Help identifying this 2T-G flywheel

[sillycar chick]

This is a flywheel out of a 1974 TA22 celica. My parents bought the car in 1976, and the previous owner had done a fair bit of work to it, including a heavily modified "hyrbid" engine, which was a 3T bottom end and a 2T-G head which had been ported and polished, and high-lift cams.

Anyway here are some pics of this flywheel. It is extremely light, you can just about pick the thing up with your pinky finger (well not quite for me, but my dad can easily ). Its had about 8 years of driving, as the car has been off the road since I was born.




Anyway, does anyone know any information about it, like was it brought out in racing celicas? Because it doesnt really look like someone has had it lightened by a machine shop.

[Screamn_Sleeka]

3T Engines didnt exist in 1976.
So it shouldnt be a 3T flywheel, but neither should the crank?

[sillycar chick]

The engine had 3T stamped on the block when it was purchased in 1976. My dad didnt know much about these engines at this time, but I have since educated him. He had always thought, being a twin cam, it was a "3T-G". Besides, a 3T was more likely available overseas in other cars in the 70s, as it wasnt brought out in australia until the T18 era i think. Whoever owned this car from new knew what he was doing, as the engine was heavily modified including ported and polished head, high lift cams etc (as so was later found out when it was stripped down).

[merc-blue]

Thats a very custom version of the lightweight forged racing flywheels that were avaliable aftermarket in the day,
wouldnt be using it in anything but a race car as a flywheel that light will decrease driaveility,

[sillycar chick]

wouldnt be using it in anything but a race car as a flywheel that light will decrease driaveility,

Why do you say that? The flywheel was in the TA22 for 8 years and my mum drove it around daily with no problems, and used the clutch fine. All they did was used a heavy duty clutch... no problems.
Its going in mine soon along with some other mods so ill tell you then how it is on the street

[GeneSPIDA]

Flywheels are in engines to "smooth an engine from its individual power pulses". Basically, the flywheel makes the engine "feel smoother" as a large spinning mass of weight to fill-in the dead periods where no cylinder is producing power using it's inertia.

So, a lightened one is good for allowing the engine to accelerate/decelerate quickly. But it will make the engine less smooth - especially at idle. So, if it's extremely lightened, then it's likely to be quite a "rough" engine at idle.

[sillycar chick]

That makes a lot of sense, as dad said it was kinda "lumpy" on idle... the engine had suspected lumpy cams also... which I have just managed to get hold of also
Thanks for the info

[infotechplus]

That's one seriously lightened flywheel.

Can you weigh it and tell us (kitchen scales should do the job)?

I know in my Honda EG6 race car it revs out to 9500 RPM easily with its race lightened flywheel but it still idles pretty much as normal.

Good luck to you - it should provide excellent acceleration.

What about trying someone at TRD in Japan or USA. They might be able to tell you.

Peter

[ta22gt]

Flywheels are in engines to "smooth an engine from its individual power pulses". Basically, the flywheel makes the engine "feel smoother" as a large spinning mass of weight to fill-in the dead periods where no cylinder is producing power using it's inertia.

So, a lightened one is good for allowing the engine to accelerate/decelerate quickly. But it will make the engine less smooth - especially at idle. So, if it's extremely lightened, then it's likely to be quite a "rough" engine at idle.

I know this is generally the case bit i can vouch for the rule being untrue or at least not in my case.I have a billet flywheel for my 18rg which weighs 4.2kgs


Now this engine is 2.2L has 400" lift cams heaps of head work twin 48s etc and will idle smoothly at 800-1000 rpm.It just depends as there is always an exception to every rule

[GeneSPIDA]

The rule isn't untrue. It's all relative remember. If you put a lightened flywheel in, it will be less smooth at idle than the heavier item. It's the laws of physics and momentum.

But whether it's too rough, depends...

Sometimes it's personal perception as to what's acceptable.

Otherwise, why bother putting a flywheel in at all? It's just dead weight otherwise.

[merc-blue]

There are alot of other factors involved,
But the car will be more sensitive to change in RPM, its pure physics the exact reason it will rev up quicker, somthing
acceleration will be less smooth also when you come off the throttle (like when you drive a big truck and back off the throttle quick, not so much casue the flywheel is light but becasue the drivetrain is heavy)

[sillycar chick]

That's one seriously lightened flywheel.

Can you weigh it and tell us (kitchen scales should do the job)?

Hehehe Yeah, its a nice flywheel, im stoked after years of begging that dad has finally handed it over for some fun

You will have to bear with me, as Im back home now and not sure when i'll be out at dads again to weigh it (dont even know if he has scales ) but I will get around to it as I was interested to know myself.

When the thing was in my parents 22 it was driveable enough as it was mum's daily. Dad was telling me earlier as long as the idle was set at no less than 1000rpm the thing was fine, anything less and it got really rough. My hybrid is currently at 1000rpm anyway, so it should be all sweet.

Cant wait to get this thing in my car!

[psychofox]

It looks like a TODA flywheel. Here's the link for the TODA 2T-G flywheel. It's 3.5Kg

http://www.toda-racing.co.jp/en/prod...wheel/2tg.html

[sillycar chick]

WOW! I think you're on the money there Would they have been making those flywheels around 1974-1976? Because that's how old this thing is.

Very nice find, well done

[GasedT18]

sillycar chick,

that is one very impressive flywheel - good score! And so I learn that the PCD for the 2T-G crank is the same as the 3T-xxx.

What is the diameter of the friction surface?

I'd feel safer, from what I've read, if I had a scatter guard fitted to the bellhousing if I had such a flywheel & if going to be doing serious revs.

D