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 Post subject: flywheels
Posted: Thu Jul 20, 2006 7:20 pm 
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whats the go with them... im going to be putting a manual into my ed fairmont an while im in the process of this i thought i might look into a couple of things one of which is the flywheel.
wondering what would be the best thing to do, just get it lightend or buy a new performance one (if there are any out there), reason i ask is i dont think i have ever herd of a stronger light weight flywheel being made for an eseries

any susgestions, opinions would be great

 

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Posted: Thu Jul 20, 2006 7:23 pm 
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Only reason for running a lightweight flywheel is so that they reach peak revs faster. Balancing would be my suggestion but I am not sure if they can balance the clutch on its own :?

 

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Posted: Thu Jul 20, 2006 7:27 pm 
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I wouldnt get it lightened. There are bigger better flywheels available but I wouldnt bother unless it was a very serious engine.

 

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Posted: Thu Jul 20, 2006 7:28 pm 
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wouldn it be best to balance everything at once? im already planing on getting my tailshaft balanced, was thinking of building a new engine sometime in the near future and getting all the blueprinting and balancing done to that

 

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Posted: Thu Jul 20, 2006 7:32 pm 
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how much better are we talking about? the sort of better that you could really only notice with a high performance engine, that sort of better?

i have so many things running threw my head that i want to do but i somehow find it hard to save my money each week :(

 

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Posted: Thu Jul 20, 2006 7:37 pm 
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Blueprinting is a waste of money unless you are building a realllllllly serious engine. Balancing on the other hand is priceless. If you are considering building a new engine this should be at the top of the list. This includes everything from the harmonic balancer, rods, pistons, crank, clutch and flywheel.

 

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Posted: Thu Jul 20, 2006 7:42 pm 
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adrian` wrote:
how much better are we talking about? the sort of better that you could really only notice with a high performance engine, that sort of better?

i have so many things running threw my head that i want to do but i somehow find it hard to save my money each week :(


Better as in lets you use bigger clutches. Light flywheels have there disadvantages for street use.

 

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Posted: Thu Jul 20, 2006 7:48 pm 
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what sort of disadvantages are we talking about here? i never thought there could be a disadvantage

 

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Posted: Thu Jul 20, 2006 7:52 pm 
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Heavy flywheel makes the engine smoother, easier to drive, and launch harder

A light flywheel accelerates better in gear at the expense of ^^^


It also depends on how much lighter you want to go as well

 

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Posted: Thu Jul 20, 2006 7:52 pm 
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The reason a flywheel is heavy is to keep inertia going in an engine at low revs. If you lighteb this then you have to run higher revs to keep the car idleing. Also if you have your standard flywheel lightned then material is removed. Removing material=weaker=possible destruction=possible spending big dollars=no beer or rum= :cry:

 

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Posted: Thu Jul 20, 2006 7:55 pm 
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haha i see your point... one thing we cant have is no beer or rum can we. might just leave it the way it is then

 

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Posted: Thu Jul 20, 2006 7:57 pm 
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uhhh noob question......what does the balancing do? is it self explanatary? (excuse spelling)

 

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Posted: Thu Jul 20, 2006 8:06 pm 
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When an engine is built en-masse it is a compromise. They wanna turn em out quick but they also have to keep them in tolerance and at a cheap price. So they balance them so that when you drive 'em normal thay seem pretty smooth but rev em hard and they vibrate. Vibrations kill engines. So when an engine is balanced much tighter tolerances are used. Each piston is weighed then each piston is machined on the gudgeon pin bosses until they all weigh the same as the lightest one. Then the rods are set up on a jig with the small end sitting on some scales. Again the boss on top is ground till they weigh the same. This process is reversed for the big end. The toal weight of the piston and rod combination is then calculated and each counterweight on the crank is machined to weigh the same. This is then coupled to the harmonic balancer, flywheel and clutch and the rest is balanced as a unit in something that could be called akin to a large lathe.
I think that about sums it up

 

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Bulldog the Diamantina pin its ears down flat

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Posted: Thu Jul 20, 2006 8:08 pm 
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pretty much explains itself... an dont worrie no questions is for yourself, i ask some dumb questions too :)

 

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Posted: Thu Jul 20, 2006 8:14 pm 
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hahah well wasnt my answer just so much smaller then yours :D

 

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