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ok so what's the catch and/or what's the leverage with these GDI engines ? if the technology is so good then why didn't toyota or honda go this route ?

VW uses this technology but their reliability sucks ballz so this tells me nothing, actually it kinda worries me.

we all have warranty up the yin yang so hyundai takes the hit if it's a piece of toast....but what did hyundai do to the gdi engine that toyota and nissan couldn't do ?
 

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I think it is more about cost than anything else. The high pressure injectors and pump add significant cost which is the reason GDI has mostly been limited to up scale cars to this point.
 

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QUOTE (mayasonata @ Jul 12 2010, 11:58 AM) index.php?act=findpost&pid=341060
....but what did hyundai do to the gdi engine that toyota and nissan couldn't do ?
Or, WOULDN'T do. I have no gripe against those companies...their records speaks for themselves...but are they quick to bring new (or at least different) technologies to the forefront? I don't know.

Maybe they are still evaluating and, being conservative oriented with a "reliability trumps all" mindset, they're just waiting a bit and working on their own versions.
 

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Its just an evolutionary step in the technology of Fuel Injection.

Years ago, we had Throttle Body Injection, then in the 80s, Multi Port Fuel Injection was all the rage. Eventually more technology such as Mass-Air Flow Sensors and advanced computers modernized FI, and it got renamed Tuned Port Injection. Then in the 90s, we saw Sequential Fuel Injection which further optimized fuel economy and horsepower, and now we have Direct Fuel Injection.

I am sure in another decade or so, there will be something else which will be even better than DI.
 

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QUOTE (mayasonata @ Jul 12 2010, 12:58 PM) index.php?act=findpost&pid=341060
ok so what's the catch and/or what's the leverage with these GDI engines ? if the technology is so good then why didn't toyota or honda go this route ?

VW uses this technology but their reliability sucks ballz so this tells me nothing, actually it kinda worries me.

we all have warranty up the yin yang so hyundai takes the hit if it's a piece of toast....but what did hyundai do to the gdi engine that toyota and nissan couldn't do ?
I read somewhere 200+ engineers spent over $400 million in R&D for this engine.. But this is also the same company that developed the world-class Tau V8 so I wouldn't worry too much.
 

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And we have been replacing direct injectors & hi pressure pumps in the 6 cyl _ _ w's like crazy, for long crank starts. Hyundai's record seems allot better at this time.
I luv this motors power and it's dead smooth idle, oh yeah, it has that mileage thing too.
 

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Discussion Starter #8
whatever it is, I hope hyundai put some r and d, wear and tear abuse on these engines because I intend to keep it for a while.
 

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QUOTE (JohnMD @ Jul 12 2010, 03:57 PM) index.php?act=findpost&pid=341115
Toyota & Honda ( More so Toyota ) may be a bit gun shy trying something new in light of thier recent problems.
Toyota is still on their Synergy trip....nothing wrong with it....no one out there can claim 80mpg on their hybrid except for Toyota and their Prius. (and yes I've gotten 80mpg on a rental prius)
 

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To the OP, GDI or Gas Direct Injection is the same technology found in diesel engines but modified/adapted for Gasoline. It is more efficient since the fuel burns more completely and I think at a higher temperature. Hyundai made a decision to go this route primarily because it gives more HP or better performance than conventional engines of the same displacement which aides in fuel efficiency/economy. They engineered the car to only accommodate 4 cylinder engines which means lighter components, saving fuel.

This was a marketing and engineering decision to go this route. I am not sure of the figures but most of the Sonata sales prior to 5G were of the 4 cylinder type to begin with so adding the cost of developing a 6 cylinder engine and making the brakes, transmissions, suspension etc, components to either accommodate both or have two sets one for the 4 and one for the 6 cylinder didn't make sense since for a small percentage of buyers they would be satisfying. Also, the CAFE regulations are getting more and more strict as time goes on so the fleet average needs to rise pretty dramatically in the next couple of years.

If you ever heard of the term Eco-boost which I believe is Fords way of saying GDI this is not just a flash in the pan gimmick, this is an evolutionary kind of thing that will improve over time but likely is here to stay until we are out of oil and go to an alternative source of power. GM is going heavy into this technology as well. I would imagine Honda and Toyota are not far behind.
 

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QUOTE (Bingo Steve @ Jul 12 2010, 03:11 PM) index.php?act=findpost&pid=341125
If you ever heard of the term Eco-boost which I believe is Fords way of saying GDI this is not just a flash in the pan gimmick, this is an evolutionary kind of thing that will improve over time but likely is here to stay until we are out of oil and go to an alternative source of power. GM is going heavy into this technology as well. I would imagine Honda and Toyota are not far behind.
Steve, isn't "EcoBoost" Ford's reference to their turbo engines?

Although, maybe their EcoBoost turbo engines are also GDI, too. Not sure.
 

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QUOTE (mayasonata @ Jul 12 2010, 02:59 PM) index.php?act=findpost&pid=341117
whatever it is, I hope hyundai put some r and d, wear and tear abuse on these engines because I intend to keep it for a while.
I just read about Hyundai testing their 2.0T engines 300 hours at WOT. That's brutal. I would like to
know how many engines they test that long. Maybe only 10, but maybe 100. Can you imagine a
roomful of screaming, red hot turbos? :)

Aside from the power benefit, GDI gives engineers more opportunity for computer control over fuel
delivery. This can potentially improve "drivability" as well as power and economy. GDI is somewhat
akin to diesel fuel pumps, which can last a million miles.
 
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