which performance parts should i go with?

[zx2srdotnet]

I never said it was easy, i just said it could be done and would be pointless

[pre98zetec]

Very pointless when they have the same power output, EGR is less polution though.

[zx2srdotnet]

and the VCT lets it cary the tq to a higher RPM

[Mustangman25]

Regardless of how the head is designed, you lost the original argument after you said that the motors are different, therefore they respond differently to different mods. A new TB or wires on a ZX2 responds differently from a new TB or wires on a ZX3. There's no point in continuing argument over it.

[zx2srdotnet]

yu keep assuming that they are 2 completly differnt motors, same block, the biggest difference is the VCT thats basicly it, intake cames are interchange able from Focus to zx2, Intake mani's are interchangeable(runner lengths are the same for zx2 and zx3), tranny's are interchangeable.. tell me what will allow a zx3 to gain power from a tb where a zx2 wont?

[pre98zetec]

Originally Posted by zx2srdotnet

yu keep assuming that they are 2 completly differnt motors

we do

Originally Posted by zx2srdotnet

Intake mani's are interchangeable(runner lengths are the same for zx2 and zx3)

You would need quite a bit of modification because focus has EGR, so it'd be a little more complicated.

Originally Posted by zx2srdotnet

,tell me what will allow a zx3 to gain power from a tb where a zx2 wont

who said that?

[zx2srdotnet]

did you read what mustangman35 wrote at all?

the FR intake mani was made for the Focus and with very little moding fits on a zx2

the early 2000 Focus Intake mani is almost identical to the ZX2 and after that all they did was go to a 2-pc design and all it would need to get around the EGR is a EGR block plate

[Mustangman25]

One place were the Focus loses power stock is at the top of the RPM range...the ZX3 can gain power from the TB because it can now take in more air that it needs at higher RPM's...VCT does this for the motor already. The Focus stands to gain power from the TB in the top end because it can breath better...not to mention throttle response at lower RPM's.

[zx2srdotnet]

the intake mani on a post 2000 focus intake mani is more restrictive then a zx2 mani so if it helped either car it would help the zx2 more

[Mustangman25]

Originally Posted by zx2srdotnet

the intake mani on a post 2000 focus intake mani is more restrictive then a zx2 mani so if it helped either car it would help the zx2 more

It seems that a new TB would let more air in into a restricted manifold...the Focus manifold is restricted, but with a new TB, it would let in more air, therefore more air would be sucked into the cylinders then stock. How can you make so many of theses claims if you don't even drive a Zetec Focus?

[zx2srdotnet]

if the manifolditself is the restriction then it doesnt matted how big the TB is, the TB isnt restricting the air, the manifold is.


Lets put it like this a hose that can flow 3 gallons of water a minute is connected to a hose that can only flow 1gal/min. Even if you replace the 3gal/min hose with a 5gal/min hose it is still limited by the 1gal hose.

so replacing the TB to say 60mm from a stock TB(lets say 55mm) isnt going to do anything if the mani can only flow 55mm, hence the problem is the mani, not the TB.

The ZX2 mani flows better then the 2000+ focus so a ZX2 would respond better then the Focus and if a ZX2 only gets 0-2whp then a Focus would get the same or less.

[Mustangman25]

I understand what you're saying...I think that we can both agree that the ZX2 Zetec and the ZX3 Zetec respond differently to mods...we could go back and forth forever with this

[zx2srdotnet]

actually if i desable my vct(just a simple unplug) they should respond exactly the same give or take 1hp difference per mod, and that rull can go for even 2 zx2's with the same mods there will be a hp difference of a couple +/-.

and according to your logic a 2000 focus will respond different to mods then a 2000+ focus due to the intake manifold change

[03Focus_Guy]

heres what i find most pointless about all this....why does the zx2 and the zx3 have different motors...the zx3 has one more door oh wow they didnt need to trade out the engine..and back to what zx2srdotnet said about mustangman's logic..the intake manifold could make more of a difference then 1hp with the same mod...if the 2000 intake is more restrictable then it wont gain as much with the same mod as the 2001+ models

[zx2srdotnet]

I said teh 2000+ is more restricted, the 2000 is on par wth the zx2, that means 2001/2/3/4 would gain less then the ZX2.
and Ford wanted to get rid of teh VCT because its not in operation at startup like the EGT so the idle emissions are higher. they originaly planed to cut the ZX2 in 2000 but the fact that the 1 version of ZX2 sold a little over half as many as the zx3/5/se and zts combined encouraged them to keep it till 03