Author Topic: Lighter flywheel (Read 7474 times)

nokivasara · « **on:** January 20, 2008, 08:07:40 am »

I´ve read a bunch of make-your-car-superfast-threads and I noticed a lot of you have lightened flywheels.
I thought that lighter flywheels on a diesel only would do harm, causing the engine to stall really easily.
Is there any point in lightening the flywheel on a 1.9 N/A without any other mods?

jimfoo · « **Reply #1 on:** January 20, 2008, 08:22:51 am »

Less rotating mass, especially on the crankshaft translates into faster acceleration as the engine can rev quicker, at least in lower gears.

bjornmk1 · « **Reply #2 on:** January 21, 2008, 06:54:22 am »

although new here on this forum...

from own experience I can tell you:a lighter flywheel certanly has it's benefits

pro :the car accelerates quicker

contra :the enginebreak is less effective .

and in my opinion as long as the whole rotatingmass is balanced
there is no extra wear on the engine.

just my 2cts. :wink:

zukgod1 · « **Reply #3 on:** January 21, 2008, 11:32:02 am »

If I could find one for my mk2 I'm building I would be all over it, heck I would have one lightned if I only knew where to have the material removed from..

Baselyne · « **Reply #4 on:** January 21, 2008, 03:05:53 pm »

I was just going to ask that... where does this meterial come off of?

TedV · « **Reply #5 on:** January 21, 2008, 09:12:22 pm »

Everywhere except the ring gear, bolt and disk area :wink: :lol:

lightened steel 210mm at Euro Sport I believe that is where my "heavy" spare light flywheel came from. the asembly I put in to try is a touch over 15 lbs presure plate, disk, flyweel, TO plate and bolts.

OM617 · « **Reply #6 on:** January 21, 2008, 11:42:07 pm »

Lightened flywheel means less torque off idle but faster acceleration through the RPM range.

Weight should come from as close to the outside diameter diameter as possible. 1 pound from the outside diameter would be the same as several pounds closer to the center.

Baselyne · « **Reply #7 on:** January 22, 2008, 05:52:09 am »

so in theroy someone could defonetley take an machine their own?

i suppose any machine shop would'nt have a problem with cutting it down alittle here and there...

What would someone propose it would cost to have something like this done as appose to buying one from somewhere...

alum ones can't possibly last as long as the metal oE ones
what's your thoughts?

subsonic · « **Reply #8 on:** January 22, 2008, 07:24:04 am »

There is one careful word to remember, balance.

It's not a take some off here and there proposistion. It needs to be exact or you will have a fly wheel that is off balance and vibrates like crazy.

Gearhead · « **Reply #9 on:** January 22, 2008, 08:01:35 am »

The aluminum ones I've worked with would last longer than OE steel, theoretically. They had steel ring gears that were replaceable and steel friction plates that bolted to the aluminum flywheel that were replaceable as well. These weren't VWs, though. They were on RX-7s spun to 10,500 RPM.

jimfoo · « **Reply #10 on:** January 22, 2008, 08:44:13 am »

I have an aluminum GM/Ford one that has a replaceable ceramic type friction plate.

myke_w · « **Reply #11 on:** January 22, 2008, 01:03:50 pm »

ECS tuning has some decent kits..

http://www.ecstuning.com/stage/edpd/pagebuild_v2.cgi?searchstring=flywheel&searchqt=byvehicle&make=Volkswagen&model=Jetta+II&submodel=&engine=16v

Baselyne · « **Reply #12 on:** January 22, 2008, 09:43:41 pm »

There seem to be some decent prices online there as well...

Im told the 16v an most all vw clutchs are the same is this true?

myke_w · « **Reply #13 on:** January 22, 2008, 11:47:45 pm »

the tranny you are using determines the clutch...

the 16v and ABA 2.0 motors use a tranny with a bigger spline on the main shaft, the hot setup is to get a 16v pressure plate and a good 8v clutch disc.

the splines on the main shaft on ALL other 020 tranny's are the same size.

Baselyne · « **Reply #14 on:** January 23, 2008, 05:55:39 am »

So the tranny to have is most likly the larger spline shaft version?

Im guessing that using a gasser tranny would be a better option?

Author Topic: Lighter flywheel (Read 7474 times)

Baselyne

OM617

Baselyne

Baselyne

Baselyne