Flywheels For 240Z L28

[Gtv240z]

Hi,

 

Just wondering if Ican get some help from someone who knows more on the topic of flywheels.

 

I want a flywheel for an L28 in the process of being built. I would prefer a lightened one but might go for a standard one remachined for less weight.

 

I am running the 260z style CR gearbox.

 

I am unsure if i have a 225mm or 240mm flywheel currently and assume 240mm is better and wondering can i use one?

 

I am rebuilding a Z24 2.4 litre engine at work for a tow tug which appears very similar to the L engine.

 

would a flywheel from a D21 navara with the Z24 engine fit an L28?

 

the reason i ask is  I can get these for about $25. and not sure if i will find a L flywheel in good condition at a good price.

 

I might call  Australian clutch service tomorrow and see if new ones exist..

 

Any insight greatly appreciated

 

 

 

Cheers,

 

Craig

 

 

 

 

 

 

 

[pauly_adams]

im not positive but fairly sure you can use a z24 flywheel, that being said, you should be able to get a 225mm flywheel cheap. what is your power goal ?

[dat2kman]

It's going to get costly getting one sent, due to the weight.

I have a few to suit 200mm clutch, and 1 to suit 225mm, all are L units.

 

It is possible the Z engined one may fit, as might a KA engine flywheel, iyou'd need to compare them.

 

Gve a call to one of the specialist Datsun prep shops down there, MadDat, Datsport, or ask Stew Wilkins Motorsport.

Another shop, in NSW, ( phone call!) is Waterhouse Perfrmance, they'll be able to advise?

[Bonkers]

The Z24 flywheel will fit . But as they are for a Narava they are heavy . Not ideal for competition . But for road use I have been using one for 14 years because the surface contact is much greater than the Z's. They are a machinist delight ,so much metal to come out. You may have to machine down the L series flywheel bolts to clear the clutch plate when you assemble the package. I have left mine standard as on the road for highway you get good mileage out of it . But I have also use the car in a number of sprint meetings and held my own in competition . It is good knowing you can take metal out to improve performance if you want to.     

[PeterH]

The Z24 flywheel will fit . But as they are for a Narava they are heavy . Not ideal for competition . But for road use I have been using one for 14 years because the surface contact is much greater than the Z's. They are a machinist delight ,so much metal to come out. You may have to machine down the L series flywheel bolts to clear the clutch plate when you assemble the package. I have left mine standard as on the road for highway you get good mileage out of it . But I have also use the car in a number of sprint meetings and held my own in competition . It is good knowing you can take metal out to improve performance if you want to.     

I'm interested in what you wrote about the Navara flywheel.  My car was an auto when I bought it but it came with most of the parts for a manual conversion. The fly wheel was in a very bad way...deep heat cracks and hard glazed spots so I bought a new one from a Nissan dealer. I quoted a 240z part number and he said it had been superseded to a Navara. It was dimensionally  the same as the one that I had but I have no idea what that came out of. Do you , or any one else ,

have any idea what the weight of the 240Z flywheel would be? Might be hours of fun on the lathe coming up 

[Gtv240z]

I'm interested in what you wrote about the Navara flywheel.  My car was an auto when I bought it but it came with most of the parts for a manual conversion. The fly wheel was in a very bad way...deep heat cracks and hard glazed spots so I bought a new one from a Nissan dealer. I quoted a 240z part number and he said it had been superseded to a Navara. It was dimensionally  the same as the one that I had but I have no idea what that came out of. Do you , or any one else ,

have any idea what the weight of the 240Z flywheel would be? Might be hours of fun on the lathe coming up 

 Very interesting .. do you know the 2 part numbers?

[HKSZ]

L24 mr30 skyline flywheel is the the pick at 8kg factory,

most other L24 L28 etc are 10.5 to 11kg standard.

[PeterH]

 Very interesting .. do you know the 2 part numbers?

The part number I asked for was 12310-P0100 which is listed as L24 / L26 12/72 on

the number superseded to is        12310-G8806

 

The weight of the new one is 10.1 kg on one set of  scales and 9.8 kg on another...so 10 kg sounds about right.

[Bonkers]

I guess pictures at worth a 1000 words.

I am guessing  Peter you may have to purchase the whole flywheel and clutch assembly to bolt on to a Lseries engine.

But you can drill and tap 3 extra 8 x1.25 bolt holes as the Navara pressure plate or at least most of them use 9 bolts to assemble to the flywheel. Unlike the z which uses 6. But having said that this may just be the difference between the 225mm and 240mm assembly. Looking at the two assemblies it does not make much sense to fit a 240 pressure plate to a flywheel meant to have a 225 assembly as the flywheel side of the clutch plate will only have the contact patch of a 225 plate. Having also said that it will depend on the flywheel you have to start with that is in your Z . I have seen many a strange combination over 30 years or more.

Hopefully this will shed some light on the differences between the 2 assemblies.      

[PeterH]

Thanks for that.... I hope it's  helping Craigz who started the thread. a photo attached of my flywheel and clutch. 230 mm pressure plate 225 mm friction plate and the fly wheel is drilled to suit that clutch and it came complete with cast iron shavings from the tapped holes.

The car will be pretty much standard so I didn't worry about performance clutches.

I assumed when they said it was a Navara clutch it was a petrol engine not diesel ...not sure if that would make a difference.

Edited August 14, 2016 by PeterH

[Gtv240z]

Yes! thank you all for your input! looks like there are quite a few different options .

I have had my gearbox in and out 3 times in the last 3 months, got it down to 43 minutes one way!

Sadly i never bothered to pull the clutch off and find out what i currently have but would assume it's factory fitted 240z still...