rev up your engines today I'm gonna talk about illegal modifications to your car that
can make it run faster people have always been modifying their cars some of
these modifications are legal in some state illlegal and others now the first
modification has to do with removing mufflers from a car now when your
engine is running it burns gasoline the exhaust comes out the exhaust manifold
goes down the pipes the back of the car then it passes through the catalytic
converter where unburned hydrocarbons are burned then it goes further down
through the muffler in a my own celica there's the muffler here it's right in
the back that's the original muffler this guy do it's amazing now like most
car parts the muffler is named for what it does it muffles sounds loud noise of
the engine explosions gross through various baffles that it hits which
quiets it down then it comes out the back but mufflers besides muffling
sound they also create some back pressure some resistance to your exhaust
gas freely flowing out to your engine can breathe in and breathe out as fast
as possible realize that basically your cars engines giant air pump it's sucking
as much air as you can and it's pumping the burned gases out as fast as it can
to be more efficient to run faster and to just work better to some extent a
muffler does reduce the power of your vehicle that's why you don't see
mufflers on race cars and of course it's why race cars make so much noise now it
used to be in all the piston airplanes they didn't have mufflers either that's
why when you hear them flying all around you're gonna hear them well in Europe
now they've made very stringent noise regulations for small airplanes of
propellers and even they are starting to have small mufflers that have less
baffles on them they reduce the noise a little but they also reduce the power so
if you remove the muffler you will have a free-flowing engine exhaust which
means it can suck air and better burn it and throw the waste gas out as
efficiently as possible but in doing so you're often breaking the law
but the law is different in all states for example in California a vehicle
can't make more than 95 decibels in New York State the limit is 15 decibels you
just get up louder card California legally then you can't a New York State
well here in Texas there is no actual decibel limit it just says that your
vehicle can't make excessive or unusual noises these things kind of open their
what is excessive and certainly what is unusual I guess you can't have a car
that honks like a goose but that's leaves a lot of parameters I hear a lot
of loud cars around here nobody seems to bother them and lately I've seen a lot
of really loud Ferraris and Porsches in my
neighborhood as it's becoming yuppified a lot of them backfire because they
don't have them tuned up right and they rev them up high and they're shifting
and they back for a car should not backfire if you do take your muffler off
of your vehicle you gotta make sure that thing is tuned up and running perfectly
set perfectly because if it is you're gonna get a bunch of backfires the
muffler will also slow down some backfire I mean if you got a big gas
leak inside the fuel injectors and it's dumping raw fuel in the exhaust it's
gonna backfire that too but a normally running engine if it isn't perfectly
sawed off without a muffler they do have a tendency to backfire more so if you
just remove a muffler and your car isn't set up right for that flow it may not
run right and of course since it's illegal in most places because of the
noise that's gonna make they're all gonna make too much noise on a regular
gasoline engine they make a lot of noise if you take the muffler off your whole
systems based on oxygen sensors catalytic converters and if you remove
the muffler then you're gonna have a higher flow and that can often mess with
the software and the readings from the oxygen sensors and the working of a
catalytic converter because the catalytic converter actually has to
store little actions and inside to burn the hydrocarbons and if it's flowing too
fast it can't store anything and it won't work right so then you'd be
breaking the pollution laws now I've had people in the past say hey Scotty
you got to have a muffler on your car cause you need that back pressure well
if you're driving a four-stroke engine that's not true you don't need any
backpressure they're not made to need back pressure but speaking of that back
in the past when I was a young mechanic there were a lot of two-stroke
motorcycles and even two-stroke cars like the Saab Sonett that was a bizarre
v4 two-stroke engine that the Swedes make now because of the difference in a
two-stroke engine versus a four-stroke the two-stroke engines really need a
certain type of pressure in their exhaust system in the motorcycles they
call them expansion chambers if you look at one of those old 60s or early 70s
two-stroke motorcycles you see they had these big expansion chambers on the
exhaust that was so that they would create a certain amount of pressure so
the true stroke engine could run right because two-stroke engines are
completely different they don't have the four-stroke of the intake compression
ignition exhaust they're just two and there gas mingles in the engine as it runs
that's one reason they pollute a lot more but with those you take off the
exhaust system of a two-stroke motorcycle engine it'll look like crap
but that has absolutely no bearing on a four-stroke modern car take off the
muffler yep you can make it go faster to tune it up right but you will be
breaking all kinds of laws and here in the United States especially you'd be
breaking federal pollution laws because if you did it and someone tested it on a
machine they'd probably find out that's putting out more pollution than it
should because getting rid of that back pressure change tile the anti-pollution
system works oh not another way legal and illegal at the same time using
nitrous oxide to boost the power of an engine there's all kinds of nitrous
setups there's wet ones where it comes in wet mixed with the fuel there's dry
ones where it comes in by itself but basically they're all made to boost the
power of your engine you can make a little bitty force own around you put
out 40 50 more horsepower you get a barrel v8 engine you can end up adding
hundreds of horsepower to it their legality is kind of in no-man's land
pending upon where you live I got friends in Australia they said New South
Wales it's totally illegal you can't have a nitrous oxide system on your car
for street driving we're in Great Britain there's no
restriction on using these nitrous oxide systems other than you have to tell your
insurance company they're gonna copped your insurance rates cuz I know
you're making it a faster car we're in South Carolina in the United States you
can legally have a nitrous oxide system on your vehicle but you can't have the
tank opened to use the system while you're driving on the street they have
it so you can have it on your car then you can take your car to a racetrack and
do it or go on a dirt road and do it but on legal streets that you're driving you
can't have the tank open since the tanks closed it doesn't put any boost you're
not boosting anything which of course leads to guys hiding tanks and hiding
the whole system so nobody can see it but in the state of Nebraska it's
completely legal you can have it on a street car and if you get pulled over
for speeding you'll get a speeding ticket but they will not give you an
extra ticket for having a nitrous oxide system hooked up to the car I mean
niacin oxide works it uses an oxidizer and rocket engine so I mean this stuff
does work of course there's only a limited amount you're gonna have it
doesn't last all that long but when you open it up and inject it into the system
roof now of course an alarm runner will have detrimental effects on your engine
we're not was young a lot of guys put them in and they were always blowing
their engines they'd blow a head gasket sometimes they'd even blow the heads
each engine is designed to accept a certain amount of power and if you go
over that limit it will blow up that's just the way that it goes no the last
modifications I'm gonna talk about can be illegal but they can really make your
vehicle go faster is the use of larger higher flowing fuel injectors on your
engine the fuel injectors on your car the floor here they're designed to get
the maximum amount of both fuel economy and power for certain sized engine so if
you put in fuel injectors and have a higher flow rate now you'll probably
have to put a bigger fuel pump on a two to pump the extra fuel you can get more
fuel into the engine quicker and it can increase the power that it puts out now
the main reason that this would be illegal is because it's drastically
gonna change the pollution coming out the tailpipe unless you had a complete
pro who knew how to reprogram your computer and set it up so that it wasn't
polluting more if you put bigger injectors on and set the car up to run
with those bigger injectors and of course you get it worst gas mileage as
you pump in more fuel but if you really wanted to do something
like that they make various injectors for various cars and you would have to
have to find a mechanic or if you're a real computer whiz and knew how to program
computers and understand air/fuel ratios you could try to reprogram your computer
so that would accept these new injectors now if you've got a common car out there
like a Mustang or a Camaro Dodge Charger there's lots of guys that do that kind
of stuff you can go on the internet you can see their advice tell you what to do
and I know with my old Triumph motorcycle it's fuel-injected too there's a British
website that the guy gives away all the information free you just took up the
scan tool he gives you the information of how you should reprogram certain
aspects of the computer software to make those bigger injectors work and away you
go there's a lot of guys out there that are into speed loves sharing their
information with everyone else but then again realize these guys are going for
speed a lot of times you do something like that it's not gonna pass any
pollution tests for example on my trying motorcycle here in Texas they don't test
motorcycles for pollution when they're inspected each year so it's not like you
got to worry that it's going to make an emissions test because they don't
emission test motorcycles here in Texas so ultimately if you're gonna do any of
these modifications you want to check with your local laws and see how things
work in your area but if you find that a certain thing is legal in your area or
it's not illegal go ahead just realize as the saying goes speed is just a
question of money how fast do you want to go, so if you never want to miss
another one of my new car repair videos remember to ring that Bell