Res said:
i know like me alot of people on here are pretty broke most of the time and labour is a beach
so diying is a great way to save some money and get some experience
I think this is an interesting thread I DIY a lot of components for myself for my own race car and a few other track cars
mainly older stuff
apart from a engine rebuild I have to do for my 1979 sigma IPRA track car, my new project I plan on is a CC lancer coupe with a 4G61T to run in the super sprint series here in Vic
I already have the engine and that will be the start of the project, I have still got to pick up a shell but the body work and roll cage are the quick bits to do
anyway if anyones interested I'll post up from time to time on progress
I took a few pics of the last flywheel I made and I thought I would run you through the job ( this fly wheel was going on a VR4 turbo thing into a RWD )
as I have to make a flywheel for a mates track car a CE lancer
got me thinking it maybe a good post to see how a one off billit flywheel is done and yes its done at home in the shed I have a few tools
at home
first thumb - a basic chunk of 4140 steel with a new ring gear
not that interesting but it what I start with
again not that interesting but again the start of the machining
this thumb is starting to look like a flywheel - with the counter bore for the crank mounting
and the ring gear mounts machined ready to turn around and machine the front face
front face machined with the face counter bored and tapered for the bolt heads
the outside dia is also finished - time to turn it to the back again
material is carved out of the back to reduce weight - I weighed it at this stage and it went
4.75 Kg ( 10 1/2 pound ) of cause there is another 1 Kg in the ring gear ( 2.2 pound ) still to be fitted
next part of the job is on the mill - so as you can see I run a cutter from the outside edge to where the fiction plate surface finishes these 12 cuts remove about .7 Kg ( 1 1/2 pound )
from the out side edge
the last jobs to do are drill and tap to bolt up the presure plate with of cause the dowels
fit the ring gear and have it balanced
after milling the outside edge the flywheel is set up on a rotary table and drilled and tapped for the presure plate bolts and drilled for the dowels
finished flywheel back from the balancers
being fully machined there is not a lot of out of balance 3 small holes around edge
total weight 5.06 Kg ( 11.14 Lbs ) that include the presure plate bolts
and with the weight removed from the outter edge they even feel like they are lighter
to drive
by the way my sigma runs a lighter flywheel its a bit over 4 Kg and runs a 7 1/4" tilton race clutch they are only 2 1/2 Kg
I love DIY
Cheater