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Main : Mechanical : Drive Train Lightened Flywheel

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Lightened Flywheel
Lightened FlywheelPopular
SubmitterstirlingmacMore Photos from stirlingmac   Last Update2003/2/25 9:30    Tell a friendTell a friend
Hits7208  Comments15    0.00 (0 votes)0.00 (0 votes)
Factory issued dimensions for lightening a standard A12 flywheel

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Poster Thread
stirlingmac
Posted: 2007/11/19 8:50  Updated: 2007/11/19 8:50
Home away from home
Joined: 2000/5/6
From: Wellington New Zealand
Posts: 962
 Re: Lightened Flywheel
Heres a clearer version I drew up years ago, machine away !!!

Poster Thread
Lobster
Posted: 2003/2/28 4:37  Updated: 2003/2/28 4:37
No life (a.k.a. DattoMaster)
Joined: 2002/8/25
From: Canberra, Australia
Posts: 1618
 Re: Lightened Flywheel
I used the A12 flywheel when I put my A15 in the car.
Then also a few months ago I also got the flywheel lightened when I changed the clutch.

Again, I recoomend this to anyone qho is changing the clutch or gearbox or has the engine out.
Makes a nice improvement...

Poster Thread
cfwase
Posted: 2003/3/1 1:38  Updated: 2003/3/1 1:38
Home away from home
Joined: 2002/6/17
From: auckland, new Zealand
Posts: 154
 Re: Lightened Flywheel
how much better is it than the A15 one?
and are you still gunna S/C your engine LOBBY?

Poster Thread
Lobster
Posted: 2003/3/1 14:42  Updated: 2003/3/1 14:42
No life (a.k.a. DattoMaster)
Joined: 2002/8/25
From: Canberra, Australia
Posts: 1618
 Re: Lightened Flywheel
I have never tried to A15 one. I still have it in my parents garage. It is heavier... ( Ithink). I never really looked at it.
I might go and weigh it tomorrow.
Martins Datsun 1200 page was what I was going by when I swapped engines and it said to use the A12 flywheel. So I did...

Yeah, still gonna Supercharge eventually. It's just that funds are really tight at the moment. Used to have some nice high paying cooshy office jobs, now am stuck workign at Pizza Hut again...
Doh.
I'm hoping to hurt myself at work though and get a nice cash settlement...
The supercharger I have is too big for where I wanna put it. There are some guys at the exhaust place near discount tyres in belconnen, Canberra who have had a 1200 with an A14 running with the 4agze type s/c. And I am pretty much going to copy how they set it up I think. The 4agze one has a clutch in it anyway, so that would be better. I could have a switch in the car that turns the supercharger on or off depending on how I feel...
Also there is a guy who works at that exhaust place that has a 120Y with a 4agze complete engine in it.
Very classy...
Hmmm This was a big post....

Poster Thread
D
Posted: 2003/3/2 13:03  Updated: 2003/3/2 13:03
No life (a.k.a. DattoMaster)
Joined: 2002/10/28
From: on my stationary Earth @ 0 km/h
Posts: 10844
 Re: Lightened Flywheel
What 3 kgs!!! Now that sounds yummie
I wonder what clutch I could use with something like that?? How much did it cost? cause Here alloy race tech did one for dattoman for 470. Id like to use a clutch from and l18 or something else but I wonder wether my dogleg 5 spd could take it??? SMac what do u think?

Poster Thread
stirlingmac
Posted: 2003/3/2 22:42  Updated: 2003/3/2 22:42
Home away from home
Joined: 2000/5/6
From: Wellington New Zealand
Posts: 962
 Re: Lightened Flywheel
I would'nt think an upsize in clutches is neccessary. Even the big (1500 +)A series engines we race use EXA Turbo pressure plates and clutches. I intended to get a photo of the latest flywheel I have made but its already been collected and bolted in to the car. I am interested to see how it performs as it's the first one I've done without a steel insert in it for the clutch face. I have been assured that the alloy is tough as and can handle it. I would'nt reccommend it for street though. This one is for circuit work. The same car has an adjustable cam pulley and now I've got to modify a front housing for it. If I'm successful I'll do a few to sell as I think there's a few guys out there who would want one.

Poster Thread
D
Posted: 2003/4/28 16:42  Updated: 2003/4/28 16:42
No life (a.k.a. DattoMaster)
Joined: 2002/10/28
From: on my stationary Earth @ 0 km/h
Posts: 10844
 Re: Lightened Flywheel
Smac any news on that flywheel you did??

Also how can you tell if my flywheel is steel rather than cast? If I follow your drawing on my flywheel do I need to rebalance the whole engine??

Poster Thread
stirlingmac
Posted: 2003/4/28 19:08  Updated: 2003/4/28 19:08
Home away from home
Joined: 2000/5/6
From: Wellington New Zealand
Posts: 962
 Re: Lightened Flywheel
The engine is back in the car and is close to being fired up, I will let you know how the flywheel holds up. As to identifying what your flywheel is made of, I had a think about this and couldn't come up with a simple solution!! I just look at them and know. If its cast iron when it's machined or drilled its swarf is a powdery silver whereas steel is more likely to to have bigger pieces of swarf. If your engine is apart it would pay to balance the whole lot , but doing just the flywheel won't create any dramas.

Poster Thread
D
Posted: 2003/4/29 11:29  Updated: 2003/4/29 11:29
No life (a.k.a. DattoMaster)
Joined: 2002/10/28
From: on my stationary Earth @ 0 km/h
Posts: 10844
 Re: Lightened Flywheel
Thanks Smac its good to have someone who we apprentices can pick brain on.
Steve Newing from speed technology had a cro mo one made up 11 years ago for the 1200 and never had a problem. He witnesed other alloy billet ones wearing on the bolt holes thats why he went cromo. Hope yours has no probs and you get your reward.
Since your an engineer (here goes like a question to a doctor outside work hours;)
Have you ever looked at rotary side housings and intermediate housings which are made of cast iron? You see I would like to know how possible it would be to get billet ones made up of the material you are using and then plasma sprayed. They are available at race beat in the states and cost 8500 au for the three just to save 30kgs. however a bare standard 13b weighs 175lbs and minus 70lbs is about 100lbs which suits aircraft builders to a T. However there would be a market for these as rotaries are exponentially used in light aircraft if someone could make them cheaper. Sorry to discuss Maz stuff guys Im still enticed of a lightweight rotary in a lightweight datsun.
Here are the RB ones:
http://www.racingbeat.com/FRmazda1.htm

Poster Thread
stirlingmac
Posted: 2003/4/29 11:58  Updated: 2003/4/29 11:58
Home away from home
Joined: 2000/5/6
From: Wellington New Zealand
Posts: 962
 Re: Lightened Flywheel
I am aware of the hole wearing problems with Alloy flywheels. If it becomes apparent I can either dowel the crank flange orfit some top hat bushes to the bolt holes. AS for the alloy rotor housings I know some one over here who has some in their car but painted them so no one knows !! Casting the alloy housings is the easy part , it is the plasma spraying that costs. The problem with rotarys is they are relatively heavy for their size. In the 80's Mazdaspeed produced lightweight titanium rotors and sold them to select clients. The rest of us had to machine the standard parts. I made a hollow 2 peice eccentric shaft for my PP 12A in my race car, the theory was it could rev faster and the rotors have the corners machined and the centre lightened as well. Billet alloy side housings are entirely possible but the material cost is high.. the 5000 series alloy for the flywheel was around $500.00 for 25m thick so you would be over $1000.00 just for the alloy. I hope that industry adopts plasma spraying for more products to bring it's costs down, because I beleive it is very expensive. I know a guy here in Wellington who runs a 12A in a home built plane. I made him a flywheel for it 20 yrs ago when I was an apprentice !

Poster Thread
D
Posted: 2003/4/29 13:32  Updated: 2003/4/29 13:32
No life (a.k.a. DattoMaster)
Joined: 2002/10/28
From: on my stationary Earth @ 0 km/h
Posts: 10844
 Re: Lightened Flywheel
titanium rotaries now that is a trip, yet I wonder how they stopped them from oxidising?
You must really love your job and your country you lucky man. One day Ill migrate there with all those unwanted rare import jap cars you find in many places.
Only problem though is the food. Its almost the same as the english menu. I wont say any further but you never find english restaurants competing with Alaskan ones or you are most likely able to find a h165 lsd in a swap meet than an english restaurant or.... better stop there.

Poster Thread
kegs
Posted: 2007/9/23 12:45  Updated: 2007/9/23 12:45
No life (a.k.a. DattoMaster)
Joined: 2003/1/5
From: campbelltown (sydney) australia
Posts: 1802
 Re: Lightened Flywheel
hi guys does anyone have this sort of diagram for a ca18det flywheel, i am in the process of replacing my clutch in my ute and cant see the point of putting the flywheel back in without lightening it, can i just apply the same principals to the ca one as this diagram?

Poster Thread
cfwase
Posted: 2003/2/26 3:54  Updated: 2003/2/26 3:54
Home away from home
Joined: 2002/6/17
From: auckland, new Zealand
Posts: 154
 Re: Lightened Flywheel
can you just use the standard A12 flywheel with an A15 engine and its like having a lightened one?

Poster Thread
stirlingmac
Posted: 2003/2/26 5:16  Updated: 2003/2/26 5:16
Home away from home
Joined: 2000/5/6
From: Wellington New Zealand
Posts: 962
 Re: Lightened Flywheel
You can do that , I know guys who have done it but I'm not sure if it really the right thing to do. I would assume the factory balance tolerances would'nt have changed much. i meant to add to the photo details that the Nismo light flywheel weighed 6.4 Kg, compared to a standard one at 9.7KG. I have just finished an alloy one that weighs 3 Kg. But it has an alloy undersize front pulley as well and the rotating assembly requires rebalancing.