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Mildman
Flywheel prep required before install
#1
No life (a.k.a. DattoMaster)
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Hey all,

Just about to put the flywheel/clutch/gearbox back on the A14 I've been building up.

Should I have the flywheel polished, roughed up, cleaned....etc. - prior to installation? Or are they fine to use as is. Never looked at a flywheel before so have no experience in determining wheter either of these flywheels is OK to just bolt back up to the engine AS IS.

It looks pretty rusty, except on the friction surface, see photos.

I plan on using an A12 flywheel, rather than the A14 one also for weight.
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Posted on: 2006/3/8 22:44
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Mildman, Datsunless
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Re: Flywheel prep required before install
#2
No life (a.k.a. DattoMaster)
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you should have it lightened too...significant gains in the way the engine revs only $100 to lighten an A series flywheel.

Posted on: 2006/3/8 22:53
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Mildman
Re: Flywheel prep required before install
#3
No life (a.k.a. DattoMaster)
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Yeah could do that I suppose.
I imaging that is a job any engine builder could do?

But if I wanted to be a cheap arse - would you agree that it is OK to reinstall the flywheel as is? The friction surface is pretty shiny - wasn't sure if it should be a bit rougher....

Posted on: 2006/3/8 23:15
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YRL05S
Re: Flywheel prep required before install
#4
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I've installed worse.
Rough it up a bit first though.
Recently installed a flywheel that's been sitting in a chookshed into my 120Y (this is temp, max 6 months)

Posted on: 2006/3/8 23:38
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stirlingmac
Re: Flywheel prep required before install
#5
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For years I've just given the clutch face a skim in the lathe but clutch manufacturers state in there instructions that the face should be surface ground. The theory is that the swirled ground finish is less likely to slip compared to the regular turned surface. Also grinding is better if you have any hard spots in the face causing by rivets rubbing if the cluch plate has been badly worn at some stage.

Posted on: 2006/3/9 0:16
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Cable_Tie
Re: Flywheel prep required before install
#6
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If you are getting it lightened/ground, while you are at it, get them to put a step in it.

This will give the pressure plate a bit more clamping pressure.

Otherwise, get it redowelled for an L series pressure plate. Just fits inside the bellhousing. Sure it is a bit more weight, but it will be the cheapest way to stop slip for a hipo engine. I think you need clutch plate from a gemini(yuck) or Jackaroo to match the splines. Last time I replaced the clutch, it was ~$100. (180B HD Kit, Shop had no dramas swapping the clutch plate to an Isuzu)

Or, that flywheel will be fine. The clutchplate will get rid of that surface rust on the first drive.

Posted on: 2006/3/9 2:04
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AdamBDA
Re: Flywheel prep required before install
#7
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Quote:

Mildman wrote:
Hey all,

Just about to put the flywheel/clutch/gearbox back on the A14 I've been building up.

Should I have the flywheel polished, roughed up, cleaned....etc. - prior to installation? Or are they fine to use as is. Never looked at a flywheel before so have no experience in determining wheter either of these flywheels is OK to just bolt back up to the engine AS IS.

It looks pretty rusty, except on the friction surface, see photos.


All flywheels done by us are stone ground prior to fitting a new clutch. We never put a new clutch in on an unground flywheel even if an identical plate has just come out of the vehicle.
We would also dowel it and have the pressure plate dowelled if it does not come with them.
Whilst we have a quite light flywheel in the race car we left the road car at standard weight even though the engine is one of our old race engines with quite respectable power/torque
Adam

Posted on: 2006/3/9 2:53
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Mildman
Re: Flywheel prep required before install
#8
No life (a.k.a. DattoMaster)
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Sounds like I should get a machinist to grind, and maybe lighten the flywheel at the same time.

Although what are the risks or problems if I dont get the flywheel reground.

Last thing I want is drama's with clutch slip...here's the clutch going in it...R-fastmotorsport will recognise it.

Now I don't want to trust flywheel machining to just anyone...has anyone had experience with a company in SE Melb that know what they are doing?

Heres the clutch pic

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Posted on: 2006/3/9 3:35
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Re: Flywheel prep required before install
#9
No life (a.k.a. DattoMaster)
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definatley do the flywheel and lighten it...$$$ really well spent.
roughen the pressure plate and the friction plates on the clutch plate with 600 and place in the car. This clutch being 4 puck brass button will last some time and will see you through many years. Money well spent..it will ake abig difference.

Posted on: 2006/3/9 4:17
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Mildman
Re: Flywheel prep required before install
#10
No life (a.k.a. DattoMaster)
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Cool

I just checked with the engine builder who decked my head. Blackwell Engines.

A mate of mine had his flywheel lightended there and said he does an excellent job, so I'll contact him about it.

I might as well do it all now with the engine out of the car....leads me to one more question.

Which flywheel should I take to the engine builder to lighten? The A12 or the A14 one? Seeing though he will lighten it anyway does it matter if I use the A14 one now?

Posted on: 2006/3/9 4:21
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