There's about 3 registered owners within the myk5 club..for feedbacks its better asked there..1 is a returning owner of a k5,sold off the k5 for about a year,now returning with the GT.

Yawn... You can post tons of links based on your Google only knowledge. Volvo only said whatever to please European environmentalist. Volvo will only go all electric if EU set strict ruling that discourage people from buying diesel and petrol engine cars. Asia, America, Arab, Australia, NZ, Africa, as long as they favour diesel and petrol engines, Volvo will continue making fuel combustion engines. I see more Volvo v40 than Optima GT on the road now, how come it sells better?

Korean Failed product planning and strategies now blamed Genesis not old enough in market. Apa ini? Whatever defect and weakness with the Korean technical nowadays, people don't bother to care anymore as they have turned elsewhere. You and you fellow Korean fans can keep replying each other in Elantra thread in attempt to overtake new CRV thread, nobody bothers now. As for your claim that turbocharger operates from idling rpm instead of 1500rpm for Elantra turbo and Optima GT 1400rpm, you can play torque test with powerful Mazda 6 2.5L on the strength at 1300rpm.

Mazda 3, 6, cx5 all went through just facelift, not redesign. Don't make your own fairytale as if these are total redesigned like Sonata rise.

Civic 2011 retires in 2016, not 2015. Get your facts right. New Civic only launched in 2016. Compared to Sonata lf, new rise will launch few months after camry. If launched this year, Sonata lf only around for 2 years?

New CRV already launched, how come more crowds there compared to quiet like nothing happen over new Cerato, Elantra, Optima GT launch?

yupe, continue yawning under your own ego....

I can come out with links to refute your points because i read it before, i don't even need to try so hard to trawl google. I know you don't believe all these, and likely that you don't even care to read what was in it. It's all right, because it is for other readers to be wary of your misrepresentation of facts by your comments.

Volvo made the statement loud and clear :
- hybrid and electric lineups at the end of the decade
- they will no longer put in resources to develop new diesel engine

And this is the 3rd time i'm repeating it, they didn't say they are giving up internal combustion engines. If yes, how is it still a hybrid?

What you see on the road is not what i'm seeing, as the 2 unit of v40 i saw were the time with ford engines and transmissions. Anyway, there is no way of verifying either of our observation on this.

Outside of home market, Genesis was a car mainly catered for the US taste, Malaysia is the odd one out in the asia region selling this. In their main target market, they are picking up speed :

http://www.thetruthaboutcars.com/2017/06/h...al-predecessor/

If you want to use this argument, why honda legend isn't here? I read about it 2 years back and sounds like a car overbuilt, almost like vw phaeton. Damn taukeh type of car. Your gang should have super great ideas as it is equivalent to a 5 series/E class right?

Here, i'm specifically addressing your comment on the "activation" of the turbocharger rpm range as what you say is misleading. Have you ever tried just using your fingers to flick the turbocharger's blade and see how easy it starts spinning? And that is still without the full pressure of oil lubricating it. Normal turbochargers at operation can spool more than 100,000rpm. How much more force would the car exhaust be generating even at idle. And it also seems like you have no understanding of reading the engine power/torque graph.



I'm using the 8AR-FTS power graph used in the NX and GS as an example. The torque curve is 1650-4000rpm. If really as per what you say that the turbocharger "activate" at 1650rpm, how come the torque curve is stuck flat around there till 4000rpm and after that drop ar??? Going by your thoughts, shouldn't the torque line shoot up sky high? Below 1650rpm, the turbocharger tutup valve and exhaust gas go straight to exhaust and not spooling the turbocharger??

Did i ever said that the mazda3/6/cx5 sold here are whole new generation/redesign? By your thoughts, the new generation CX5 is lie by mazda because it has so much similarities with the current one? I'm pointing out that interchangeability of exterior parts between facelift and non facelift model is no longer a determining factor to categorise the model whether facelifted or not. As i said, you own a mazda3, just got try physically fitting the facelifted GVC headlights into yours. Let the lights do the talking.

I'll also let this picture do the talking :


This post has been edited by wkc5657: Jul 16 2017, 01:19 AM

Turbocharger comments already replied you on maxus g10 thread as per your comment there. Why post twice, afraid that I'll miss your comment there. Or wanted to save your own face?

You haven't done the torque test, why replied so soon? If you have access to Korean cars old and new, if Kia, you can take the Koup 1.6T vs Cerato 2.0 at 1300rpm to check which is more powerful. If Hyundai, you can do that with Elantra sport 1.6T vs elantra 2.0L. I bet you won't dare to post the result here because the turbo valve still closed at 1300rpm with the air goes into bypass inlet. Which means your Koup or elantra 1.6T only has the strength of 1.6L engine at 1300rpm losing to 2.0L NA engine.

Turbocharged engine, you can never get fixed output and torque reading because it varies based on situation and condition. Which is why the max torque of Elantra turbo varies from 1500-4500rpm. Are you trying to cheat customers saying the peak torque confirmed achievable at 1500rpm and you get the turbo power even at 1000rpm?

Do you know that a good diesel engine design could last 2 decades long unlike petrol engine. Diesel engine is simpler and less competition, Volvo just introduced the engine before 2010, it'll retain that design and carry forward to next models, no problem. Petrol engine is more complex that needs contant improvement in order to stay in competition. From VVT to GDi to turbocharged/supercharged, hybrid trying to improve FC and performance. Petrol engine is private car market backbone in most countries, sure must allocate more resources here. If you dodn't know, fyi diesel can be mated to EV engine too and it beats petrol hybrid far more than half.

My Mazda 3 is low spec halogen headlamp, if I fit new light FL, shouldn't be an issue. Even if high spec HID, Mazda is known to use the same part to eliminate variety and less stocks to keep. Doubt they'll give headache to owners and their own SC. Only Koreans love to make sure customers only go SC by creating lots of impractical parts that cannot share.


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Latest news, new Accord release its preview on new Accord 2018 that is scheduled for launch 1 month after new Camry launch this month in America. Based on the pace, both will reach here by Q3 or Q4. Camry powered by 2.0 and 2.5 while Accord 2.0 and 1.5T. Looks like things will get far tougher for the Koreans. These new Japanese D segments are said to come with nice ingredients, no longer empty tin can like back then. People would rather buy Camry 2.5 or Accord 1.5T entry level that priced cheaper than Optima GT. Sonata new rise also cannot rise if compared to new rivals, some more without good Strategist, without strong stance, even if Optima GT preowned throw price at Camry Accord 2.0L level also people will buy Japanese due to insecured long term ownership feel.


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Mazda is going to lose out as they haven't gone turbo or hybrid. With turbo options from other marques buyers in Malaysia are not going to buy a Mazda 6 with puny 2.0L engine or 2.5L NA engine with high road tax but less power than smaller turbo engines. Even the Mazda 3 will suffer with no turbo option. Nissan is another loser selling dated cars. Kia and Hyundai are right there competing with the Japanese with turbo and hybrid engines like the Optima GT, 2018 Sonata, i30N, Elantra Sport and Ionic. Yet you keep knocking Korean cars but not a word about Mazda or Nissan. Very biased.

This post has been edited by Ginny88: Jul 16 2017, 05:11 PM

Snap me a photo of the exerpt you read about the turbocharger "valve". I'm fine to be corrected, but please may that valve not point to the blow over valve or wastegate...

Aiyo, why so much talk about torque test. I say about exhaust spooling turbocharger, you point towards torque test?? Apa la ni?? Likewise i can also ask, why you suddenly silent about honda legend, maybe you don't even know it existed?

How many diesel hybrids out there that are on sale?? Volvo and Peugeot did that, but both silently stuttered it. And because you have no context, pretext and subtext on the diesel issue, so you won't be able to understand why diesel will be more and more unwelcomed in the consumer driving. And you have no idea on what is the cost of maintenance for the diesel exhaust after market treatment components. Any engine block, regardless of diesel or petrol, if properly maintained and done at least 1 round of rebuild will not have issues going 20 years.

In the other thread, you referring to volvo powerpulse and mazda's (not honda la) dynamic pressure turbo is it? From what you written, i suspect whether do you even understand how it works??

No need paste photo here, i know how your car looks like. Please go have a good look at you headlight against the photo of the facelifted GVC headlight.

Because he own mazda, don't want to spoil own market. Maybe when he sells off his car or somehow someone in mazda fired his gang member, then all the negativity overflows; like what he does now against the korean counterpart.

Mazda is stubborn, want to pursue something a little oddball against the market trend. It makes sense also as their overall market share in the world is small fry compared to the peers. So instead of fighting in the red ocean and lose out in most of the criterias, might as well play in the blue ocean for the select number of people who just don't concur to the mass appeal of toyota/honda/nissan.

This post has been edited by wkc5657: Jul 16 2017, 06:24 PM

Mazda already has turbo, they ventured into turbo way earlier. Mazda was known to come up with power oriented in the 90's. The Skyactiv 1.5, 2.0,. 2.5L engines can be fitted with turbo anytime as they could withstand high combustion. Mazda 3 doesn't suffer without turbo, have you checked its 0-100kmh sprint, re-acceleration, torque test, etc? It was far more impressive that you think. Mazda 6 2.0L and 2.5L already giving you the feel of being powerful instead of lethargic. The i40 with 2.0gdi engine can't even deliver such feel. Why bother the fuss when Mazda NA engine is already optimum enough?

You should ask why there's no Nu 2.0L turbocharged so far and still sticking to old theta.

Nissan car, mpv segments from what I see are failures until I don't bother to look at anymore. Yet Koreans failed to overtake Nissan so far. Why so lousy?

Since when there's blow-off valve in stock personal saloon cars designed for torque and FC? With people like you, better avoid jargon else your Google knowledge will imagine something else. Ofcourse it's the wastegate valve when people said turbocharger activate, operate, kicks in, etc.

Maybe to you, the word lag is when the turbo not yet activate eg. at 1300rpm in Elantra sport since you think it operates from engine idling speed. Just like dumb Paul Tan and CBT infected journalists who thought the same way as you do.

Diesel engine is already optimum enough with turbo, that's why they don't bother to add hybrid further unless they wanted to capture hearts of those really wanted super FC. Friend of mine elsewhere has driven Mercedes E class hybrid diesel that he rarely pumps fuel, really superb as Mercedes engine itself already so advanced that it's diesel engine challenge petrol hybrid, with added EV motor, it gives it superiority.

As for my buddies, they are busy fighting each other now after Korean car went down. I''m looking forward to see the clash of titans when new Camry and Accord launch here.

this is wow....

You're right that not all turbocharged cars need blow off valves, but those that don't use BOV must still employ some kind of diverter valve that serves the same purpose. BOV dump to atmosphere, diverter valve goes back into intake.

When wastegate operates, it means the boost already over the handling limit set in the ECU. That's why there is "waste" in wastegate, the turbine already turning so much earlier than that la....

And already told you, turbo "kick" refers to the reaching of optimal operating range of the turbocharger, also known as surge line. Depending on the model and application, the surge line will be different in line with the exhaust pressure of the applied engine rpm range. Before you hear turbo whine, the turbine is already spinning, and spinning faster than you think.

I know you won't accept that the turbine already spinning at engine idling rpm, because of your vast "insider" knowledge right? And because i'm google keyboard warrior that can't understand "jargon" right? Too bad that you have no way to prove me otherwise either because your facts are incorrect. Go ask your qualified mechanic friend Mr. How.

Anyway, this is for those that are curious :

The video started with the engine at idling :


turbo spool video during engine start and shut down :

Lol he got exposed

Wow, you already kantoi now trying to twist the topic from "turbocharger wastegate activation from certain rpm onwards" to the spool that is spin by exhaust. Really kiasu to such level to save your face. How come owners that owned turbocharged vehicles all know how to prove that I'm correct putting you to shame? Now you knew that I'm correct, quickly point to spool? If I posted how entire turbocharger works earlier, wonder what will you point to after losing? Tayar? Gather all your fellow Korean supporters here to challenge me in new Camry thread debate if got guts.

@alphaz
The one kantoi caught red handed for cheating people that Korean turbo activate from idle rpm that it could beat Japanese 2.5L NA engine at speed below 1400rpm for Optima GT is wkc5657. Most likely he never owned turbocharged car nor Korean cars yet dare to condemn Japanese cars blindly. Remind me of Korean principal and distributor staffs that personally won't buy Korean cars, don't know what is good about Korean cars yet dare to cheat people buying the cars they are selling. Best timing is Maxus g10 owner who showed wkc5657 wrong by testing his Turbocharged 2.0L.

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

This post has been edited by wkc5657: Jul 19 2017, 02:04 PM

You are just posting what I have said earlier with details taken from Google search websites. You refer my real old comment, I can post without having to refer Google.

Are you trying to prove how wrong your earlier comment was? Even those agreed with your wrong claim earlier have realised your concept that wastegate valve never closed have backed away. Now your fellow Korean supporters knew supporting you blindly just because you support Korean car is wrong. Btw, where are all the Korean car supporters in Camry hybrid thread? Don't dare to post because I got permission to post as long as my comment doesn't clash with members from the other Japanese brand.

If you compared matsuda 6 2.5L vs Optima GT, the matsuda power is fixed, guaranteed available. The Optima GT however, it depends on situation, at worse case you only get to enjoy peak torque at higher rpm and can be real weak at lower rpm.

Dude, is just a car, why you all keep on telling grandma story. Have you test drive this GT?.

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?

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. 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...

This post has been edited by wkc5657: Jul 20 2017, 01:18 PM

mazda skyactiv 2.5
peak torque : 250nm @ 3250rpm

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

Mazda 6 max torque 250nm@3250rpm on NA engine alone is something remarkable that not any engine can achieve. You can take Korean engine to compare, it can't do that. In Australia FC evaluation, the Mazda 2.5L engine beats i40 smaller 2.0L NA engine. Do you say Korean 2.0L engine fuel thirsty or Mazda
2.5L engine superior?

The real crap cheaters and liars are in your Korean companies, just like N brand, resort to lying to public to trick people into buying. Can cheat from super gearbox than power engine (instead of other way round) to turbo that support engine from idling rpm. Only lousy zero knowledge people that don't know what is good about the car they market would come up with crappy false info.

Whereas my gang members that have joined prominent Japanese brands being ethical marketing the products with facts. They brought down the Korean brands with facts. Later on, they'll clash each other with facts too.

So where are your korean gang members that are supposed to help poor Ginny who is alone attacking everyone in new Camry hybrid thread without facts. He went quiet after seeing me there? With others he was brave before that, he even used my old points to attack toyota and Honda CVT, even you too. Too bad things gone backfired because my buddies knew how to counter in reality world which led to many people buying toyota Honda CVT cars.

New Kia Rio already launched but no big news nothing at all. Launch day also cricket quiet. Engine still that old 1.4L with 4AT some more detuned to less power? Or got something new?

This post has been edited by jayraptor: Jul 20 2017, 07:01 PM


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Let him be la.
He is the smartest guy on Earth la

followed the thread till pg 13 silently. finally sifu kenny floated up
from optima GT tered become turbo discussion tered. ayam having lots of fun

By the way, who had test drive this car? I am quite eager to try it leh..

actually i didnt read la... is one of the forumer tag me..
u cant win a debate with the world smartest person right ?

oh well, it isnt a debate anyway.. its a statement