What Drives the Turbo?

[Timinator]

My turbo is assisted by some of the "extra" magnetism from my fuel line magnetic. Those things throw a really big magnetic field and keep all the metal objects under the hood working in harmony... .

 

[Doc Tinker]

OK... now... how about mpg in relationship to the turbo.

A gasser gets better mpg when you keep the vacuum down. Does that mean low boost in a turbo diesel = high mpg?

 

[ToolManTimTaylor]

Madmen like me... ... ... . Threatening works fine too #ad

 

[JyRO]

Nobody's getting mad here are they? I'm just playing around, don't want to start any hard feelings.

- JyRO

 

[jwgary]

Doc, actually the gasoline engine is running very inefficiently at high manifold vaccuum. It takes power away from the engine to produce that vaccuum. The reason you get worse gas mileage at WOT is that you are pumping much more fuel in and not really increasing speed very much. The lower boost you have means that you are burning less fuel. The engine will run better with more boost, but you need extra fuel for that. It's a double ended sword, but somewhere in the middle there is a good place to grab on to.

Also, the increase incylinder pressure is not just from heating air. The products of combustion less dense than the fuel and therefore take up more room and exert more pressure than just heating the air alone.

 

[Whitmore]

Having spent many years operating cryo-genic turbo expander plants (producing methane and ethane) I related it like this,there is a common shaft connecting the exhaust wheel and the wheel suppling combustion air,so given that the higer pressure and volicity of the exhaust turning the veins of the exhaust wheel thansfers the rotation thru the common shaft to the combustion wheel that feeds the intake with a positive pressure for combustion to the all mighty cummins. So the more exhaust the more boost,Right?Am I right here or all wet? Kevin #ad

Illflem,give us the smiley that spins out then hauls a$$ across the screan!
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2001 eth dee,qc,lwb,3. 55,camper and tow pkg,driftwood,cummins e-brake,jardine 4" exhaust,dz alum checker run boards,bed rail,tailgate protector,better built alum checker toolbox with home made fuel tank under box,"CUMN" licence plates and captain vol fire dept plate too

[This message has been edited by Whitmore (edited 03-29-2001). ]

 

[OO]

Much like a long line at the mens bathroom half are driven by gas pressure while the rest are driven by a urge not to s"!t their pants.

Sorry, I think something got lost in the comparison #ad
#ad
#ad

 

[illflem]

#ad

 

[Pete Peterson]

Quite simply without all the techno babble, the turbo is driven by your right foot!!!!Pete

 

[Alan Reagan]

I got the same kind as Pete. I push down with my right foot, the whistling gets louder. I let off, it get quieter and my gauge number is lower. It's the right foot.

 

[Sled Puller]

Pete and Alan win the award for KISS on this thread.
Can't believe you other geniouseses could not explain it that way.

PW-fash rush of gas? Say that fast 10 times!
Low boost= better mileage
High boost means you are on the go pedal have to get worse mileage.

 

[Archive]

Pete, Your Award is kinda like the hole saw... . you keep it a couple of days, and then send it on to the next TDR member!

 

[Pete Peterson]

No problem T. F. just as long as I can slobber on it for a day or two #ad
#ad
!!!!!!! Pete

 

[Missouri Mule]

Doc,
Your question - Does more rpm = more exhaust pressure? answer Yes.

Answer to second question= WASTEGATE (not yelling just emphasizing)

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Bill Thomas
Missouri Mule - 96 Wht 4X4 ST CC,5 spd, 3. 54, 8 ft bed, 1 ft high cheater boards.
99 Freightliner bl/wht FL60 ISB-5. 9 24v,215 hp,520 tq,6 spd, 3. 59 nsr,16 ft box, 19. 5 tires,Wt/gvw 11,000/23000

 

[Pete Peterson]

GEEEZZZ!! You mean I finally won something???? Pete #ad

 

[Un-Hemi]

MONEY! No money, no turnee.
Simple as that.
------------------
Tom Glover - VE7DQ, C-GWTG
99 QC SLT, LWB 4x2, ETC/DGP, Wht/Agate, etc.

[This message has been edited by TommyTurbosaurus (edited 03-31-2001). ]

 

[Crash_AF]

Here's a question, what is a wastegate and how does it work?

Later,
Joe


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Joe Hinson, 93 D-350
Stock, 3in straight pipe - For now

 

[ToolManTimTaylor]

a gate that allows waste to go by at a preset level.

Or what my neighbor has sittin in his back yard..... an old fence gate in good shape going towaste #ad
#ad

 

[zzman]

I can't stop laughing... ... ... ... ...

now I'm crying... ... ... ... ... ... ... .

But what about this.....

why doesn't the wastegate let out intake
pressure instead of exhaust????

 

[Missouri Mule]

zzman because it's the exhaust gas which makes the turbo go around.
The engine still needs air to run.
The intake side of turbo pulls air to it than sends it toward cylinders.
When you decrease speed of turbo you decrease amount of air flow and boost( air pressure).

Crash_AF At a set amount of pressure a door opens inside of turbo housing allowing some or enough exhaust to by pass turbine wheel to maintain safe boost,EGT and turbine speed.
Note: not all turbos have wastegates.