Honestly I'm pretty lazy to reply this as this clearly shows your lack in technical knowledge. But since it is already 5am in the wee hours and I need to waste some energy in order for me to sleep, here's my post.
What you need to know about pressure and density? Ideal Gas Law? Boyle's Law? Charle's Law? Seriously? And talking about intake, you say straight air intake won't draw in as much air as a 'bent' air intake? Those 4age's 1600cc are pushing more than 200hp with that setup and you're telling me it's not drawing enough air? Let's go to Jet engines then, direct ram air intake. Anything to say about that? It's still basically a 4 'process' engine as it still requires intake, compression, combustion and exhaust, just that it does it all at once. Air is sucked in direct from the atmosphere and it makes use of the ram effect at high speeds and altitudes.
You're saying the efficiency of a 2.0 NA will always be better than a Turbocharged 1.6L with the same power as a 2.0NA. Seems like you're missing the knowledge about volumetric efficiency here. Turbocharged cars will always be more efficient than NA engines as the turbocharger is harnessing energy from the exhaust which on an NA engine will be wasted, then using that energy and compressing air, forcing air into the cylinders, increasing it's volumetric efficiency. About FC, as long as you drive in vacuum during normal town drive your FC will remain the same or even better than when NA, and will definitely be better than one with a higher cubic capacity.
Reason we're comparing with a Vios is because the Vios is basically in the same category as a Forte, a basic everyday-drive point A-B car. If a Vios can be turbocharged, why not a Forte?
Yes I do know the function of a twin scroll and VGT, I'm just afraid that you don't. Seriously you're making a fool out of yourself saying 'wastegate-type' turbochargers are old school tech.
ALL turbochargers used in petrol engines needs a wastegate else the boost level will just climb as the RPM increase until the engine kills itself from overboosting.
The way you're describing 'turbo lag' is as if you're describing a supercharger. Activates and deactivates? Bro, a turbocharger spins even when the engine is idling. When a turbocharger starts producing usable boost is a whole different thing, it doesn't 'activates' and 'deactivates'. Newer technologies can start producing usable boost at an earlier RPM than older turbo's with older technologies and hold that boost throughout a longer RPM range than an old-school turbo, but the way you describe it is totally wrong. What vents for low pressure and high pressure? All VGT does is changes the A/R ratio and exhaust flow in order to compensate for low-rpm and high-rpm driving thus creating boost at a lower RPM and then changing the nozzle angle to accomodate higher RPM operations. Some VGT Turbo's in Diesel applications do not require a wastegate as they don't rev that high anyways and does not produce that much gas flow but most petrol engines do. Volvo's VGT turbo's does have a wastegate built-in and a twin-scroll turbo definitely have a wastegate built in. They're taking technologies that had been long used in the aviation industry in jet engines and finally putting it to use in the automotive world.
For those who don't know what's VGT,
HERE'S a simple description on what VGT is. For twin scroll, it divides the cylinder exhaust gas, thus seperating exhaust gas pulsations and improves the scavenging effect in a 4-stroke multi-cylinder engine. And yes there are also split to a small and large turbine for lower and higher engine rpm efficiency.
About your last paragraph, so basically a bolted-on turbo engine will die because it would choke the engine, eventhough with a turbo you're basically forcing air in? What a joke. I do agree that the wear and tear in a turbo engine would be slightly higher than an NA engine but with proper maintenance, both NA and turbo engines will last pretty damn long. What cleaning in specific are you talking about? Throttle body cleaning? top overhaul? Engine bay cleaning(LOL)?
Before you comment any further, do share what car are you driving and what car had you driven? Plus what had you modded on your car(or any cars) in that aspect? I see you have an atrocious reputation in AutoWorld forum i see
Anyways, good night.
exactly what i had in mind. lol. to add on, VGT and twin scrolls turbos do not eliminate turbo lag, they only minimise it. there is still turbo lag no matter what. and when jayraptor said turbo "activates" after 1400rpm in his pug508 example, that's turbo lag before 1400rpm. and jayraptor, do u know this puny VGT turbos has it downside too? they tend to lose their breath earlier when approaching redline?
Jul 23 2013, 09:28 AM
Quote
0.0238sec
0.62
6 queries
GZIP Disabled