

[ben_p]

Once the flywheel is spinning, it has inertia to carry through to the wheels, the faster it spins, the more it takes to stop it=torque.

that fits in-line with my angle on this. the greater the mass the more force to stop

 

[172bagss2]

I have a friend who gained peak torque on an RR but you know what RRs are like!

Reliant Robin?

 

[Mark One]

BUT BUT BUT, hang on.

If the car is on a RR, then it's accellerating to create the power graph.
SO, the engine is accellerating the wheels and the fly.
So, if it was accellerating less fly then surely it would accellerate more wheel.
Agreed on lift off, the touque supplied while trying to slow the wheels would be greater with a bigger fly, But not under accelleration surely.

 

[ben_p]

I have a friend who gained peak torque on an RR but you know what RRs are like!

Hmm I will do some more digging!

on a lighter wheel ?

 

[ben_p]

BUT BUT BUT, hang on.

If the car is on a RR, then it's accellerating to create the power graph.
SO, the engine is accellerating the wheels and the fly.
So, if it was accellerating less fly then surely it would accellerate more wheel.
Agreed on lift off, the touque supplied while trying to slow the wheels would be greater with a bigger fly, But not under accelleration surely.

yes, but once a heavier balanced mass is spinning , its easier to drive faster and faster.it carries its momentum for longer with more force

 

[mini-valver]

That was my arguement anyway and I know for a fact on 8v Vauxhall's it's considered a bad idea. I'd presume the same arguement could be applied on a multitude of engines. Personally I think it's a waste of time.....

 

[Christopher]

Are clutches made of plastic or bread?

 

[ben_p]

Are clutches made of plastic?

christ, remember that one!

 

[mattjk]

Lighter flywheel = Less rotational mass = More power transferred to the wheels

So IMO you will gain torque and HP. Simple physics

(But I'm sure there is more to it than that!)

Thats how I looked at it anyway

 

[Christopher]

Mate, i remember crying in the office at it. PMSL! Hero!

 

[ben_p]

Lighter flywheel = Less rotational mass = More power transferred to the wheels

So IMO you will gain torque and HP. Simple physics

(But I'm sure there is more to it than that!)

Thats how I looked at it anyway

i am going to beat you with a stick!

 

[ben_p]

Lighter flywheel = Less rotational mass = More power transferred to the wheels

So IMO you will gain torque and HP. Simple physics

(But I'm sure there is more to it than that!)

Thats how I looked at it anyway

power - bhp yes
torque NO -imo.

two very differnet things!

 

[mattjk]

Stop papping my thread asswipes. grrr!

Lol come and get me whenever benji I'll be ready with my love trunchan

 

[mattjk]

Fair enough Ben but you have nothing to back your point up!

 

[ben_p]

BUT BUT BUT, hang on.

If the car is on a RR, then it's accellerating to create the power graph.
SO, the engine is accellerating the wheels and the fly.
So, if it was accellerating less fly then surely it would accellerate more wheel.
Agreed on lift off, the touque supplied while trying to slow the wheels would be greater with a bigger fly, But not under accelleration surely.

yes, but once a heavier balanced mass is spinning , its easier to drive faster and faster.it carries its momentum for longer with more force

 

[mini-valver]

You can over spin things remember! More weight, more inertia, harder to stop=more torque.

 

[172bagss2]

Stop papping my thread asswipes. grrr!

Lol come and get me whenever benji I'll be ready with my love trunchan

I hope Gray doesn't see this, he'll go NUTS.

 

[theduck]

Lighter flywheel = Less rotational mass = More power transferred to the wheels

So IMO you will gain torque and HP. Simple physics

(But I'm sure there is more to it than that!)

Thats how I looked at it anyway

power - bhp yes
torque NO -imo.

two very differnet things!

torque and bhp are related though...
iirc the formula si something like

BHP = (2 x pi x torque x revs) / 550

 

[mattjk]

Dont agree nancy boy (BenP)! I will have to take my own lines of investigation I think!!

 

[172bagss2]

Two many pies slows you down. Fact. My car is rapid yo. But i am a fat c*nt.

 

[mini-valver]

Matthew, put down the keyboard and get back in your cage

Paul, you need to have sex.