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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 11-09-2012, 08:17 AM   #1
Focus Enthusiast
Join Date: Aug 2012
Fan#: 102583
Location: Atlanta, GA
What I Drive: 2005 Saleen Sonic Blue S121

Posts: 387
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Cosworth Intake Performance feedback

2005 Saleen Focus (d20)
Manual trans

Cosworth CAI
Cosworth Intake manifold
CFM 67mm TB
draxas Header
Cat delete
custom 2.5" magnaflow exhaust

XCAL3 mail tune via Tom (great customer service) - tune is without wideband datalogging.

Car idled perfect even without a tune. The car WILL throw a P2004 and P2005 code with the cosworth intake manifold. These codes have to do with the butterfly flaps inside the stock intake. They are eliminated, along with the actuator and sensor. This needs to be turned off in the tune.

I did eliminate my Pzev system, so i did have to cap off one vacuum fitting on the cosworth intake.

So, now onto the performance. Well, with a d20, this is a LOT of air going into the engine. Off idle, the car performs about as well as it did prior to the mods. At part throttle, the car feels great. However, if I am at 1/2 throttle, the car completely bogs until it gets out of the 1900-2700 rpm range. If you give it more throttle, it doesnt help.

After 3000-3200 rpm, the car really gets going. I can feel a big difference in the 4500+ range.

Final evaluation: if you want that low end grunt, stick with a stock tb and intake. if you are into spirited, higher RPM driving, this is a good modification. I am interested to see what this feels like once i boost the engine with about 12psi.

I will have some gopro footgage this weekend. We are taking the car to the Tail of the Dragon in NC. 317 curves in 11 miles.

Suspension/brake mods:
Front upper strut brace
CFM lower 4 point brace
Racecraft springs
Eibach struts
tsw REVO wheels
Saleen BIG brake upgrade
Racecraft front swaybar

Massacre Rear shock brace
Racecraft rear sway bar
Eibach shocks
Racecraft springs

Should be fun.

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