The Ultimate 03-09 Focus Thread, SUPER LARGE AMOUNTS OF INFO.

[street_tuner87]

that depends on your point of view of it.

[honhon]

if it doesnt show up on a dyno its not helping.

and with a drive by wire, the car will only be as fast as the servo and the electrical connections.

[Egz]

Yea, don't bother. The only modification seems to be worthwhile with the ETB is to add a ground wire to the housing. But other than that, you won't get anything. My Focus builds use a stock TB. FocusSport and their 400hp STC project car used a stock TB.

[street_tuner87]

still, i had a 97 escort that i p/p'd the tb and it seemed to help. it may be small but its just like adding a large intake tube really, more airflow. idk its just an idea really.

[jetrinka]

All its been reported to do on a Focus is to increase throttle response. A dyno has never shown very reportable gains from a TB.

[grpb]

Great info!

[honhon]

Originally Posted by street_tuner87

still, i had a 97 escort that i p/p'd the tb and it seemed to help. it may be small but its just like adding a large intake tube really, more airflow. idk its just an idea really.

ok, but that escort has 12year old technology, now a days car companies are optimizing their cars more and more, so i can believe a 97 escort would see a gain, and an 09 focus wouldnt.

[street_tuner87]

thats true but wouldnt the general idea still apply though? i understand that the tech may be optimized, but seems like it opening it up just a little would still help. yes its a small mod but thats all a p&P really is, a small mod but you still see gains from it too.



i'm not trying to argue just debating in search of knowledge. ;)

[warneej]

Its mostly because the stock throttle body opening is the exact same size as the MAF tubing.

[street_tuner87]

in mine i noticed about a 1/4" to a 1/2" restriction between the tubing, tb opening, to the plate, then it goes back to the opening diameter once past the plate.