This Many Turbochargers Is Too Many

One of nan top quality inventions of each clip is nan exhaust-driven turbine supercharger, colloquially known arsenic nan turbocharger, aliases turbo. When 1 of these bad boys starts winding up, you cognize you're successful for either a accelerated thrust aliases an epic explosion. And if 1 turbo is good, surely much is better, right? But really galore much tin you put connected a car earlier it's conscionable excessively many? It seems for illustration conscionable astir each state and diesel conveyance connected nan marketplace coming features a turbocharged engine. There are plentifulness of twin-turbocharged engines out there, excessively (lots of pickup trucks and SUVs usage twin-turbo V6 engines these days), and Bugatti moreover made 4 turbos make consciousness backmost successful nan 1990s. 

When twin-turbocharged engines are tally successful parallel alternatively than sequentially, you're getting a spot of a discuss that still useful amended than a azygous turbocharger. By moving 2 turbos connected a V8 engine, let's say, each turbo will beryllium spun up by its ain slope of 4 cylinders. This allows you to usage smaller turbochargers, which spool quicker connected launch, while providing a larger amount of compressed aerial astatine a fixed RPM. More boost and much powerfulness without nan monolithic boost unit period hold of a azygous large turbo. What if you want to do much than that, though? 

Three- to five-cylinder engines typically don't request much than 1 turbocharger. Engines utilizing betwixt six and 12 cylinders tin usually make do pinch a brace of turbochargers. Anything 12 cylinders aliases supra tin beryllium engineered to usage four, but that isn't needfully required to make large power.

There isn't really a number astatine which you could extremity adding turbochargers to an engine. With a chaotic capable imagination and a ample capable slope account, you could theoretically build compound turbo setups that provender each different fundamentally infinitely. There is decidedly a constituent astatine which further turbochargers won't make further power, though. With tons of dyno time, a immense budget, and bully fabrication skills, you could find retired that number for your ain application, but I don't urge going that route.

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It's important to talk astir what a turbocharger is and really it works. Each turbo has an exhaust turbine that captures power from nan travel of exhaust gases, and a compressor instrumentality that pressurizes ambient aerial earlier pushing it into your engine. Compressed aerial makes nan combustion unit successful nan cylinder much powerful. The much exhaust travel you have, nan faster nan turbine spins, necessitating nan turbocharger spool up earlier delivering boost. The short type of that method communicative is that a turbocharger helps your motor make much power.

There are measurement excessively galore variables to really dumb it down to a fewer elemental sentences, but nan wide norm of thumb is that a smaller turbocharger will spool faster and tally retired of steam astatine higher RPM ranges, while a larger turbocharger will make much power, but takes a batch longer to supply first power. Back successful nan bully aged days, immoderate cars for illustration Porsche's 959 and Toyota's MkIV Supra utilized sequential turbochargers pinch a mini turbo for off-the statement acceleration feeding into a larger turbo for higher-RPM boost. These days OEMs tin person nan champion of some worlds pinch adaptable geometry turbocharger housings that turn arsenic boost builds

Bugatti famously utilized 4 turbochargers for its EB110 V12 and later for nan Veyron 16.4. Like successful nan supra twin-turbo V8 analogy, Bugatti employed smaller turbochargers to make much powerfulness without feeding each of nan exhaust unit and spinning nan turbines faster. With these ample multi-cylinder engines, aggregate turbochargers tin beryllium utilized without overmuch downside. It would make a batch little consciousness to usage 4 turbochargers, say, connected a four-cylinder engine, aliases 8 turbochargers connected an eight-cylinder engine. 

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These days, nan ratio of a turbocharger has improved truthful overmuch from erstwhile they were introduced to roadworthy cars successful nan 1960s, that you could easy usage a azygous turbocharger connected a larger engine, peculiarly with electrical turbocharger pre-spooling for low-RPM driving, for illustration they person utilized successful Formula One aliases for illustration Porsche uses successful its newest 911 GTS. 

The Mustang illustration built by Boosted Lifestyle successful nan video supra is decidedly not moving to maximize turbine ratio aliases power. It makes large power, sure, but sometimes little is more. In this case, each of nan 8 turbochargers is fed by a azygous cylinder's exhaust gases, which requires each to beryllium rather mini successful bid to really build boost.

Perhaps adding much turbos is simply a method to amended off-the-line acceleration for thing for illustration a 1/8th-mile car, but nan aerodynamic drag, accrued heat, monolithic cost, build effort, and inefficiency make it a dubious proposition astatine best. A properly-sized single- aliases twin-turbo setup would apt beryllium amended successful conscionable astir each way. Oh, and you'd beryllium capable to spot wherever you're going.

Or, you know, you only unrecorded once, truthful why not build a quad-turbo four-cylinder for your Honda S2000 and show america really it went. Maybe you'll fig thing retired that nan OEM engineers ne'er could, because you're a smart fella. It's really up to you; nan world is your oyster. If you deliberation you request a Ram with 17 turbines spinning up boost for your Cummins, spell for it.