Zetec 2.0l Turbo

[samuelboissi]

Hi guys, I want to turbocharge my car. It is a 2003 Ford Focus with a 2.0L Zetec.

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I'm gonna buy this kit from ebay ,http://cgi.ebay.com/ebaymotors/Focus-Zetec-L4-2-0L-T3-T4-Turbo-Kit-Manifold-Downpipe-_W0QQcmdZViewItemQQhashZitem2eb13be047QQitemZ200541986887QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I will change:
-Connecting Rod
-Pistons
-Injector
-(maybe)Fuel pump

Questions:

-The turbo from the kit , is it a copy from made in china one?
-What injector should i use..?
-Is the Eagle Connecting Rod are good ?
-how many the original fuel pump from the zetec engine can take hp ?

Thanks .

[JJ]

A turbocharger needs a compression of 9:1 at maximum. The Zetec's factory compression is to high at 9.6:1.  Therefore to properly turbo charge the engine it will be necessary to lower the compression to no more than 9:1.

You will need to change out the pistons and the connecting rods. Eagle rods work well and are reliable up to 700+ if assembled correctly. I would aslo use ARP head studs to effectively seal the engine. Stock head bolts can and most likely fail with the increased heat and and pressure generated by forced induction.

Larger injectors will be needed.

[JJ]

I did a little math on you injector sizes.

A normally aspirated engine normally has a Brake Specific Fuel Consumption, or BSFC as it will be called. of around 0.5 BSFC, while turbocharged engines are generally around 0.65.

Keeping this in mid and the fact that i calculated the Max HP that you could generate with a Zetec at 15 PSI boost is about 287HP so i rounded this up to 300HP.

Then using a 75% duty cycle i like to keep my injectors around 75-80% duty cycle. I came up with this during many conversations with the folks at Ford Racing.

So the ideal injector for your turbo application is a 40lbs/hr (420cc).

Keep in mind that if you increase fuel pressure it will effect the flow rate and duty cycle of the injector.

 

[JJ]

The simple reasoning on duty cycle is that injectors also have a minimum duty cycle, not in percentage, but in milliseconds. If your motor at full power needs only a 50% duty cycle, then at idle (where it makes only ~5% of full power) is going to need about 2% duty cycle. If that 2% duty cycle is below 1msec, then your car either won't idle, or in order to make it idle at 1msec or better dwell times, it will have to run really rich.

So, injectors that hit ~80% duty cycle at full throttle mean you've got a solid chance of being able to idle correctly. If it needs more duty cycle, you're likely to start having problems with them sticking open. And if they're too big in terms of lbs/hr or cc, then you're likely to start having problems with idle.

[JJ]

On a side note Roush Racing's Turbo kit for the Ford Focus uses 38lbs/hr (399cc) injectors. So they are running about an 80% duty cycle on the injector. So you could use anything from a 38lbs/hr(399cc) to a 42lb/hr (440cc). Hope this helps.

[focusjoe91]

if u really want to get a good kit. go to www.fswerks.com i know these guys and they make awesome kits. THIS IS NOT A SPAM or anything but its up to you where u want to get your kit from and all. so check em out!