Turbochargers VS Superchargers?

[Rob Hall]

Volvo has offered a 4cyl w/ both a turbocharger and a supercharger in recent years.  Kind of an interesting idea. 

[1972coronet]

1 hour ago, Ace-Garageguy said:

And if a 14-71 on the street isn't enough fer ya, how 'bout sumpin from a locomotive? (Yes, it's real.)

24v ? Same as , or similar-to - the oceanliners' engines ? 

Biggest I've seen in person  on a car was a 16v-71.

[stitchdup]

9 minutes ago, 1972coronet said:

24v ? Same as , or similar-to - the oceanliners' engines ? 

Biggest I've seen in person  on a car was a 16v-71.

i've had my head inside the inlet for the turbos on the boat. it had 8 of them (4 massive volvo engines)

[johnyrotten]

20 minutes ago, stitchdup said:

i've had my head inside the inlet for the turbos on the boat. it had 8 of them (4 massive volvo engines)

Those things are in a whole other realm. Never seen them firsthand, but absolutely amazing pieces of engineering. 

Edited July 13 by johnyrotten

[stitchdup]

16 minutes ago, johnyrotten said:

Those things are in a whole other realm. Never seen them firsthand, but absolutely amazing pieces of engineering. 

i wonder if it would fit a vr? lol

[JollySipper]

I've only had any experience with two turbocharged cars........ First, when I was 16 I had the chance to buy an '80s Dodge Daytona with the 'charged 2.2L engine. It was dark plum with matching interior, and was a manual! I wanted it, but getting it didn't work out. Then some years later I purchased a Pontiac Sunbird that was turbocharged. If it had been a manual it would have been more fun........ It ended up burning a valve, so I sold it......

[Ace-Garageguy]

1 hour ago, JollySipper said:

I've only had any experience with two turbocharged cars...

Turboed cars can be great. Think about the Porsche 930 that set a performance benchmark and was one of the most desirable cars on the planet, even though it was not very forgiving to drive.

                                                        

They also tend to be complex and reliability and ease of service/maintenance can suffer as a consequence.

Back in the '80s there were many shops turboing everything imaginable, and while a lot were turkey hack-jobs, some were well thought-out and engineered and beautifully fabricated...and very fast.

                              

[stitchdup]

aston martin were involved with putting turbos on mk3 capris through their tickford brand. they bring good money now. 

[Rob Hall]

Never owned a turbocharged or supercharged car, but I have driven modern CUVs with tiny 4cyl turbos--my sister's Chevy Trax and Equinox, both had turbo 4s.  Not performance cars, but decent point A to point B economy CUVs.  Good gas mileage.  

A supercharged car may be in my future, though. 

Edited Tuesday at 05:41 PM by Rob Hall

[JollySipper]

23 minutes ago, Rob Hall said:

A supercharged car may be in my future, though.

Procharger on the Mustang? That would be neat............. 

[Rob Hall]

Just now, JollySipper said:

Procharger on the Mustang? That would be neat............. 

Thinking about a late model S550 Shelby GT500 or late model Cadillac CT5 V-series Blackwing. 

[stavanzer]

A quik Wiki overview of "Twin Charging"

https://en.wikipedia.org/wiki/Twincharger

and "Turbo Compounding"

https://en.wikipedia.org/wiki/Turbo-compound_engine

[Ace-Garageguy]

6 minutes ago, stavanzer said:

A quik Wiki overview of "Twin Charging"

https://en.wikipedia.org/wiki/Twincharger

and "Turbo Compounding"

https://en.wikipedia.org/wiki/Turbo-compound_engine

I fergit who first came up with it (Porsche 959??), but I always kinda liked the sequential twin-turbo setups that used a small one to make boost early, and a larger one to really pour on the coal as revs came up. Better low-end throttle response, flatter power and torque curves, etc.

Edited Wednesday at 02:15 PM by Ace-Garageguy

[johnyrotten]

2 hours ago, Ace-Garageguy said:

I always kinda liked the sequential twin-turbo setups that used a small one to make boost early, and a larger one to really pour on the coal as revs came up

I've seen diesel guys do this to make absolutely absurd amounts of power, and then split blocks in half. I've seen video of a triple turbo set up on diesel drag truck,pretty amazing stuff.

Edited Wednesday at 04:25 PM by johnyrotten

[stitchdup]

i want to see a radial engine with a multi turbo set up. even if its only for show and never runs. it would be like those rolling bombs us british tried in ww2 wrapped in tube

[johnyrotten]

1 hour ago, stitchdup said:

i want to see a radial engine with a multi turbo set up

Yes!! 

[Ace-Garageguy]

1 hour ago, stitchdup said:

i want to see a radial engine with a multi turbo set up. even if its only for show and never runs...

Not a "multi", but the WW II P-47 Thunderbolt used a huge turbocharger to boost the power at altitude of it's big radial Pratt & Whitney R-2800 Double Wasp.

    

Edited Wednesday at 06:12 PM by Ace-Garageguy

[stavanzer]

Wright R3350 Turbo Compound Radial Engine

The PRT. Power Recovery Turbine. One of Three on the Engine.

Known by Mechanics as the "Parts Recovery Turbine" due to the Many Engine failures they caused.

https://en.wikipedia.org/wiki/Turbo-compound_engine

 

[JollySipper]

10 hours ago, stavanzer said:

A quik Wiki overview of "Twin Charging"

https://en.wikipedia.org/wiki/Twincharger

and "Turbo Compounding"

https://en.wikipedia.org/wiki/Turbo-compound_engine

That's some interesting stuff!   

[JollySipper]

8 hours ago, johnyrotten said:

I've seen diesel guys do this to make absolutely absurd amounts of power, and then split blocks in half. I've seen video of a triple turbo set up on diesel drag truck,pretty amazing stuff.

So, the turbo closest to the engine gets it off the line, and the other two come on in sequence? 

 

[Ace-Garageguy]

2 hours ago, JollySipper said:

So, the turbo closest to the engine gets it off the line, and the other two come on in sequence? 

 

If  I'm understanding the plumbing in that setup correctly, all three turbines are driven directly all the time by engine exhaust straight from the exhaust ports.

The two compressor outputs farthest from the engine are directed into the compressor inlet of the unit closer to the engine, where it's compressed further, achieving even higher pressure at its compressor outlet...and the plumbing from that outlet is missing in the photo. 

Presumably the output from the third compressor...the one closest to the engine...would be directed to an intercooler before being delivered to the intake manifold.

That's not the layout of the sequential system I was referring to.

------------------------------------------------------------------

This is closer to what I  was referring to, where the smaller turbo on the right spools up faster, giving some boost al lower RPM, and as engine speed increases and exhaust gas volume and heat climb, the larger turbo on the left begins to provide increased boost.

EDIT: The illustration below is missing some elements and can be somewhat confusing as a consequence. Just goes to show that as usual, everything posted on the internet isn't necessarily absolutely correct information.

SEE VIDEO BELOW:

https://www.youtube.com/watch?v=__xVz4G-uZo&ab_channel=MarineEngineeringHub

 

Edited Thursday at 03:04 AM by Ace-Garageguy

[Ace-Garageguy]

MORE CLARIFICATION:

 

[johnyrotten]

8 hours ago, JollySipper said:

So, the turbo closest to the engine gets it off the line, and the other two come on in sequence? 

 

It's two 88's feeding a 106mm. This kind of set up is "easier" on the turbos, less wear and tear, and for situations where you can't source an appropriate sized primary or secondary turbo,as I understand it. Boost in the neighborhood of 130 pounds. I believe the two smaller units are acting as one,and supplies the volume to the larger.