SMOKE
 

HAVE A FEW ????? ABOUT SMOKE, WHAT IS IT. IS MORE BETTER. I WAS AT THE TRACK AND A FEW PEOPLE STARTED TO TALK ABOUT IT LIKE SMOKE IS THE UNBERNT FUEL. TRUE OR NOT. WHEN THEY SEE IT SMOKEIN DOWN THE TRACK IS THIS SAYING THAT THEY STILL HAVE ENOUGH FUEL TO DO SOME MORE STUFF TO IT. LIKE BIGGER COMP WHEEL FOR THE TURBO. AND ALSO HOW MUCH HP IS THE BABY H1C GOOD FOR. AND HELP ME UNDERSTAND WHAT THIS SMOKE THIG IS....

HOW ABOUT TYPING WITHOUT THE CAPS LOCK ON......... IT IS REALLY ANNOYING......

smoke is unburnt fuel..... perty much if you build up a powerful truck the smoke will be there..... larger turbo's lag more and the trucks will smoke a bit to make it spool..... bigger injectors tend to create smoke...... if you add fuel then you need more air so most of the time guys will make it where it is a thick haze to know they aren't running out of fuel.....

Smoke is also good to piss people off, aka. environventalists and unsuspecting people with there windows down at stoplights. hehehe

And voters who might want to initiate smog requirements for Diesel vehicles... I'm not preaching, though, because I have no fewer than two of the "your vehicle has been seen emitting large quantities of smoke and you should get it inspected" letters on my wall...

But you do get some diminishing performance returns with the smoke; as you start adding fuel, you start getting smoke before you stop getting power. Especially with the older, inefficient Diesel's that have a difficulty burning all of the fuel injected; it's a problem with all Diesels, but our relatively obsoleted injection pumps, dated camshafts and poor-atomizing injectors aren't able to burn 100% of the fuel injected at any point of the fuel curve. To make sure that we burn a little bit more fuel, we have to inject a lot more fuel.

My truck at the moment, with a stock 18 cm housing, aftermarket tight torque converter and really worn injectors, can't be tuned to drive without smoke. If I go back to stock levels where I didn't smoke, I don't have enough power to get the tranny into second gear. As I put more turns on the fuel screw I get more smoke, but I need to give my inefficient engine all of that fuel in order to persuade it to actually burn half of it.

sorry about the caps i had half of it done then saw and i wasnt going back but anyway. so no matter what we do we will always have that smoke becuase when we get the air to burn it were gonna need bigger parts so then were gonnnna need more fuel untill we get to our max then we can back down. but hell i like the smoke. and allso how much hp will the baby h1c get to and the stock injectors.

Your truck, with the pre-91.5 9mm injectors that came stock, can be in the 300 HP neighborhood. The stock turbocharger's 18 cm housing can get you there, but it'll all be in a very narrow RPM band. And you will need a good enough drivetrain to put it to the ground.

The more efficient the engine is, the less smoke you'll need to make for a given power level with a given turbocharger. Good atomizing injectors (like EDM's) help the most, and an injection pump that uses higher pressures is naturally better. Camshafts, porting, exhaust and air system mods all help too, but that's because they let the turbo operate more efficiently instead of letting the fuel burn more efficiently. Nitrous and water also help the the turbo operate more efficiently, while alcohol and propane help the fuel burn more efficiently.

Fuel burn efficiency is a direct result of how well the turbo is operating. The fuel system doesnt compliment the turbo, it's the other way around.

Atomization of the fuel and the pattern of the spray is what allows the fuel to be mixed with the air provided by the turbocharger; the finer the atomization and wider the spray, the faster and cleaner the burn.

If a turbocharger could clean up sloppy injectors like the ones Bullydog used to have or Lucas POD's, then that turbocharger could be supporting 50% more power with the same amount of smoke using Piezo or EDM injectors.

Atomization is achieved by the injectors not the air from the turbo. The turbo supplies the required amount of air that the atomized fuel needs to burn efficiently without pushing it out the exhaust and wasting the energy. Hence the black smoke from diesels. They are supplying more fuel than the turbo can keep up with and dumping partially burned fuel out of the exhaust. Take the turbo away from a modern turbo diesel engine and it will do nothing but pour black smoke and produce no energy.

A turbo can "keep up" with a well-atomizing injector much, much eaisier than it can "keep up" with a poorly-atomizing injector.

A Piezo and POD could both be injecting the same amount of fuel with the same turbo, and the Piezo would be making less smoke and more power every time. Becase it is a more efficient injector.

I never said that an efficient turbo wasn't as important as an efficient injection system, but turbo efficiency isn't part of the diminishing-returns equation germane to smoke; if you could assume a 100% efficient injection system, there would be no diminishing-return equation germane to smoke.

Only atomized fuel can burn. Injector inefficiency states that only a given percentage of the injected fuel is atomized in the combustion chamber; you have to let yourself not-burn some fuel so you can-burn the fuel that came with it.

By supplying enough high-pressure air, turbochargers can force fuel to be atomized. But that's an inheirently inefficient process; it takes time, which an engine at high-RPM doesn't have.