gua kantoi gua spin.....wohoo.... Did you actually properly read what i wrote?

And did i ever say that it beat the mazda or optima definitely better at that rpm range? And at that rpm range, a maximum half second lead is such a great thing to harp when my point is to clarify the fact that the turbine starts spinning since engine start. Just because of that, you start singing i'm akin to a heretic? And if you were to bury your foot on the pedal, how fast does it take for the rev to go from 800rpm idle to 1400rpm? You want to go into such a small scope of discussion, do you have the lap time reading or even a simple video? No one actually did that, because comparing engine performance is such a small less than 1000rpm band is pure joke.

Below 1400rpm, the surge line/operating range isn't reached, it is working more like a normal 2L. Not only for the optima, but all turbocharged makes. (All the points stated will apply to your new beloved honda 2.0T in the future!) So before that, sure 2.5 displacement can better chances of winning la.

The turbocharger doesn't "activate" starting 1400rpm for the optima GT, it is the surge line that is around there. Before 1400rpm, the wastegate is definitely closed, i don't need to prove that because if it is so, how are you going to build enough exhaust pressure in a linear manner closer to the surge line? If a turbocharger really worked like what you imagine, suddenly "activate" at (whatever rpm), the car will have tyre spin and the crank shaft or piston rods will definitely crack with such sudden and repeated loading.

Can't even understand simplified engine power graph, can't even understand wikipedia properly, and want to sentence me as a heretic?

kindly reread and try understand the facts and verify :
1) the effort to spin the turbocharger impeller is very very light
2) turbocharger start spinning the moment exhaust is produced, it "activates" the moment you start your engine, much earlier than when the driver can hear the distinct whine. The boost at this stage is almost none/too insignificant. Big/small, twinscroll, VGT, sequential, parallel, twin turbo, triple turbo....will observe the same, the turbine starts spinning when engine is started.
3) turbo kick/power doesn't mean the turbocharger "started"/"activated", it means the turbocharger is working at it's targeted operating condition, the surge line. It is in directly related to the turbocharger model and exhaust pressure of the applied engine in relation to the rpm. And the turbine is definitely spinning before the surge line. Taking aside engine tuning, same turbocharger applied on different a similar capacity engine, the "kick" may arrive earlier/latter because the exhaust pressure of the new engine is different from the earlier unit.
4) wastegate is to regulate exhaust pressure to the turbocharger impellers and it only opens when pressure exceeds the operating limit criteria set in the ECU. It usually opens at the higher end of the rpm, and doesn't open at all at the lower end of the rpm range. If it does, something is wrong with your car.

Correspondingly, when talking acceleration, can't just look merely at engine. Other factors come into play :
1) car weight (mazda6 2.5 is lighter by 140kg)
2) transmission ratio and tuning (the mazda has a shorter final drive ratio which aids responsiveness)
3) throttle tuning and fueling rate

mazda skyactiv 2.5
peak torque : 250nm @ 3250rpm

optima GT
peak torque : 350nm @ 1400rpm - 4000rpm

Don't know where fixed or guaranteed....

I feel very sorry for the wastegate in your engineering, really wasted....

You really want to add some more mind blowing, revolutionary, industry shaking "memorable" statements into your belt?

All i said was already properly backed up. You say i copy paste google, tapi lu tak erti pun to even prove your point. Understandable, because there is no source to prove your logic, but still so proud about it to misinform people...still cannot believe that your "engineering" is merely just yours. Oh wait....it could be something that groundbreaking?? It's alright, you can and you should continuously win in your argument. Maybe just I can't brain it, because i'm just a small ciku compared to your vast 40 years industrial "insider" knowledge right?  :thumbsup:

Now i start to understand why you and your gang are in sales and marketing, so adept in turning falsehood into something "quite reasonable" or force a statement in, just what was needed for the job! You being the most senior among them already like that, those younger ones in your gang should be even "better" i guess.  :thumbsup: Thankfully not in any higher regional or international post (or worse in technical/engineering department), or i just can't imagine the embarrassment.

Oh well, i guess i'm quite foolish because :
Sorry Kenny to drag you in, but i suddenly find this inspiring. A bit late for me to realise this though...

U miss out something
Timing belt slips all the time causing vvti not efficient
Timing chain does not slips it's better for vvti
And something regarding smell as well

Haiz, jayraptor is right. Regret buying turbo car. My car turbo not only activated at high rpm, it is also subscribtion base! I have to go Maxis to buy Maxis One Hyundai Plan and put sim card in my ECU. Every month have to pay RM188 to use the turbo. I drove out of coverage then wastegate permanently open, no turbo! WTH is this???!!!

Pretty telling for someone with revolutionary, industry pioneering, earth shattering statements of facts :
1) the +1 gear behind 4AT = 5 speed AT
2) 50kg anti roll bar
3) the everlasting olfactory goodness of conti car interior
4) the oh so light that a baby can lift the frame
5) mercedes has no assembly plant in thailand

Now can add :
- sonata new rise die die is whole new model even when hyundai HQ say it is facelift
- turbocharger will "activated"
- wastegate actually opens before turbocharger activates

无敌最寂寞...invincibly jahil 
Really 1000% totally "convinced" of this  :thumbsup:

You reminded me of this, from way back when.

He "taught" us, turbo only activate at certain RPMs. At other RPMs it is practically just sitting there doing nothing So I made this graph to illustrate his "teachings".

Just wanna make sure it's not a new invention ma, wastegate that open to "activate" tebo.

Who knows it's a new tebo design by him, the turbine is on the other side of the wastegate

 

OK so

- turbo wastegate is used to dump excess air.
- There is a valve in the plenum that opens and closes the turbo intake side, which activates/deactivates the turbo.

Got it

wkc5657 k3nnykl82 u sellman got pay attention in class anot!?

       

Even the throttle butterfly valve comes after the intercooler, not before the turbo.

We misundersood liao, it'a actually a brand new engine technology patented by Prof Jay

- Has a Plenum BEFORE the turbo
- Plenum has a valve that opens and closes to the turbo
- Has a wastegate that "dumps excess air", whatever that means. Or he simple renamed "BOV" to "wastegate".

Prof Jay what is the name of this new engine ah?

Did I twist any of your words? if yes pls correct me ah

1) Conventional torque converter automatics derive drive ratios through combination in engaging of multiple shift element groups of compound planetary gearset. 1 additional drive gear ratio is really not a simple as +1 physical gear. It is so difficult to understand that even real transmission engineer will need a piece of paper to draw out and laydown the calculation.

2) Proton did make inspira with lancer chasis components, but is the interior materials exactly the same as lancer? The wheels size pun tak sama....

3) I guess lexus also "lied" to the whole world on the GS :
[attachmentid=8983603]
[attachmentid=8983604]

Oh ya, 1 more thing regarding the 2003 vios and dugong vios, dugong vios has 50mm more wheelbase. Mana ada sama chassis? Can you fact check? Do you want to do this to yourself? Embarrass yourself again?
"valve in plenum that opens where air is drawn in by the spool on intake side"

Isn't this throttle butterfly??

Then throttle butterfly at intake buat apa for turbocharged car if the wastegate works like described?

Got mixed up with diverter/BOV which also nested at the intake? But this one for different purpose leh??

Unless his turbo got another separate air intake source la.....

Kesian never heard of Diverter Valve(also known as recirculation or blowoff) and Positive Crank Valve.

Prof Jay is getting harder to babysit lately, agree with him also Salah .disagree give him explaination he will deem u as salesman for the other party (which ever he says no good). Then he will use all his "fact" to win u based on his experience

I am impressed at u guys, still can layan him until now.

Eh, I'm no longer salesman ah?
U sure boh? U r the one whom tie me to car manufacturer previously worked... Am I fired? Sad


Eh. I just found out u also not salesman d ah?
Mana kerja now bro?

Everything you said seems to be ok until you mentioned this. Bro, wastegate is not just simple on/off trigger by engine rpm. It is a close loop control system by constantly reading input from boost sensor aka barometer. It serve to protect the mechanical components from over-stress, it can open at high rpm also when turbo pressure reach the limit set by manufacturer. Same thing at low rpm, it will close too when the engine start to let the turbo spin up. Even at engine idle it will spin up to an equilibrium point of very little or no boost.

When you lift off slightly at high rpm, wastegate go into work to regulate the pressure. When you lift of completely, intake side or cold side of the turbo get back pressure when the throttle butterfly close. Air has no where to go, this is when BOV come into the picture. Else hot side and cold side both pushing at opposite direction which slow down the turbo and create huge stress.

wastegate or blowoff or diverter all of them are pressure based. Your knowledge isn't as bad even though everyone making fun of you.

If you don't stubbornly believe to the 3 things below, I think you are pretty much doing good.
1) turbo deactivated/activated according to fixed rpm.
2) turbo not spinning at idle, only activate at specific starting rpm.
3) Turbo only get peak torque as random single point, just one specific rpm like the NA engine.

Turbo torque curve is really flat or near flat my friend in the range specified, not just one point.

Don't be stubborn already, don't need long talk of theory for this, please go test drive or do your torque test or put car on dyno yourself. You don't like Korean, you can try any German/American/Japanese modern turbo car.

I've stop visiting lyn forum due to all this never-ending argument by stubborn people who think he is right. Only until just now where my friend shared a screenshot of jayraptor rediculous "theory". Gosh man, i might get warning or something for talking something OT or flaming someone, but c'mon man. Spreading false information as if you know it, putting into words as if you know it is not helping the community at all. People with little or zero knowledge might read up to his over-simplyfied and believe it because it is easier to understand and digest, but then a false fact is still a false fact. I'm not trying to condemn jayraptor or anything, but seriously man, keep your mouth shut and learn before you comment, thats how you will contribute to the community.

*fly off with jetpack*

Wastegate do not open based on rpm. Wastegate works by vacuum/intake pressure activation. Spring setting (external wastegate determine which atm pressure to open the valve and prevent over boost. There are other ways of managing or forcefully activating the actuator by ebc or internal ecu air pump activation (some complex cars)
Wastegate is sitting at the exhaust port. It's function is to bypass the exhaust gas from flowing to the turbo and generating more boost. The part where you say it dumps air is called blow off valve. The difference in pressure for after throttle body and before throttle body will activate the valve to relieve pressure.

Damn I'm late for the party.

And for goodness sake. Turbo never activates. Electric clutched superchargers do. Turbo works on load and spool basis. Turbo spins all the time so it's always spooling. It's dimension, cfm, pressure, load, weight of the centrifugal impellers and exhaust volume plus velocity determines the rate of boost.

Common man. He chooses to believe a Thailand lancer gt broucher over a factory service manual. What can u expect. Lol

So let's say, a 1.6l turbocharged engine, the earliest the turbo "activates" is 2,500 RPM.

Before 2,500RPM it will only produce as much power as a typical 1.6NA?

Eh eh eh, u show Thailand broucher last time. No Malaysia broucher. And I show 2011 factory service manual..
Chassis code.. I know how to read dont need u to tell me

CY - lancer
CX - lancer sport back
Cz - evo

Next digit
1 - 4A92
2 - 4A91
3 - 4B10
4 - 4B11
5 - 4B12
6 - 4J10

The following digit is A for passenger car

Then
N - manual
T - cvt
R - sst

For ur info proton inspired chassis number start with
PL1CY3
PL 1CY4

PL 1 is proton plant