Turbo on the 2.4L 4 cylinder Earth dreams engine - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 54 Old 05-07-2014, 02:08 AM Thread Starter
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Turbo on the 2.4L 4 cylinder Earth dreams engine

Has anyone seen any setup a with a turbo on the 4 cylinder setup?
I do notice the exhaust manifold has just one outlet coming out the engine and that seems favorable for a turbo, but I'd definitely port and polish the head first.
How much boost can these engines hold? I've seen kits on the 8th gen but nothing for the 9th gen yet.

Also curious to know how a turbo performs when matched up to the CVT transmission.

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post #2 of 54 Old 05-07-2014, 02:33 AM
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Has anyone seen any setup a with a turbo on the 4 cylinder setup?
Nope.

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Also curious to know how a turbo performs when matched up to the CVT transmission.
Wrong transmission, wrong platform.

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post #3 of 54 Old 05-07-2014, 03:10 AM Thread Starter
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Just went through that thread and saw a bunch of flaming and nothing useful.
Someone has already boosted the v6. Maybe it's just a matter of time before the 4 cylinder is boosted.

Honda has some 4 cylinder turbo vtec engines coming (for the non- believers, pics are out).
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post #4 of 54 Old 05-07-2014, 05:47 AM
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The main problem with tourboing a stock engine is the lower end of the motor in most cases the bearings etc won't take the extra hp. Technically if you boost an engine 14.7 lbs by a turbo you are effectively doubling the hp output which is why most turbo charged engines have lower compression than the same naturally aspirated engine..
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post #5 of 54 Old 05-07-2014, 06:00 AM
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Didn't wanna spend the extra 6k on the V6.....drops 6k on turbo/tuning to have same power as V6, without all other upgrades of V6.
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post #6 of 54 Old 05-07-2014, 06:13 AM
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Didn't wanna spend the extra 6k on the V6.....drops 6k on turbo/tuning to have same power as V6, without all other upgrades of V6.
Someone will do it in the end just to be different.

Power characteristics between a turbo 4 and a NA 6 is also different.

You can build a turbo 4 to have almost max torque down low (say 2,000 RPMS).

The direct injection would serve a turbo nicely. The exhaust side of the head would promote quick spooling.

In the end it would be a lot of money to dump into what is 'the wrong platform', but someone is eventually going to do it.

Full-Race makes a similar manifold to turbo the Civics with a similar head design.
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post #7 of 54 Old 05-07-2014, 07:48 AM
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Someone will do it in the end just to be different.

Power characteristics between a turbo 4 and a NA 6 is also different.

You can build a turbo 4 to have almost max torque down low (say 2,000 RPMS).

The direct injection would serve a turbo nicely. The exhaust side of the head would promote quick spooling.

In the end it would be a lot of money to dump into what is 'the wrong platform', but someone is eventually going to do it.

Full-Race makes a similar manifold to turbo the Civics with a similar head design.
Also if the CVT could take that kind of torque, a turbo 4 under full throttle would be at full boost basically all the time when tuned right. No losing pressure for a sec as is the case with turbo manuals

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post #8 of 54 Old 05-07-2014, 08:09 AM
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That would be ideal, but I highly doubt the CVTs can hold the power. The turbocharged 2.5 Altima CVTs do not fare well.
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post #9 of 54 Old 05-07-2014, 08:16 AM Thread Starter
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Didn't wanna spend the extra 6k on the V6.....drops 6k on turbo/tuning to have same power as V6, without all other upgrades of V6.
lol. that is NOT what this thread is about.

so far it sounds very doable. start small at 6-8 psi and then build up the bottom end and boost it further. i'm sure at some point there would need to be a tear down of the cvt to get stronger parts for it.

i can work with a machine shop to build the exhaust flange. anyone want to start a project? (or should we leave it to more experienced tuners?)
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post #10 of 54 Old 05-07-2014, 08:27 AM
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CVT is not going to be a good idea for a turbo setup. Our exhaust manifold is not ideal for a performance turbo setup, but will work. It is restrictive and not really able to be modified. But, we are at 11.1 compression ratio which, I'd think, would have to be reduced...



I'd contact PRL or the handful of other manufacturers for the turbo manifold possibility. But that is such a small portion of requirements...
Different engines of course, but the exhaust manifolds are both integrated into the blocks and incredibly similar.

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Edit: actually, you can see the bulge in the manifold flange is actually opposite between the 2 cars.
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post #11 of 54 Old 05-07-2014, 09:12 AM
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\O-O/ why would u wanna turbo it anyways SMH
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post #12 of 54 Old 05-07-2014, 09:22 AM
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Full-Race Turbo manifold for the Civic.
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post #13 of 54 Old 05-07-2014, 09:37 AM
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\O-O/ why would u wanna turbo it anyways SMH
Again, different engines, but some of the turbo setups in the 9th gen Si are over 500 whp and dipping into the 11's, with thousands of miles to attest to the robustness of that engine. Different car and engine and all of course, but could indicate some possibility. Why turbo it? Because power... more power can outweigh the reasons to not do it for some. For $6k+ I'd rather try a V6 swap personally
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post #14 of 54 Old 05-07-2014, 09:47 AM
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There are too many things required to make it usable power, such as...

LSD

The cost would skyrocket in a hurry. Better off getting a BMW 335i or something similar.

(Oh shoot, just turned this into a BMW vs. Honda thread)
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post #15 of 54 Old 05-07-2014, 10:19 AM
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There are too many things required to make it usable power, such as...

LSD

The cost would skyrocket in a hurry. Better off getting a BMW 335i or something similar.

(Oh shoot, just turned this into a BMW vs. Honda thread)
I'd totally agree. But you're wrong... better off getting an e39 M5.

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