67mm CFM TB, Not what I expected? - Page 3 - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
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DURATEC Performance (2003-2007) The place to chat about any Duratec 23, 23E, and 20 engine performance, tuning and exhaust related upgrades.

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Old 04-05-2013, 04:35 PM   #21
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That's weird. Mine felt like it had much better power in midrange but did not kill my bottom end torque. In fact I think my bottom end torque was better. Although the only bad part I found with it is that once its on and the computer relearns it will adjust for fue due to more air coming in. I put my car in the dyno last weekend and found out because of the throttle body the computer adjusted for too much fuel and now my car runs on the rich side, a little to rich to be honest. I recommend to anyone to get the car tuned when doing this upgrade so you can get the max potential power out of the part but you can also adjust the a/f better then the ecu and getting running perfect.
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Old 04-07-2013, 10:23 AM   #22
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Yup, being tuned made all the difference.

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Old 04-08-2013, 11:43 AM   #23
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Yup, being tuned made all the difference.

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Yeah I bet. Only way to get the true potential power out of any part is by tuning your car. Sucks that we have to but if we really want that power gain then we will need to tune our cars. I still cannot wait for my new motor swap. Just on the swap for the whp I am estimating 155whp on the stock motor before tuning and adding more bolt ons.
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Old 04-28-2013, 08:24 PM   #24
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well you probably lose some low end jump due to the velocity loss
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Old 04-28-2013, 11:36 PM   #25
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well you probably lose some low end jump due to the velocity loss
It really gives you more punch, great for onramps & such. I found that it was to sensitive, for bumper to bumper traffic. I'm not sure if it was the stiffer spring pressure or the geomemetry of the linkage, as I didn't have it on long. My wife asked "What'd you do to the foci"? All its going is flowing air, Its not like you bolted up a 780 double pump on a mild small block.
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Old 04-30-2013, 06:45 PM   #26
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Right now, i hate mine with a cossie intake. I gotta get with Tom and hopefully get the tune dialed in. Mine bogs so badly that I cant get out into traffic unless I have PLENTY of room. anything below 3000rpm and the car literally, will throw me forward in the seat if I give it too much gas.
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