hey everyone it's chris and jamie from steeda today we're going to show you ultimately what
a dyno is and what to expect if you're taking your mustang to a dyno day with your local club
jamie can you tell us what a dyno is just very top level it's just a mechanical way to determine how
much power your car makes it's uh uses the roller and how fast you can spin that roller up with your
car basically determines how much power it makes exactly so this will equate pound feet of torque
from the rear wheels of your mustang and then ultimately an equation of horsepower as well yep
so jamie tell us a little bit about how they strap the car down how they cool the car while
it's doing the pull you know how they get rpm off of the engine things like that well we use
ratchet straps that are have a high enough rating to you know keep your car secure we use four tie
downs on mustangs tie the rear control arms or the rear axle housing depending on if your car
is an independent rear suspension or a live axle car cross them in the back so the car doesn't
try to move side to side we use wheel chocks as well just to keep the car nice and stable
cooling fans are absolutely necessary because the cooling fan on your car does not have the capacity
to cool with the car sitting stationary when you are making a full power full load pull on the dyno
you also have an inductive pickup that attaches to one of your coils to supply an rpm signal to the
dyno computer that way it can calculate what the horsepower and torque are at any given rpm and
when they're actually doing the pull in most cases they will try to do the pull in the one-to-one
gear that way they're getting the exact horsepower rating without a multiplier from the transmission
um jamie can you tell us a little bit about uh the controller and how they would actually break the
car when they're done making the pull the the dyno drum the roller itself has built-in air brakes
that will stop the roller from turning that way you're not having to use the car's brakes to try
to slow down the roller uh it'll burn your back brakes off your car in a very short order trying
to do that so they have air brakes brake shoes plies breaks the drum slows it down and stops it
before we dive into exactly how to read the dyno graph jamie can you tell us what
mustang owners need to be aware of before they go to a dyno day to make sure that their car is
ready to go yeah they just need to make sure that they've checked all the check the condition of
the of your car make sure that your oil level is topped off and in good condition that your
coolant level is topped off that you have set your tire pressures uh according to the tires
themselves and that they're both even left to right and that you have torqued your lug nuts
it would be a real shame to have a tire explode on the dyno or come off on the dyno because
you didn't check something you don't want to be one of those viral videos so
that's why we're doing this video to prevent that from happening with that said jamie i guess
this is a great great overview of what to expect when they strap your car down to the dyno getting
ready we're going to show you now how to go over the diner sheet and exactly how to read it
so a lot of speed shops if they have a dyno and that's for you running um they may have a tv or
a computer pointed towards the dyno and this is what you're gonna see jamie why don't you go over
exactly what's in this layout of this dashboard well this is basically your your
dyno run screen that's going to give you your engine rpm the mile per hour of the dyno roller
uh gives you your other options that'll tell you what the ambient temperature of the dyno room is
we also have a boost reference gauge to be able to see what the manifold pressure is on
boosted application cars whether it's turbo or supercharged other options include wide bands
so you can actually cars that if you're tuning with the dyno you can tell what your air
fuel ratio is but this is the basic screen basic information that you're going to see
while the car is actually being while the car is actually making a dyno pull
now moving over to the dyno graph most dyno graphs especially for dynojets are going to look very
similar you're going to have a horsepower curve and a torque curve correction factor
do you mind explaining exactly what that is jamie the correction factor is just so you can even out
different areas of the country to all basically come up with the same dyno reading it's a
calculation to determine uh or it's a calculation to even out temperature altitude humidity
barometric pressure those kind of things so if you dyno your car in south florida you should roughly
have the same reading as you do in denver exactly so typically uh most most correction factors
i should say most people use the sae correction factor std is also common one that's seen
we like to use sae here so right now we're looking at a dyno graph from a 2019 gt 391 peak horsepower
374 pound-feet of torque jamie can you show us how to read peak horsepower and exactly where that is
the same with peak torque well first you have to follow which one of the lines is horsepower and
torque over on the left of the screen you'll see that it has horsepower and this line is
your horsepower over here you have your torque and foot pounds and this line is your torque
it's all done incrementally in engine rpm so that you know at any given rpm what your horsepower and
torque is this one's its maximum torque or maximum horsepower was at 6000 rpm so at 6000 rpm you can
see that where your horsepower is compared to your horsepower scale over to the left your peak torque
which is at 46.90 you can find where 4690 is on your engine rpm scale go over to your torque scale
and see where the maximum number comes out over here that about wraps things up i mean this is
really good top level overview of what to expect when you go to a dyno day how they're going to
strap your car down what the dyno operator is going to be doing in terms of making the pull
what gear they're going to be in things like that and ultimately the best part how to read
the dyno sheet and how much horsepower your car makes so if you have any questions please
comment below let us know your thoughts and if you do have any questions we're happy to answer
them what kind of horsepower does your mustang or ford make we want to know hit that like and
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