What will happen to the Earthdreams 4 cylinder and to the current 6 cylinder? - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 10 Old 08-20-2017, 06:43 PM Thread Starter
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What will happen to the Earthdreams 4 cylinder and to the current 6 cylinder?

So Honda developed these two nice engines and after 5 years (in the 9th Gens), dropped them from the Accord line-up.

In which cars/trucks/SUVs, etc (Honda and Acura) will these engines live on in?

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post #2 of 10 Old 08-20-2017, 06:59 PM
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Could the I4 be turboed for an Acura? What kind of horsepower could it make with a turbo? 300+?


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post #3 of 10 Old 08-20-2017, 08:48 PM
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I believe it will continue on in the CR-V and the ILX.

It is also the AUDM Odyssey's engine.

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post #4 of 10 Old 08-21-2017, 05:40 AM
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Interesting thoughts. Porsche offers a 2.0T and a 2.5T four cylinder engine in their Cayman. I've never driven either, but the magazines claim the 2.5T operates on a completely higher order of magnitude. The primary reason? Less boost. The 2.0T has about 20 psi off boost verses about 14psi for the 2.5T. With only 14 psi, the 2.5T has much less turbo lag. With an extra .5-liters of displacement, it has also provides more off-boost torque to still feel responsive.

I think Honda should have made the 2.4-liter their turbo. It could produce the same power (or more) with less boost. Less boost also means less heat. (Perhaps the Type R might not have overheated on track day with less boost.) Less boost also means better fuel economy when under load. If Mazda ever puts their 2.5T in their Mazda6, I think Honda could be in trouble.

If Acura ever uses the 2.4 as a turbo, it could be a huge winner.

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post #5 of 10 Old 08-21-2017, 06:25 AM
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Pilot and ridge line, plus the respective acuras for the 3.5

Was the 2013 earth dreams 2.4 a drastically different engine from the previous 2.4? I thought they just tweaked the previous 2.4 and added direct injection?

I see the 2.4 being dropped. Solid engine but they've massaged it as far as it will go. Smaller turbo 4s are the trend and the momentum keeps building. I'm assuming if Honda could have simply turbo charged it to make more power they would have but it was built as a naturally aspirated engine so I'm sure it made more sense to develop a new engine to meet regulations and have it be turbo focused from the ground up.

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post #6 of 10 Old 08-21-2017, 07:23 AM
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Originally Posted by Baldeagle View Post
If Acura ever uses the 2.4 as a turbo, it could be a huge winner.
But what would they put it in? I know it wasn't the same exact engine (today's technology could easily get 300hp or 300 lb/ft out of such an engine, especially on premium), but Acura seems to have deemed the previous 2.4T a failure and quickly dropped it on the RDX in favor of the V6. If they are smart, one of the luxury brands will come up with a 2.0 V6 with a turbo, and they will be able to charge a nice premium on it. Till this day, I don't know how BMW gets away with that 2.0T I4 engine in a 5 series that starts at north of $50K.

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post #7 of 10 Old 08-21-2017, 08:45 AM
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Quote:
Originally Posted by Baldeagle View Post
Interesting thoughts. Porsche offers a 2.0T and a 2.5T four cylinder engine in their Cayman. I've never driven either, but the magazines claim the 2.5T operates on a completely higher order of magnitude. The primary reason? Less boost. The 2.0T has about 20 psi off boost verses about 14psi for the 2.5T. With only 14 psi, the 2.5T has much less turbo lag. With an extra .5-liters of displacement, it has also provides more off-boost torque to still feel responsive.

I think Honda should have made the 2.4-liter their turbo. It could produce the same power (or more) with less boost. Less boost also means less heat. (Perhaps the Type R might not have overheated on track day with less boost.) Less boost also means better fuel economy when under load. If Mazda ever puts their 2.5T in their Mazda6, I think Honda could be in trouble.

If Acura ever uses the 2.4 as a turbo, it could be a huge winner.
The entire point of a turbo is to allow for smaller displacement engines to make up for the fuel economy. If they went 2.4T the fuel economy would drop but we would have 350HP LX accords. They could easily turbo the 2.4 if they wanted, just redesign the heads and improve the internals, but at the point it is basically a new designed engine and they didn't improve fuel mileage which was the initial goal.
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post #8 of 10 Old 08-21-2017, 08:57 AM
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I thought the "Earthdreams" is jut another variation of the K24 introduced in the Accord in 2003?

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post #9 of 10 Old 08-21-2017, 12:18 PM
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I thought the "Earthdreams" is jut another variation of the K24 introduced in the Accord in 2003?
It is, but with many changes over the K24A or K24Z:

Quote:
Honda’s first DI engine in North America, branded as “Earth Dreams,” is loaded with compelling technologies, including a forged-steel crankshaft with journals micropolished to reduce friction and a pair of chain-driven counter-rotating balance shafts located in the oil pan to offset harmonic vibrations inherent in 4-cyl. engines.

The addition of fuel being injected directly required a completely re-engineered combustion chamber and a new “dished” surface for the piston crowns to enable stable combustion and proper distribution of the stratified fuel charge.

The flatter, more compact combustion chamber reduces unburned hydrocarbon emissions and contributes to a higher compression ratio of 11.1:1, up from 10.5:1 on the previous 2.4L.

Within the cylinder, engineers set out to reduce sliding friction by offsetting the bores from the crankshaft by 0.3 ins. (8 mm), which gives the connecting rods a more favorable angle during each power stroke, boosting efficiency.

Mass was taken out wherever possible, resulting in a 3.5% reduction in overall engine weight compared with Honda’s previous-generation 2.4L.

Part of that weight savings comes from eliminating the exhaust manifold – an emerging trend for a number of new engines – and incorporating exhaust passages directly into the cylinder head.

This new design allows the close-coupled catalyst to mount directly to the cylinder head, on the front side of the engine, enabling it to heat up faster for reduced emissions. The transversely oriented 2.4L also stands more upright now, whereas the previous engine vented on the back side and slanted rearward 15 degrees.

All this technology adds up to an engine that caught WardsAuto editors off-guard for its power and smoothness.

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post #10 of 10 Old 08-21-2017, 03:30 PM
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The 2.4L and 3.5L found in the 9GA should still be found in the TLX, the 3.5L would be in the MDX, Pilot, Ridgeline, Odyssey. The ILX should get the 1.5T as it shares the same structure and base as the 9th Gen civic; same goes with the RDX. Unless if Acura throws a curve ball for the 2020 TLX with the 2.0T as the base engine, as it is more likely that they will do that. The MDX that we just bought has a nice 290 HP, as more HP would be appreciated if Acura ever does that to catch up to the market (BMW & MB).


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