I would like to know all of the engines that can be used for the focus se. i am interested in upgrading my 2.0L engine in my 03 SE to something bigger and better so please post of what you know anything and everything. like the svt or the ford escape engine (if that even works), or the o so godly v6 swap[pray] thanks

You can make just about any engine work with enough fabricating. There are a few V8 focus's out there.

It all depends on how much money you want to spend on it.

First off, we have to know what engine you have. Both engines offered in the 03 SE were 2.0 L size. You have either an SPI or Zetec. The Zetec will have Zetec written on the valve cover, and the spark plugs go through the center of the valve cover.

Now if you have an SPI- well, I can understand wanting to swap, but with the Zetec then it's a cheaper road to simply turbocharge or supercharge that engine. Turbos make the most power.

Engine conversions are time consuming, and require a lot of research. For example, simply going to the 2.5 L I-4 Escape engine from a late model Escape will mean that you have to find another transmission as well as replace the ECU and engine wiring harness. Once you replace the ECU, you're going to have to get the keys reprogrammed or bypass the starter relay controls in order to start.

yup it is the spi engine so im looking to upgrade :) what are all of my options and an estimate of the prices?

You could just turbo the spi for not a lot of money and make some good power.

hmmm good idea but how much more power are we talking? has anyone done this and was it worth the money spent on the turbo? and how much would that generally cost for a turbo?

Now I've done some engine swaps, but not in anything later than OBD1. I'd consider a swap in a later type if I had a complete vehicle to swap parts from. That's really the most economic way to do it. You can pick up entire vehicles for less than you might imagine from either a friendly junkyard, the local classifieds, police auctions, or insurance auctions. You only want cars that have side, rear, or rollover damage. Theft damage is usually ok too. Just blown airbags from a light collision is enough to total most cars of more than 5 years age. It takes some time to find one, but that's the only way to do it IMO.

Then you have all the parts you'll need- including a new key and lock cylinders if you want to go that route instead of programming.

For turbo SPI info, start up a thread in the SPI performance. If your vehicle has more than 60k miles on it, then you'll likely need a rebuild first. You'll also want to look around to see how much it will cost for a head shop to install new valve seats as these do fall out on this engine.

Whether going turbo or replacing the engine, you should also consider what you're going to drive while you're working on this car- if you don't already have a second vehicle. Jobs like this take time, and you don't want to make the mistake of not doing the job right because you needed to "make it work" so you could drive the car ASAP.

hmmm good idea but how much more power are we talking? has anyone done this and was it worth the money spent on the turbo? and how much would that generally cost for a turbo?

jeffescort turboed his spi for like $250 and it has somthing around 190,000 miles on it now. Some guys with the turbo spi are pushing around 350 whp.