Lightened Flywheel Thread

[kingmick]

would still be great fun with 240hp! nice and light

[sillycar chick]

Im dragging up an old thread. Im suprised I havent found this before.

I have a 2TG/3T hybrid in my TA22. When I put it in my car I used a 3T flywheel, which I have been told is about 12kgs. Apparantly I made the mistake of using a 3T flywheel, when I should have used a 2TG flywheel at around 8kgs.

but... Good news everybody! Dad has given me his flywheel that's been in storage, its from my mum's TA22 - it has been identified to be a TODA racing 2TG flywheel, so its about 3-4kgs




Would it be ok to use just a PBR heavy duty clutch? Dad said he was using a heavy duty clutch in mum's car when the flywheel was installed and it was ok. Or do I need to go for a better clutch? Will be mainly street use, till I get a few other things sorted and get the car into hillclimbs/other events. And yes, Im happy to drive the car on a daily basis even with a tricky clutch pedal

[Rodger]

Dana,

It maybe wise to use a heavy duty clutch that does not unduly increase the pedal effort, as with this flywheel you may find the motor has to be clutched a lot and will not be very street drivable.

As the flywheel is so light you will need to be careful driving on the street because if the engine coughs or splutters or dips as the clutch grabs it will definately stall and will leave you stranded in the middle of the intersections.

It will also be wise to dowel the flywheel to the crank to save having to go through the pain I have, Shelldrake has and many others have of loosening flywheel bolts. It will be more critical with this flywheel as the rapid changes in speed will shake them loose quicker.

http://toymods.net/forums/showthread.php?t=23385&page=2

Now if I have not scared you out of this flywheel it will be a very nice flywheel for competition especially when combined with cams and good induction as it will rev very well.

Regards

Rodger

[takai]

Make sure that the clutch plate is bonded as well as rivetted. The rapid changes in directional force on the clutch plate can quite easily break the rivets through the friction material. Which just results in a friction plate floating around between the metal backing and your flywheel.

That said im not sure what sort of revs your 2/3TG hybrid will be seeing, but mine spat into 4 pieces at 9000rpm.

[oldcorollas]

PBR/RPM are cheap... if you can jump in someone elses car and feel the pedal pressure, do that.. sucks to have a heavy clutch.

if you decide later that you need something beefier, you always can...

that flywheeel looks like it was used with a 3 puck button clutch, hence the hotspots...

[Sam_Q]

does anyone here have pictures of flywheels they have lightened themself? I am thinking of doing mine

[Rodger]

I'll take a picture of the rest of my flywheel Sam. I will try to show what was machined out at the back of it. It is on the motor. If Joey has not installed the flywheel he has then perhaps he can post up a pic.

Regards

[Kyosho]

I'd be skipping the heavy duty clutch.
I found mine not too bad in my commodore, but it was "heavyish" (Clutch cable)
It also "bit" fairly savagely with absolute no pedal feel.

Now I have a lightened flywheel (5.5KG Chrome Moly) with a twin plate button clutch in my R33, and it's beautiful to drive on the road, very easy to take off with. Just takes about 2 takeoffs to get perfectly used to, if I've been driving my ute around heaps.

And yes, you can slip a button clutch.

[love ke70]

twin plate ftw
bit exxy tho...

[Rodger]

Pictures as promised. Gives everyone an idea what I have had done to my stock 2T flywheel. Cannot get an overall shot as it is now on the motor.

However it shows material removed from the back and down from the ring gear to the clutch cover mounting diameter. Weight is around 7.6kg







Regards

Rodger

[Sam_Q]

yeah thanks for that, I get the idea of what you have done. I am planning on the same for my sprinter one


BTW looks like you own a nice camera to take pics like that

[Rodger]

A Konica Dimage fake SLR type. It can take good pictures. Plus I took about a dozen shots, gotta love digital cameras.

[sillycar chick]

Just found this article from Puma Racing. Ive read a lot of their stuff about compression ratios etc when I was building my engine and found their theories quite interesting. This one’s about flywheels, and thought it was appropriate to add into this thread.

http://www.pumaracing.co.uk/FLYWHEEL.htm

Rodger mentioned that removing 1kg effectively from a flywheel is equivalent to removing approx 15kg body mass. Puma seem to go into it in a bit more detail and explain why.

They also explain that lightening flywheels in smaller cars with smaller engines that rev higher is far more effective than lightening a flywheel in a heavy car with a big low revving engine.

So by the sounds of it, 51LII would really benefit, especially in 1st and 2nd gear acceleration, from using the TODA flywheel, basically because it’s a smaller car with a smaller, higher revving engine. Heavier cars with lower revs would probably be better with more weight in the flywheel.

Interesting stuff…. Cant wait to get that flywheel in my car.......

Provided everything goes well....

[love ke70]

thats gonna be a very lightflywheel
i would hope your using a nice clutch?

[Sam_Q]

I think I might make myself a lightweight crank pulley for my 20v, doesnt matter which end the weights removed from right?