About to start my first turbo build... b16a

[VTi_b0i]

2860rs with a .86 rear of course!

SAme as mine y0

[FastFwd]

The momentum lost is going backward on a boosted setup in IMO but each to there own I guess

Yeh your prolly right but the difference isnt much...

I put it in while i was NA.

[MacDiZZle]

The momentum lost is going backward on a boosted setup in IMO but each to there own I guess

i disagree... i think the the weight of the flywheel has a big impact on both acceleration and deceleration. in acceleration the engine can get the flywheel spinning quicker and continue to build up momentum quicker. As long as you have your foot planted and the engine is making power then that power is being applied to the wheels 'quicker' if you get what i mean. (especially as hondas dont have much tourqe in the first place).

it also helps in deceleration as when your down shifting the engine doesnt have to pull up this big heavy spinning chunk of metal... less centrifigal force (i think its called lol).

as long as you are driving with WOT and are shifting gears pretty quick. i only see a lightened flywheel helping. it would only be bad if you were cruising on the highway or maybe hillclimbs.??

just my opinion

[FastFwd]

i disagree... i think the the weight of the flywheel has a big impact on both acceleration and deceleration. in acceleration the engine can get the flywheel spinning quicker and continue to build up momentum quicker. As long as you have your foot planted and the engine is making power then that power is being applied to the wheels 'quicker' if you get what i mean. (especially as hondas dont have much tourqe in the first place).

it also helps in deceleration as when your down shifting the engine doesnt have to pull up this big heavy spinning chunk of metal... less centrifigal force (i think its called lol).

as long as you are driving with WOT and are shifting gears pretty quick. i only see a lightened flywheel helping. it would only be bad if you were cruising on the highway or maybe hillclimbs.??

just my opinion

Your 100% correct in what your saying dude on an NA but on a heavier flywheel it builds up momentum being heavier so under load or on the freeway while the momentum has built up it gives the car a little more torque.

Removing some of that weight from the flywheel and you loose a little torque from the built up momentum of the heavier flywheel. On an NA build its a little different. 160KW b16a NA has a lot more torque than a 160KW Turbo b16a. i think thats why he meant on a turbo build its not necessary for a lightened flywheel.

Well thats just some sketchy info i've learnt.

[Lukezen27]

i disagree... i think the the weight of the flywheel has a big impact on both acceleration and deceleration. in acceleration the engine can get the flywheel spinning quicker and continue to build up momentum quicker. As long as you have your foot planted and the engine is making power then that power is being applied to the wheels 'quicker' if you get what i mean. (especially as hondas dont have much tourqe in the first place).

it also helps in deceleration as when your down shifting the engine doesnt have to pull up this big heavy spinning chunk of metal... less centrifigal force (i think its called lol).

as long as you are driving with WOT and are shifting gears pretty quick. i only see a lightened flywheel helping. it would only be bad if you were cruising on the highway or maybe hillclimbs.??

just my opinion

hhmm

No

For one this statement is the complete opposite IMO

Edit I see what your says but still think heavier is better

""as long as you are driving with WOT and are shifting gears pretty quick. i only see a lightened flywheel helping""

Your 100% correct in what your saying dude on an NA but on a heavier flywheel it builds up momentum being heavier so under load or on the freeway while the momentum has built up it gives the car a little more torque.

Removing some of that weight from the flywheel and you loose a little torque from the built up momentum of the heavier flywheel. On an NA build its a little different. 160KW b16a NA has a lot more torque than a 160KW Turbo b16a. i think thats why he meant on a turbo build its not necessary for a lightened flywheel.

Well thats just some sketchy info i've learnt.

Yeah and theres's a reason why the yanks change back to heavier flywheels when they start pushing out big numbers on there turbo setups

On our setup 160kw 200kw turbo I doubt theres much as you've said just a waste of cash if you don't already have one

[MacDiZZle]

This explains what i mean better then i can lol

"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."

(btw this is not my stuff its off hondaswap.com)

i think in a drag racing application it can be more benificial to have a heavier flywheel then it would in cuircut racing as you do not rely on acceleration and deceleration like you do on the track. i think its about striking it even for your style of driving.

its like most things in motorsport you give a bit here and loose a bit there. in the end its whether or not its making you go faster round the track (or down the strip if thats your thing )

[MacDiZZle]

Sorry I didn't find ya pal, had a lot on.

How much did you pick it up for? Guess it sealed the deal with the ride in mine

Haha yep i loved it

got it for $1310 and a free garret hat and a free ticket to the finals on sunday

[Lukezen27]

NA ref yeah?

And I drag race not track so that's about right as to why I like the heavier flywheel.


PLUS I've had both setups

My last setup turbo I had a stcok 12kg flywheel for about a year..

When my clutch died and changed to a 3.9kg flywheel

I hated it, car felt weaker and didn't pull as well or as smooth

So if you track go light and if your 1/4 mile go heavy

[MacDiZZle]

NA ref yeah?

And I drag race not track so that's about right as to why I like the heavier flywheel.


PLUS I've had both setups

My last setup turbo I had a stcok 12kg flywheel for about a year..

When my clutch died and changed to a 3.9kg flywheel

I hated it, car felt weaker and didn't pull as well or as smooth

So if you track go light and if your 1/4 mile go heavy

agreed! mine isnt that light but! mines like 4.2 or 4.9 or something its cromoly not alloy.

i thought the stock one was like 6.9. and yer lightweight flywheels are not smooth.

[FastFwd]

agreed! mine isnt that light but! mines like 4.2 or 4.9 or something its cromoly not alloy.

i thought the stock one was like 6.9. and yer lightweight flywheels are not smooth.

im pretty sure the stock is close to 13kg if i can remember correctly.

I might change back to stock on my next clutch...should be a years time lol. Cbf doing it now.

[MacDiZZle]

13kg Sh*t thats heavy! it doesnt feel that heavy when u take it off the car!

[MacDiZZle]

sorry to drag this thread on and on but the banjo bolt for the oil feed that i got with the turbo kit is too long... can anyone give me the size bolt i need as well as the restrictor hole size... it looks about 3mm atm but i remember reading that you need like 1.5 can anyone confirm?