Lancer Evo VIII turbo.. or twin turbo
04-26-2006, 10:25 PM
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Lancer Evo VIII turbo.. or twin turbo
All this time i thought the evo was turbocharged (single), but my friend just told me its a twin turbo? I did some research and found it called twin-scrolled. What exactly does that mean and would that qualify as being twin-turboed?
04-26-2006, 10:30 PM
#2
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A "twin scroll" or "divided inlet" means that there are two separate volutes within the turbine housing. The main reason for doing this is to isolate the pulses coming from each exhaust port and maintain more of the pulse energy from each cylinder all the way down to the turbine wheel. There are no differences between the turbine wheels used in open or single inlet turbines compared to those used in twin or divided inlet turbines.
Generally speaking, a divided inlet turbine setup will respond faster and produce boost quicker than single or open design of the same nozzle area, of course this is dependent upon proper execution. The simple fact that a divided housing is used does not guarantee these results.
While it does not cause any problems or harm to run a divided inlet turbine housing on a manifold that is an "open" design, none of the benefits of the twin inlet will be seen.
Generally speaking, a divided inlet turbine setup will respond faster and produce boost quicker than single or open design of the same nozzle area, of course this is dependent upon proper execution. The simple fact that a divided housing is used does not guarantee these results.
While it does not cause any problems or harm to run a divided inlet turbine housing on a manifold that is an "open" design, none of the benefits of the twin inlet will be seen.
04-26-2006, 10:36 PM
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it doesn't mean that it's twin-turboed. Your friend is suffering from noob-***-itis. It's not your fault, for these people can be very persuasive with their jedi-mind-tricks. No manufacturer in their right mind is going to slap two turbo's on a 4cly. People talk about doing it, but find that it's just a waste of money and wind up going with just a single fat *** turbo.
Originally Posted by some website faq of company X
What are twin scroll or divided inlet turbine housings? What are the benefits of using a twin scroll turbo?
A "twin scroll" or "divided inlet" means that there are two separate volutes within the turbine housing. The main reason for doing this is to isolate the pulses coming from each exhaust port and maintain more of the pulse energy from each cylinder all the way down to the turbine wheel. There are no differences between the turbine wheels used in open or single inlet turbines compared to those used in twin or divided inlet turbines.
Generally speaking, a divided inlet turbine setup will respond faster and produce boost quicker than single or open design of the same nozzle area, of course this is dependent upon proper execution. The simple fact that a divided housing is used does not guarantee these results.
While it does not cause any problems or harm to run a divided inlet turbine housing on a manifold that is an "open" design, none of the benefits of the twin inlet will be seen. "
A "twin scroll" or "divided inlet" means that there are two separate volutes within the turbine housing. The main reason for doing this is to isolate the pulses coming from each exhaust port and maintain more of the pulse energy from each cylinder all the way down to the turbine wheel. There are no differences between the turbine wheels used in open or single inlet turbines compared to those used in twin or divided inlet turbines.
Generally speaking, a divided inlet turbine setup will respond faster and produce boost quicker than single or open design of the same nozzle area, of course this is dependent upon proper execution. The simple fact that a divided housing is used does not guarantee these results.
While it does not cause any problems or harm to run a divided inlet turbine housing on a manifold that is an "open" design, none of the benefits of the twin inlet will be seen. "
04-26-2006, 10:41 PM
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What wrong with him posting correct info to a users question?
Granted, NoTears didn't cite his source, but so what? It's not like he trolls this forum like an elitist ******* who knows all the answers.
Granted, NoTears didn't cite his source, but so what? It's not like he trolls this forum like an elitist ******* who knows all the answers.
04-26-2006, 10:44 PM
#8
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Originally Posted by chr1s
What wrong with him posting correct info to a users question?
Granted, NoTears didn't cite his source, but so what? It's not like he trolls this forum like an elitist ******* who knows all the answers.
Granted, NoTears didn't cite his source, but so what? It's not like he trolls this forum like an elitist ******* who knows all the answers.
dare not I vex teh g0d3ss of confectionary treats
04-26-2006, 11:27 PM
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Originally Posted by Skythe
I love it when threads are filled with revelant information. I never knew that pie was soooo pretty
04-26-2006, 11:38 PM
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twin turbo and single turbo has advantages and disadvantages its not like one is clearly superior to the other... Supra tt owners are getting rid of their TTs and replacing them with a single turbo and makes rediculous power compared to the tt setup.
04-26-2006, 11:40 PM
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Originally Posted by NoTears316
Bah... his question was answered in the first reply... it's anyone else's fault for reading the rest of the thread.
04-30-2006, 02:41 AM
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You need to displace at least 2.5L and have at least 6 cylinders for a TT setup to be practical. Even then the single turbo setups are the best bet for big HP numbers.
05-02-2006, 10:34 AM
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Maybe if your 4 banger was a V, and you aligned a turbo for each bank...but even in that case I think it would be worthless with the technology of today's turbos. I think the old Lotus Espirit was a twin turbo 4 cylinder, I don't know if it was an inline, flat or V.
05-02-2006, 11:02 AM
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Originally Posted by Red Devil
I think the old Lotus Espirit was a twin turbo 4 cylinder, I don't know if it was an inline, flat or V.
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