| Diesel tuning is more important than we
| |
| | too little is low power with absolutely
|
| think. Lets get down to the basics.
| |
| | NO smoke and just right is in the middle
|
| Diesel is distilled crude oil
| |
| | of smoke and no smoke! There are a few
|
| (Distillate). Unlike what most
| |
| | more complex settings on the pump that
|
| 'Hollywood' movies promote of a diesel
| |
| | are checked and adjusted but these are
|
| truck hitting a wall and exploding like a
| |
| | the main ones.
|
| small nuclear bomb, oil does not readily
| |
| | Well, there are 6 injectors supplying
|
| ignite, particularly a liquid form. If we
| |
| | fuel to the engine (Imagining it being a
|
| atomise it though, it will burn readily.
| |
| | 6 cylinder diesel). Looks like it has no
|
| The diesel principle relies on air being
| |
| | problems getting fuel, but what about the
|
| compressed to approx. 500PSI. This in
| |
| | important part that we forgot about, AIR?
|
| turn heats the air, turning it into the
| |
| | Well...it has to draw the air through a
|
| igniter (diesels don't have igniters such
| |
| | maze. Filter, pipes, inlet manifold and a
|
| as spark plugs). Heard of a glow plug?
| |
| | tiny inlet valve. This has to happen in a
|
| Glow plug only glow on cold start-up to
| |
| | split second and the piston going down
|
| help warm up the air in the combustion
| |
| | has to do all the sucking. That's the
|
| chamber. A bit like when you are pumping
| |
| | governing part of a diesel engines
|
| up a push bike tyre, the pump gets warm.
| |
| | performance. Remember more fuel for more
|
| Ok, so you now have very hot air and you
| |
| | power is just more smoke! So we have to
|
| inject diesel in through an atomising
| |
| | do something about the air to keep things
|
| injector. As soon as the diesel leaves
| |
| | clean. This is where a Turbo system comes
|
| the injector and enters the extremely hot
| |
| | into its' own with Diesel engines. With a
|
| air the diesel ignites and combustion
| |
| | huge amount of air now available due to
|
| begins. Put a poor atomising injector in
| |
| | the turbo supplying air right to the
|
| the picture and you have a different
| |
| | inlet valve, the piston only has to suck
|
| story. Because it is not atomising the
| |
| | air from there. Lets not forget that 1
|
| diesel enough, the fuel volume burns
| |
| | cylinder has a suction stroke many times
|
| erratically and slowly as the flame burns
| |
| | a second, so these fallacies of air being
|
| through the large droplets of oily fuel.
| |
| | forced into the engine and blowing heads
|
| If you were to light up a drum of oil,
| |
| | off with a turbo are only that! Now that
|
| you would see a similar effect of slow
| |
| | we have more air, the fuel system can be
|
| burning and smoke. You can imagine that
| |
| | set up according for more power.
|
| by now the timing of the combustion
| |
| | [WARNING- This is where the whole
|
| process is also upset. Add lower injector
| |
| | equation can come adrift with overheating
|
| pressure than normal, due to age, and you
| |
| | etc. Things have to be set up by a
|
| have the timing of the fuel ignition
| |
| | professional and a professional that
|
| point changing even more (injector
| |
| | knows his JOB!]
|
| opening too early). The injectors doing
| |
| | One last note; the diesel system that is
|
| this alone can make a diesel smoky and
| |
| | on all 4WD diesels was designed to run on
|
| sluggish. On a cold morning, the
| |
| | a fuel with certain burning
|
| combustion is even further retarded due
| |
| | characteristics. We don't seem to be
|
| to cold cylinders and cool combustion and
| |
| | getting fuel in Australia meeting all
|
| you also get hard starting.
| |
| | these requirements. We have new vehicles
|
| This scenario changes completely with
| |
| | smoking that obviously are not designed
|
| correctly set up injectors. Remember the
| |
| | to smoke when running on real diesel. So
|
| drum of oil? Well, if you could fill the
| |
| | when setting up a fuel injection system
|
| drum with a misty vapour of oil and light
| |
| | for tuning we have to take the burning
|
| it up, you would not only get a large
| |
| | characteristics of this poor diesel into
|
| bang but it would be over within a flash.
| |
| | consideration. Try to get your fuel from
|
| A good injector sprays fuel out as a mist
| |
| | a reputable and 'known brand' garage and
|
| and the fuel burns rapidly and relatively
| |
| | keep your receipts. If you have problems,
|
| clean as the droplets are so small that
| |
| | you then have as much 'come-back' on the
|
| they burn with a puff! A correctly set
| |
| | fuel garage as you have with a faulty
|
| injector pressure also means the fuel is
| |
| | product from a shop.
|
| being injected at the correct time.
| |
| | Safe 4WDriving,
|
| Now, the injectors are perfect but the
| |
| | The Diesel Experts
|
| injection pump could be slightly out of
| |
| | Footnote: The modern diesel has come a
|
| tune. Timing has to be set. If it is too
| |
| | long way from its beginnings!! Well...so
|
| early the vehicle can smoke and become
| |
| | we are all lead to believe!! That's where
|
| quite 'diesel noisy' and if it is too
| |
| | it all stops. In fact about the only
|
| late, the vehicle can feel sluggish.
| |
| | thing that could compare is reinventing
|
| Imagine the spray of fuel as a fist about
| |
| | the round wheel!! That's right. Nothing
|
| to hit the piston. If it is hit too far
| |
| | has really changed. A diesel still needs
|
| before top dead centre it would not only
| |
| | fuel and air. Even though we now have
|
| hurt your fist and the piston but it
| |
| | trendy things like 'Common-rail High
|
| would make a louder than normal bang as
| |
| | Pressure Injection and Electronics
|
| the two things hit head on. If the piston
| |
| | controlling everything, it is still the
|
| had gone past top dead centre and was
| |
| | same old principle. The only major change
|
| hit, the force of the hit would be going
| |
| | appears to be the repair costs... as
|
| down with the piston so you would have
| |
| | usual. Most 'high tech' injectors now
|
| too littleimpact on it. So you can see
| |
| | cost over $2000 each and are 'throw
|
| why timing is critical for maximum hit
| |
| | away'. Most Injector pumps are becoming
|
| effect! Other things need to be checked
| |
| | 'throw away' at around $6500. Where will
|
| like the fuel volume delivered by the
| |
| | it end??
|
| pump. Too much is power but with smoke,
| |
| |
|
