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Old 06-20-2011, 09:27 PM   #11
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Quote:
Originally Posted by hoffman169 View Post
Stock is 63 FYI
100% wrong it's 66mm
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Old 06-20-2011, 09:32 PM   #12
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The ford Svt focus technical data sheet 66mm

Sent from my DROIDX Using FF Mobile
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Old 06-20-2011, 09:54 PM   #13
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Well iv ported them before and there 63mm and the intake is a little over 65mm
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Old 06-20-2011, 10:05 PM   #14
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Maybe ford gempt us lol
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Old 06-20-2011, 10:34 PM   #15
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Read
http://www.focusfanatics.com/forum/showthread.php?t=105273

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Cliff Notes:
It is my personal opinion that there are a few "beginner mods" that anyone should follow. I say beginner mods but it would be more acurate to call them "build up mods" from NA to FI with the minimal loss in investment. (ie... less wasted money) They are as follows.

Performance Flash Tune... I prefer the SCT with the Pro Racer Package so you dont have to rely on someone else. only use this if you're comfortable with your abilities to keep it within reason. its your car, nobody else will care about it as much as you do.
Panel Filter of choice... I prefer ITG
Ported Stock Throttle Body
Highflow Cat... for the somewhat environmentally conscience.
2.5" Catback Exhaust
Gap fresh spark plugs - start at 0.065 and work your way down till you get no mis-fires.

and for good measure (aka no power gains)
Rear Engine Mount
Short Throw Shifter
Big Three - For better electrical grounds. works well with all upgrades.
Weight Reduction - Lightweight battery, Carbon Fiber Hood, Carbon Fiber Hatch, Wheels, Flywheel, Front Race Seats, Rear Seat Delete, Receiver only with only the front door speakers
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Old 06-20-2011, 11:10 PM   #16
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I was just reading that over on the jet about 30 min ago. You did a excellent job on that write up
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Old 06-21-2011, 08:43 AM   #17
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Thanks, its not really conveniently placed here. You have to dig for it. The infos a lil dated being as top speed is now making NA parts that actually improve on the svt/cosworth designs. I should update it soon... but meh
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Old 06-21-2011, 08:46 AM   #18
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Man ... this small debate makes me want to measure my TB now ... lol

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Old 06-21-2011, 08:50 AM   #19
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Take your micrometer to get calibrated before you measure to ensure accuracy and the "told ya so" factor. If memory serves me correctly, its 63mm but can be safely ported to 65. However, the flatening of the butterfly is where the (throttle response) comes from, not the diameter.

FWIW, I've actually had to uninstall my stock tb to go rescue a fellow focus owner who suffered a failure of an old FC 65mm tb. Granted, he was JRSC'd but it doesn't change the fact that I've never heard of a stock failure.
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Old 06-21-2011, 09:38 AM   #20
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i have never herd of it being 66mm, 63mm sounds about right. i looks it uphttp://forums.focaljet.com/svt-headq...body-size.html
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