hello everyone and welcome to this
week's video today I'm going to be
talking about performance clutches now
if you haven't already watched my video
on clutches you may want to check that
out first
that said it never hurts to see the real
thing so I'm going to kind of review in
this video and talk about how a clutch
works as well so just kind of get your
bearings we've got the engine engines
connected ultimately to the crankshaft
which is connected to the flywheel and
connected to that flywheel we have the
pressure plate inside of the pressure
plate diaphragm spring and then the
clutch disc here so that's what we got
drawn here and an oversimplified a
clutch pedal and then the throw out
bearing which presses on the diaphragm
spring so let's take a look at an actual
clutch so here we have a única
performance clutch for the Acura Integra
B series motors and I've got a product
link in the description if you like
check that out so anyways what we've got
here is this is the pressure plate the
red painted pressure plate in the center
we've got the diaphragm spring so this
is what you press on to release the
clutch and this is the bearing that
presses on that so this is throwout
bearing and basically it can absorb a
thrust load and rotate like this and
then it will press on here in order to
release that pressure plate from the
clutch disks so inside you can see
here's a wire ring in the inside and
that's basically the fulcrum of this
diaphragm spring so as you press in it
lifts this pressure plate back and
removes it off of the clutch disc so
this will be these holes here basically
where this is going to connect to the
flywheel and then inside here you'll
have the clutch disc and that's what
this will ultimately be pressing up
against and pressing this against the
flywheel in order to transfer torque so
there's really three main differences
between a typical om style clutch versus
a performance clutch one of the first
things that's going to change is the
clamping force so the clamping force of
this diaphragm spring is going to be
much greater on a performance clutch in
order to transfer more torque so if you
haven't watched my video on multi-plate
clutches I kind of explain how you can
calculate the amount of torque that a
clutch can pass through the transmission
so you may want to check that out but
basically this has
as a 1800 pound pressure plate that's
about 45% more clamping force than the
OEM style clutch so that's going to give
you about 45% more torque that you can
transfer through it the second thing
that a performance clutch is going to
have different from an OEM style clutch
is the material of the disc so this
particular clutch this Janaka
performance clutch disc uses a copper
ceramic material rather than an organic
material like most typical clutches and
basically the reason you're going to use
a copper ceramic is that it can absorb a
good amount more heat it maintains its
performance at higher temperatures than
a typical clutch or an organic type
clutch so you can kind of beat it up a
little bit more you can you know I've
used it on a track and it's still going
to work unlike an OEM where it might
kind of start to disintegrate once it
starts to get warmer and the final thing
you're going to look at on a performance
clutch is it's going to reduce the
surface area of the disc so you'll see
here that it's got these pucks six of
these pucks and different styles will
have a different amount but basically
what you're doing is the clamping force
will remain the same on this however the
amount of pressure on each individual
puck will increase so kind of just some
rough math here I just kind of said that
these were about two square inches and
this is about a square inch here so
overall we've got about eighteen square
inches of area of if this were to be a
full circle clutch disc so we've got a
pressure of eighteen hundred pound force
divided by eighteen that's our area and
that will give us pressure so that gives
us a hundred psi which would be
distributed if it were a full circle now
because they took out these little
notches I'm just going to call that one
square inch so then we've got two square
inches for each one of these so we've
got twelve square inches 1800 pound
force divided by the twelve square
inches and that gives us 150 psi so
simply by taking out these little
sections we've increased the pressure on
each one of these pucks by 50% now why
would you want to do that well the
reason you want to do that is some
materials need a great
your psi in order to not slip so for
example this copper ceramic needs a
greater pressure on it so that it
doesn't slip when you press on the
throttle really hard you've got large
torque going through it so that's why
you're going to see these pucked
designs so one of the things basically
this yanaka performance clutch is rated
to about 300 pound feet of torque and
also it's good for about 400 horsepower
now when you do replace a typical clutch
with one like this a performance clutch
you will notice that the engagement is a
little more harsh especially if you're
not matching the revs if you're matching
the revs it should be perfect but if
you're not then you're going to kind of
notice it a little bit more also you may
notice some chatter at lower rpm so when
you're at lower rpms and you're first
starting in first gear the car may
vibrate a little bit so you're going to
kind of want to do that a little more
smoother and kind of have a little bit
higher rpms for things like that and
also there's a 300 to about 500 mile
break in so you're not really going to
want to go all out on that performance
clutch like this until you've really
broken it in well and then the materials
kind of set and you get that maximum
clamping force so thanks for watching
feel free to check out the links to the
unica product in the description below
and feel free to leave any comments or
questions you have thanks