skyactiv engine hp from 155 to 146 - Mazda CX3 Forum
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post #1 of 11 Old 12-21-2015, 08:49 AM Thread Starter
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skyactiv engine hp from 155 to 146

can someone explain why the the cx-3 has a lower hp rating of 146 hp even if it shares the same 2.0L engine with mazda 3 which have 155 hp? from a car review that i watched, the original manifold for the 2.0 engine can't fit the body of the cx-3, forcing mazda to fit it with a smaller version.

i am asking this because i will base my future tuning upgrades from this fact. i would like to at least bump the original output of the 2.0L to 155 hp. i also can't find a concrete literature to confirm my research.
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post #2 of 11 Old 12-21-2015, 09:45 AM
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Originally Posted by agent329 View Post
can someone explain why the the cx-3 has a lower hp rating of 146 hp even if it shares the same 2.0L engine with mazda 3 which have 155 hp? from a car review that i watched, the original manifold for the 2.0 engine can't fit the body of the cx-3, forcing mazda to fit it with a smaller version.

i am asking this because i will base my future tuning upgrades from this fact. i would like to at least bump the original output of the 2.0L to 155 hp. i also can't find a concrete literature to confirm my research.
I'm not sure why, but the main difference from the CX-3 engine and the 3 engine, is the low end torque.
In the 3 it has max. torque at 4000 rpm, but in the CX-3 it's at 2800 rpm.
So more low end torque but slightly lower high end power.

What is technical different between the two engines, I have no idea.
I'm sure anchorman can help here :-)
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post #3 of 11 Old 12-21-2015, 09:49 AM
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Quote:
Originally Posted by agent329 View Post
can someone explain why the the cx-3 has a lower hp rating of 146 hp even if it shares the same 2.0L engine with mazda 3 which have 155 hp? from a car review that i watched, the original manifold for the 2.0 engine can't fit the body of the cx-3, forcing mazda to fit it with a smaller version.

i am asking this because i will base my future tuning upgrades from this fact. i would like to at least bump the original output of the 2.0L to 155 hp. i also can't find a concrete literature to confirm my research.
I remember reading somewhere that they couldn't fit the same exhaust manifold to cx-3 engine bay.

2015 MX-5 has 160 hp but the engine is mounted lengthwise (cx-3 crosswise).
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post #4 of 11 Old 12-21-2015, 08:38 PM
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The MX-5 is RWD so it has a conventional layout.

As stated above, they had trouble packaging the 2.0G engine in the CX-3 so they had to re-design the inlet manifold. Engines are rarely rated anywhere near their maximum output to improve longevity, durability, emissions, and economy. I wouldn’t be at all surprised if they could get 200bhp or more but they tend to go for the sweet spot that gives the best balance of its attributes and that will be way lower than maximum.

The 3 is heavier then the CX-3 and they will have considered that in choosing the power and transmission ratios. Don’t forget that emissions are king in these global warming days.

Ive attached two pdf’s. One is the intake manifold of the CX-3 and the other is the 3 which is a much beefier affair. Does it make the difference between the power outputs? Personally, I doubt it.
Attached Files
File Type: pdf 3 intake.pdf (60.0 KB, 485 views)
File Type: pdf CX3 intake.pdf (424.5 KB, 543 views)
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All advice is given in good spirit and taken entirely at the readers own risk. WORK SAFELY. ©2018 anchorman

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post #5 of 11 Old 12-21-2015, 09:41 PM Thread Starter
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Originally Posted by santa View Post
I'm not sure why, but the main difference from the CX-3 engine and the 3 engine, is the low end torque.
In the 3 it has max. torque at 4000 rpm, but in the CX-3 it's at 2800 rpm.
So more low end torque but slightly lower high end power.

What is technical different between the two engines, I have no idea.
I'm sure anchorman can help here :-)
wow that sure is a big difference in torque range. this made me appreciate the cx-3 more. thanks!
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post #6 of 11 Old 12-22-2015, 06:20 PM
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I wonder if its a noticeable difference for regular driving? I have a RX8 manual before getting the CX3 and given its a high-revving rotary engine, the CX3 sure feels more peppy in city driving.
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post #7 of 11 Old 12-22-2015, 07:26 PM
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It is great having Anchorman on this forum! Clear, concise information backed with technical data. Well done.
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post #8 of 11 Old 12-22-2015, 07:55 PM
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Quote:
Originally Posted by OneLyveWyre View Post
It is great having Anchorman on this forum! Clear, concise information backed with technical data. Well done.
That's very nice and appreciated.

Thank you.
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Currently CX5 SportNav 2.2 diesel automatic and AWD.
Formerly CX3 SportNav 1.5 diesel automatic and AWD.

All advice is given in good spirit and taken entirely at the readers own risk. WORK SAFELY. ©2018 anchorman

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post #9 of 11 Old 12-25-2015, 09:50 AM
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As a matter of interest, I was flicking through the CX-5 brochure and noticed that the 2.0G Skyactive is rated at 165bhp.

Currently CX5 SportNav 2.2 diesel automatic and AWD.
Formerly CX3 SportNav 1.5 diesel automatic and AWD.

All advice is given in good spirit and taken entirely at the readers own risk. WORK SAFELY. ©2018 anchorman

“.........and another thing"
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post #10 of 11 Old 12-25-2015, 09:44 PM
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Merry Christmas to all !! It'll be nice if we could produce the same 165hp .
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