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actually just read there web page and it looks like they give you $80 back when you send in your old throttle body so i guess its not as bad a price. question though, are we sure that the stock ST throttle body is the same size as the stock NA throttle body?
 
Ported throttle body has been done.
Exhaust - MPx Ported Throttle Body, 13+ Focus ST

It's listed for a ST, but the NA and ST use the same exact throttle body. At least one person on here has installed this on their SE; I don't believe he shared the results though.
57mm to 59mm is pretty weak, usually you go from 57 to around 61 or 62mm It's good that theres an option out there, but I wouldn't buy one for that small of an increase...on a NA car the gains would be very small, but probably make it more fun to drive with the improved throttle response
 
And if that's all you can get from machining the stock, it's unlikelly that you will have any other options unless you adapt a bigger TB from a another car to work.
 
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the more bolt on mods we get the better. i just wish it was a little cheaper. if you could snag one of these for around $125-150, even for a minimal gain, i'd be all over it.
 
why cant the old duratec parts for the previous 2.0 just fit ours! damn! we'd have so much more stuff for our cars if it did.
 
And if that's all you can get from machining the stock, it's unlikelly that you will have any other options unless you adapt a bigger TB from a another car to work.
Rumor has it that this is in the works. Adapting the tb from the mustang's 3.7l.
 
where did you hear that at?
 
Well it says lightened and forged, forged will be much stronger, a lightened crankshaft will reduce rotating mass allowing engine to rev much easier and faster and also decelerate way faster, useful for say..dirt track racing where the revs stay high... one drawback of a lightened crankshaft is in a car which is fairly heavy, it will take longer to get it going, but on the plus side, it will decelerate faster...I think I'm explaining it properly...this is a rally or race car part, you can also knife edge the crank, again a race-only mod.

A balance shaft delete kit has a similar effect, reducing rotational weight..allowing engine to rev much faster
 
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why cant the old duratec parts for the previous 2.0 just fit ours! damn! we'd have so much more stuff for our cars if it did.
If that's all your mods in your signature, you still have a few things to do..header, 2.5" exhaust, etc..
 
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Well it says lightened and forged, forged will be much stronger, a lightened crankshaft will reduce rotating mass allowing engine to rev much easier and faster and also decelerate way faster, useful for say..dirt track racing where the revs stay high... one drawback of a lightened crankshaft is in a car which is fairly heavy, it will take longer to get it going, but on the plus side, it will decelerate faster...I think I'm explaining it properly...this is a rally or race car part, you can also knife edge the crank, again a race-only mod.

A balance shaft delete kit has a similar effect, reducing rotational weight..allowing engine to rev much faster
You're close. I'm going to butcher this as well I'm sure, but I'll try.

A lightened crankshaft will accelerate and decelerate faster, it just takes more energy to keep at a given speed due to the lower rotational mass. Because a heavier rotational mass will be more resistant to change in speed, it will take longer to accelerate/decelerate but will stay at a given speed better and with less energy.

An easier example to understand would be a bicycle tire, which is similar in the overall sense of describing the forces exerted. A lighter wheel is going to help you accelerate/decelerate because it is less resistant to the changes in force, but it will take more energy to stay spinning at a specific, constant speed. A heavier wheel is obviously the opposite. (That comparison brings in a whole slew of additional considerations, but at is core is fundamentally the same.)

Some further reading-
http://www.hotrod.com/how-to/engine/crankshaft-tech-terminology/
 
So if used for racing or auto-x, a lightened crankshaft would really put a lot less stress on brakes as it would be much easier to slow down.
 
It is in certain types of racing like oval track or autocross or any racing with turns
 
Dyn085: ah... inertia, a wonderful thing.

FFhb13: Blading the crank is not just for racing. It makes it much easier to mover through the oil, plus less weight. Good for acceleration... bad for highway driving due to less inertia. Same with a lightened flywheel... good for acceleration, bad for inertia (i.e. it will affect economy where speed stays constant). A bladed crank is a very nice mod to have, but it is a big cost with all the work involved (engine removal, strip down, removal, the actual work, possible hardening of crank, balancing of assembly, refitting etc.... and would mean that you likely be adding other uprated parts in there as well lol).
 
Anytime you are talking about messing with internal parts like a crank where the entire engine may have to be pulled and disassembled you are talking big bucks...lol
 
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