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Old 02-03-2010, 06:49 AM   #1
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Difference between MAzda 2.3 and Focus ST motor?

What is the difference between the MAzda3 2.3 liter motor and the 2005-2007 focus ST 2.3 motor?

Thanks!

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Old 02-03-2010, 07:28 AM   #2
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Not much, but the biggest difference is the Mazda has VCT. There are a lot of tiny changes as well. (like an electric power steering pump)
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Old 02-03-2010, 07:33 AM   #3
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^^^what he said.... variable cam timing and certain accessories but thats pretty much it.
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Old 02-03-2010, 12:22 PM   #4
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and the ford 2.3 in the STs has VVT if I recall right
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Old 02-03-2010, 12:35 PM   #5
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the ford versions of the duratec 20 and 23 are VVT-less IN THE FOCUS, that is why they have slightly lower hp and torque ratings than their mazda versions. the duratec 23 IN THE FUSION AND MERCURY MILAN are equipped with the VVT system
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Old 02-03-2010, 12:42 PM   #6
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Quote:
Originally Posted by JustHereFTM View Post
the ford versions of the duratec 20 and 23 are VVT-less IN THE FOCUS, that is why they have slightly lower hp and torque ratings than their mazda versions. the duratec 23 IN THE FUSION AND MERCURY MILAN are equipped with the VVT system

Correct.
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Old 02-03-2010, 11:18 PM   #7
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alright, I knew some 2.3 had VVT
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Old 02-04-2010, 11:08 AM   #8
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yeah, and that fact still annoys me to this day! really wish the ST had the vvt.
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Old 02-04-2010, 08:50 PM   #9
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^^ why? it adds complexity at what expense? 7-10 more hp and 6 lb.-ft. of torque (and even thats debatable due to the SAE changing horsepower measurement procedures in '06)? 1 MPG better in the city? a claimed "more linear" torque curve? that version of VVT is kinda useless imho
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Old 02-05-2010, 09:13 AM   #10
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lol, every reason you just stated is reasons i want it!

i mean, you just said '7-10 more hp' like it was nothing...when people drop 700 bucks on tunes (w/af gauge) and take on the added cost of higher grade fuel just to get maybe 5hp!
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