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blugu ADMINISTRATOR
Countries/State : Age : 46 location : Kota Kinabalu-Putatan Tag ID: : SFC02202 Points : 12595 Reputation : 10 Number of posts : 2945
| Subject: Turbo vs. Supercharger 30/10/2008, 8:03 pm | |
| First topic message reminder :
Turbo vs. Supercharger 4/3/2002 11:31:00 PM
It's one of the most common questions we are asked - the answer to which is almost impossible to find "What is better - a supercharger or a turbo?"
We only wish the answer were that simple, but unfortunately it is not. The simple answer is: "It depends." But don't worry, we'll go into more depth than that here. Both superchargers and turbos have distinct advantages and disadvantages. Selecting the right kind of forced induction for your vehicle will depend upon your particular vehicle, your driving habits, your power preferences, and your needs.
Clearing Up Confusion According to Merriam-Webster's dictionary, a supercharger is defined as: "a device (as a blower or compressor) for pressurizing the cabin of an airplane or for increasing the volume air charge of an internal combustion engine over that which would normally be drawn in through the pumping action of the pistons". A turbocharger is defined as: "a centrifugal blower driven by exhaust gas turbines and used to supercharge an engine".
According to Webster's, a turbocharger is included in the definition for superchargers - it is in fact a very specific type of supercharger - one that is driven by exhaust gasses. Other superchargers that do not fall into this category - the kind that we are all used to hearing about - are normally driven directly from the engine's crankshaft via a crank pulley. So in reality, it is not fair to compare all superchargers to turbochargers, because all turbochargers are also superchargers. For the purpose of this discussion, however, a supercharger will be considered all superchargers that are are not driven directly by the engine, while turbochargers will be considered all superchargers that are driven by engine exhaust gasses.
Similarities Both superchargers and turbochargers are forced induction systems and thus have the same objective - to compress air and force more air molecules into the engine's combustion chambers than would normally be allowed at atmospheric pressure here on Earth (14.7 psi at sea level). The benefit of forcing more air molecules into the combustion chambers is that it allows your engine to burn more fuel per power stroke. With an internal combustion engine, burning more fuel means that you convert more fuel into energy and power. For this reason, supercharged and turbocharged engines normally produce 40% to 100% more power (depending on the amount of boost - check out our horespower calculator) than normally aspirated engines.
How They Work A supercharger is mounted to the engine and is driven by a pulley that is inline with the crank (or accessory) belt. Air is drawn into the supercharger and compressed by either an impeller (centrifugal-style supercharger), twin rotating screws (screw-type supercharger), or counter-rotating rotors (roots-type supercharger). The air is then discharged into the engine's intake. Faster crank speed (more engine rpm) spins the supercharger faster and allows the supercharger to produce more boost (normally 6 to 9 psi for a street vehicle). Typical peak operating speeds for a supercharger are around 15,000 rpm (screw-type and roots style superchargers) and 40,000 rpm (centrifugal-style superchargers).
A turbocharger operates in much the same way as a centrifugal (internal impeller) supercharger, except it is not driven by pulleys and belts attached to the engine's crank. A turbo is instead driven by exhaust gasses that have been expelled by the engine and are travelling through the exhaust manifold. The exhaust gas flows through one half of the turbocharger's turbine, which drives the impeller that compresses the air. Typical operating speeds of a turbocharger are between 75,000 and 150,000 rpm.
Head to Head Comparison Now it's time to evaluate the turbocharger versus the supercharger according to several important factors.
Cost The cost of supercharger and a turbocharger systems for the same engine are approximately the same, so cost is generally not a factor.
Lag This is perhaps the biggest advantage that the supercharger enjoys over the tubo. Because a turbocharger is driven by exhaust gasses, the turbocharger's turbine must first spool up before it even begins to turn the compressor's impeller. This results in lag time which is the time needed for the turbine to reach its full throttle from an intermediate rotational speed state. During this lag time, the turbocharger is creating little to no boost, which means little to no power gains during this time. Smaller turbos spool up quicker, which eliminates some of this lag. Turbochargers thus utilize a wastegate, which allows the use of a smaller turbocharger to reduce lag while preventing it from spinning too quickly at high engine speeds. The wastegate is a valve that allows the exhaust to bypass the turbine blades. The wastegate senses boost pressure, and if it gets too high, it could be an indicator that the turbine is spinning too quickly, so the wastegate bypasses some of the exhaust around the turbine blades, allowing the blades to slow down.. A Supercharger, on the other hand, is connected directly to the crank, so there is no "lag". Superchargers are able to produce boost at a very low rpm, especially screw-type and roots type blowers.
Efficiency This is the turbo's biggest advantage. The turbocharger is generally more economical to operate as it as it is driven primarily by potential energy in the exhaust gasses that would otherwise be lost out the exhaust, whereas a supercharger draws power from the crank, which can be used to turn the wheels. The turbocharger's impeller is also powered only under boost conditions, so there is less parasitic drag while the impeller is not spinning. The turbocharger, however, is not free of inefficiency as it does create additional exhaust backpressure and exhaust flow interruption.
Heat Because the turbocharger is mounted to the exhaust manifold (which is very hot), turbocharger boost is subject to additional heating via the turbo's hot casing. Because hot air expands (the opposite goal of a turbo or supercharger), an intercooler becomes necessary on almost all turbocharged applications to cool the air charge before it is released into the engine. This increases the complexity of the installation. A centrifugal supercharger on the other hand creates a cooler air discharge, so an intercooler is often not necessary at boost levels below 10psi. That said, some superchargers (especially roots-type superchargers) create hotter discharge temperatures, which also make an intecooler necessary even on fairly low-boost applications.
Surge Because a turbocharger first spools up before the boost is delivered to the engine, there is a surge of power that is delivered immediately when the wastegate opens (around 3000 rpm). This surge can be damaging to the engine and drivetrain, and can make the vehicle difficult to drive or lose traction.
Back Pressure Because the supercharger eliminates the need to deal with the exhaust gas interruption created by inserting a turbocharger turbine into the exhaust flow, the supercharger creates no additional exhaust backpressure. The amount of power that is lost by a turbo's turbine reduces it's overall efficiency.
Noise The turbocharger is generally quiter than the supercharger. Because the turbo's turbine is in the exhaust, the turbo can substantially reduce exhaust noise, making the engine run quieter. Some centrifugal superchargers are known to be noisy and whistley which, annoys some drivers (we, however, love it!)
Reliability In general, superchargers enjoy a substantial reliability advantage over the turbocharger. When a a turbo is shut off (i.e. when the engine is turned off), residual oil inside the turbo's bearings can be baked by stored engine heat. This, combined with the turbo's extremely high rpms (up to 150,000rpm) can cause problems with the turbo's internal bearings and can shorten the life of the turbocharger. In addition, many turbos require aftermarket exhaust manifolds, which are often far less reliable than stock manifolds.
Ease of Installation Superchargers are substantially easier to install than a turbos because they have far fewer components and simpler devices. Turbos are complex and require manifold and exhaust modifications, intercoolers, extra oil lines, etc. - most of which is not needed with most superchargers. A novice home mechanic can easily install most supercharger systems, while a turbo installation should be left to a turbo expert.
Maximum Power Output Turbos are known for their unique ability to spin to incredibly high rpms and make outrages peak boost figures (25psi ). While operating a turbocharger at very high levels of boost requires major modifications to the rest of the engine, the turbo is capable of producing more peak power than superchargers.
Tunability Turbochargers, because they are so complex and rely on exhaust pressure, are notoriously difficult to tune. Superchargers, on the other hand, require few fuel and ignition upgrades and normally require little or no engine tuning.
Conclusion While the supercharger is generally considered to be a better method of forced induction for most street and race vehicles, the turbo will always have its place in a more specialized market. Superchargers generally provide a much broader powerband that most drivers are looking for with no "turbo lag". In addition, they are much easier to install and tune, making them more practical for a home or novice mechanic.
We hope you have found this discussion informative and unbiased. Sometimes when we explain this to our customers, they say that we are biased towards superchargers because that is all we carry. We remind those customers that a turbo is a kind of supercharger and that we truly hope to carry turbochargers someday. The reason we do not currently sell any turbochargers is because we have not yet found a turbo system that is suitable for mail-order / e-commerce sale. We are not prepared to sell a turbo system that is difficult to install and requires the attention of a professional engine tuner or mechanic. If any turbocharger manufacturer makes such a system, please send us the details as we would love to carry such a product.
Sources : http://www.superchargersonline.com/content.asp?ID=19 |
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Nieto ADMINISTRATOR
Countries/State : Age : 36 location : Kota Kinabalu Tag ID: : SFC 01287 Points : 13985 Reputation : 34 Number of posts : 5595
| Subject: Re: Turbo vs. Supercharger 11/5/2009, 9:48 pm | |
| bro adead, buka satu topic baru untuk tanya mivec punya info. lebih banyak sifu akan explain untuk kamu.
buat ice breaking ya~~ |
| | | pearjal FRESHIE
Countries/State : Age : 39 location : tawau Points : 11566 Reputation : 0 Number of posts : 34
| Subject: Re: Turbo vs. Supercharger 11/5/2009, 10:54 pm | |
| o0o0o0o0o0oo0denger............. |
| | | Altec90 SUPERIOR
Countries/State : Age : 33 location : Sabah, KK, Penampang Tag ID: : SFC 02424 Points : 12720 Reputation : 3 Number of posts : 1890
| Subject: Re: Turbo vs. Supercharger 11/5/2009, 11:13 pm | |
| - adead wrote:
- aku nak tahu tentang enjin mivec MD
SO far i see 6A12 MIVEC MD. Any 4g9x got MIVEC MD?? |
| | | swordfishxox WEBMASTER
Countries/State : Age : 44 location : Putrajaya, Perak Tag ID: : SFC 04219 Points : 16605 Reputation : 35 Number of posts : 4825
| Subject: Re: Turbo vs. Supercharger 15/5/2009, 6:00 pm | |
| turbo power... xmain la supercharger... macam charge bateri je... wakakaka
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| | | matnoor REGULAR
Countries/State : Age : 37 location : Labuan - Gerai bukit Tg. Aru... Points : 11858 Reputation : 3 Number of posts : 390
| Subject: Re: Turbo vs. Supercharger 16/5/2009, 5:55 pm | |
| hehehe...masing² ada minat tersendiri bah... |
| | | burjawi FRESHIE
Countries/State : Age : 34 location : kampar Points : 11325 Reputation : 1 Number of posts : 55
| Subject: Re: Turbo vs. Supercharger 28/6/2009, 6:11 pm | |
| waaahhh
so many info
glad 2 b here... |
| | | gryphoon81 JUNIOR
Countries/State : Age : 43 location : Putrajaya Website : www.bloggermiey.com Points : 11874 Reputation : 0 Number of posts : 113
| Subject: Re: Turbo vs. Supercharger 3/8/2009, 11:11 am | |
| Hmmm...turbo dah...supercharge lah pula....AMR300 |
| | | DonJuanDeMarco REGULAR
Countries/State : Age : 47 location : SHAH ALAM Points : 12007 Reputation : 9 Number of posts : 269
| Subject: Re: Turbo vs. Supercharger 30/8/2009, 1:01 pm | |
| turbo mmg hebat pada PIT HP tapi torque cepat drop pada high rpm.. pada low rpm terpaksa melayan lag....ini keburukan pada low speed coner.pada high speed coner pula boost tak mudah dikawal..terlebih tekan kete leh lose control terlebih rembat lak temp naik (reading pada exzos temp) kelebihan pada turbo mungkin pada pit HP ..kalu pandai manfaatkan dah tentu sukar digugat.
sacara peribadinye street performance lebih sesuai pada supercharger.. low rpm sangat kuat malah torque pada mid & high liner.. layan low or high speed coner still supercharger ada kelebihan.. malah senang untuk u control speed or trottle ketika sedang mengambil selekoh. ini kerana system scharger bergantung pada crank puli,secara xlangsung boost senang dikawal by trottle.. |
| | | ProjectD ADMINISTRATOR
Countries/State : Age : 36 location : Kk-Keningau-Beaufort-Kuching Tag ID: : SFC02081 Points : 14368 Reputation : 10 Number of posts : 6723
| Subject: Re: Turbo vs. Supercharger 6/9/2009, 12:17 pm | |
| macam mna kalau drag race bro DonJuanDeMarco,turbo atau supercharger ada kelebihan..? |
| | | DonJuanDeMarco REGULAR
Countries/State : Age : 47 location : SHAH ALAM Points : 12007 Reputation : 9 Number of posts : 269
| Subject: Re: Turbo vs. Supercharger 6/9/2009, 12:51 pm | |
| masing2 ada kelebihan..tgk setup.. kongsi2... scharger di 4g93 |
| | | jas SENIOR
Countries/State : Age : 38 location : kota belud ke inanam Points : 11915 Reputation : 0 Number of posts : 697
| Subject: Re: Turbo vs. Supercharger 16/9/2009, 1:46 pm | |
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| | | DonJuanDeMarco REGULAR
Countries/State : Age : 47 location : SHAH ALAM Points : 12007 Reputation : 9 Number of posts : 269
| Subject: Re: Turbo vs. Supercharger 18/9/2009, 10:45 pm | |
| supercharger powerzone la bro.... ni kete custome eaton base supercharger.... water to air intercooler system.. |
| | | ProjectD ADMINISTRATOR
Countries/State : Age : 36 location : Kk-Keningau-Beaufort-Kuching Tag ID: : SFC02081 Points : 14368 Reputation : 10 Number of posts : 6723
| Subject: Re: Turbo vs. Supercharger 20/9/2009, 3:53 am | |
| best btul brg powerzone ni....huhuhu... |
| | | m_hafiz CONTRIBUTOR
Countries/State : Age : 42 location : Borneo Paradise,)mcm d kK,) Tag ID: : SFC 05031 Points : 12556 Reputation : 7 Number of posts : 1146
| Subject: Re: Turbo vs. Supercharger 25/9/2009, 4:27 pm | |
| Kasi Tambah NoS gi mantap KASI Gegar bila perlu lah ... |
| | | AP3_3927 REGULAR
Countries/State : Age : 31 location : keningau-kk Tag ID: : SFC 05172 Points : 11856 Reputation : 3 Number of posts : 338
| Subject: Re: Turbo vs. Supercharger 28/9/2009, 7:52 pm | |
| pendek kata ada sesetengah org ckap yg turbocharged ni menang short distance je klu long distance pula supercharged yg makan. sebab supercharge lebih jauh jlan lebih bnyk power dpt dihasilkan b'banding turbo. manakala turbo pula bnyk produce power time pick-up. correct me if i wrong happy boosting |
| | | DonJuanDeMarco REGULAR
Countries/State : Age : 47 location : SHAH ALAM Points : 12007 Reputation : 9 Number of posts : 269
| Subject: Re: Turbo vs. Supercharger 30/9/2009, 12:39 pm | |
| tak jugak...
turbo still ada kelebihan walau pun torque cepat drop & turbo lag TAPI pit torque nya sangat tinggi......tak semestinya top speed drop sebab gear ratio turbo matching dengan power torque.....
melainkan n/a BOT or kete injin turbo tapi gearbox n/a....
turbo or scharger kedua/duanya ada kelebihan..
macam kita Bold on scharger,ada isu gear 1&2 "terlalu" over spin..cause power torque dah tak match dengan gear ratio... kene custom gear ratio berdasarkan dyno chart.... |
| | | M!$z D3v!L MODERATOR
Countries/State : Age : 36 location : kay kay Tag ID: : SFC 04114 Points : 12381 Reputation : 1 Number of posts : 1451
| Subject: Re: Turbo vs. Supercharger 8/10/2009, 1:00 pm | |
| - AP3_3927 wrote:
- pendek kata ada sesetengah org ckap yg turbocharged ni menang short distance je klu long distance pula supercharged yg makan. sebab supercharge lebih jauh jlan lebih bnyk power dpt dihasilkan b'banding turbo. manakala turbo pula bnyk produce power time pick-up.
correct me if i wrong happy boosting tebalik la bro huhu supecas makan short, tobo long..it all comes down to tuning n $$$ =) ngam setting n/a pun boleh makan FI apa.. |
| | | AP3_3927 REGULAR
Countries/State : Age : 31 location : keningau-kk Tag ID: : SFC 05172 Points : 11856 Reputation : 3 Number of posts : 338
| Subject: Re: Turbo vs. Supercharger 10/10/2009, 1:25 pm | |
| - M!$z D3v!L wrote:
- AP3_3927 wrote:
- pendek kata ada sesetengah org ckap yg turbocharged ni menang short distance je klu long distance pula supercharged yg makan. sebab supercharge lebih jauh jlan lebih bnyk power dpt dihasilkan b'banding turbo. manakala turbo pula bnyk produce power time pick-up.
correct me if i wrong happy boosting tebalik la bro huhu supecas makan short, tobo long..it all comes down to tuning n $$$ =) ngam setting n/a pun boleh makan FI apa.. yaka hehe.. sory2.. bdak bru blajar bha ni.. ya2.. btul tu.. yg penting ada $$ kereta ttp laju.. |
| | | pp FRESHIE
Countries/State : Age : 38 location : kb Points : 10768 Reputation : 1 Number of posts : 2
| Subject: Re: Turbo vs. Supercharger 3/3/2010, 2:21 am | |
| ak br dlm ni..xth cmne nk borak2..sorang tlg msg aku bgtau cmne..nk ty psl enjin evo3..ok x msk blok mirage 1.8..sbb nk ndose..pastu mn ok ngn gsr turbo..ok gsr ker..ok evo blok mirage.. |
| | | mat0p FRESHIE
Countries/State : Age : 40 location : kulim/penang Points : 10690 Reputation : 1 Number of posts : 4
| Subject: hallo 7/4/2010, 8:57 pm | |
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| | | kraven FRESHIE
Countries/State : Age : 40 location : sandakan Points : 10613 Reputation : 1 Number of posts : 1
| Subject: Re: Turbo vs. Supercharger 14/5/2010, 10:58 am | |
| hi everybody, i'm new here. just wan to ask anyone know where can i get the nissan sr20ve enjine in sabah? |
| | | overboost FRESHIE
Countries/State : Age : 38 location : sandakan Points : 10601 Reputation : 1 Number of posts : 17
| Subject: Re: Turbo vs. Supercharger 28/5/2010, 12:31 pm | |
| ya btl 2 matnor, msing2 pn ada kelebihan. turbo @pn supercharger. |
| | | naz27 FRESHIE
Countries/State : Age : 35 location : Kota kinabalu Points : 11010 Reputation : 1 Number of posts : 48
| Subject: Re: Turbo vs. Supercharger 28/5/2010, 4:01 pm | |
| apa ke kkurangan turbo/sprchrge if kac msk kt engne n/a..? sja2 mau tmbh ilmu2 ne.. |
| | | naz27 FRESHIE
Countries/State : Age : 35 location : Kota kinabalu Points : 11010 Reputation : 1 Number of posts : 48
| Subject: Re: Turbo vs. Supercharger 6/6/2010, 9:17 pm | |
| bro, nk tmbh ilmu sikit.. antra trbo ngan sprchrge.. mna lg jimat myk? heheh.. |
| | | bod_supersperm SUPERIOR
Countries/State : Age : 43 location : kota kinabalu sabah Tag ID: : SFC 03551 Points : 14161 Reputation : 6 Number of posts : 2276
| Subject: Re: Turbo vs. Supercharger 7/6/2010, 8:50 am | |
| jimat sikit Turbo kali...sebb supercharge pakai belting..hehe..mybe la.. |
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