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Old 05-19-2013, 08:00 PM   #1
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ST Sedan...

So Gentlemen,
I am new-ish to the forum as I have just been lurking for the most part. I have a 2013 Sterling Grey Metallic Sedan with a 5 speed manual. I am relatively intelligent when it comes to vehicles. I have been thinking, couldn't you just turbo the sedan using ST parts? The engine blocks are the same as far as I know. The ST is lower compression than the standard Focus, but that can be changed. Let's get a brainstorm going. I can't have been the only person to think about that...


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Old 05-19-2013, 08:07 PM   #2
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Trying to use ST parts to copy the ST might not be worth the hassle.

You can still turbo the car but the ST's exhaust manifold is integrated into the head so using the exact setup won't really be an option.

I can't really see the benefit of swapping to the 6sp... unless you just really want one. However, the MTX-75 with an aftermarket LSD would do just fine.

I'd definitely want those Recaro's though.
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Old 05-19-2013, 08:13 PM   #3
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That's the thing though. Since the compression in the regular Focus is higher than an ST, the head or pistons would need a swap anyways, so you could replace the head with an ST one. My dream for this is to have an ST Sedan. Haha. A little crazy? Sure.
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Old 05-19-2013, 08:21 PM   #4
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I'm not subscribing to the compression is too high theory. There are currently a few mazdaspeeds running in the 10.x:1 and one running on 11.x:1. In all these cases, these guys are running between 20-30psi turbo setups.

DI doesn't play by the same rules... if it did, we'd never be able to run even NA with 12:1 on 87 octane.

If there are knock issues, the can always use a water/meth kit or E-85.

As long as these tuners can get the ECU in check, I can't see why a bolt on turbo kit isn't an option.


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Old 05-19-2013, 08:28 PM   #5
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A bolt on turbo kit isn't a problem. I posed the question because I don't for see one in the future. It doesn't seem like the new Focus is a huge tuning platform. The blocks in both the Focus and ST are the same, aren't they?
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Old 05-19-2013, 08:34 PM   #6
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It might be easier to find a wrecked '13 fusion or escape with a 2.0L ecoboost and swap it. The 2.0 EB in those is only 12 hp less and has a real automatic transaxle (the 6F35)

Just make sure you get the engine harness and computer with it. You can always use the ST specific parts when you need to like the intercooler. If you find an AWD fusion or escape don't worry, all 2010-2012 fusions except the sport had the 6F35 trans, just find a fwd model and get the trans out of it.
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Old 05-19-2013, 08:43 PM   #7
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if you've got the resources i say just buy the ST crate engine from Ford Racing. not really worth tearing down the N/A 2.0L. if there are more differences in the bottom end from the standard 2.0L you'd have it w/ the crate engine. or you can buy the real ST, which is what i'd do. just not worth it IMO. ST or bust!
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Old 05-19-2013, 08:46 PM   #8
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Buying a crate from Ford is a solid plan, but buying an ST isn't an option nor is it the point. The point is to have potentially the only ST sedan. There are other issues aside from the engine itself. Like the computer...
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Old 05-19-2013, 08:50 PM   #9
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Originally Posted by Red Jay 918 View Post
if you've got the resources i say just buy the ST crate engine from Ford Racing. not really worth tearing down the N/A 2.0L. if there are more differences in the bottom end from the standard 2.0L you'd have it w/ the crate engine. or you can buy the real ST, which is what i'd do. just not worth it IMO. ST or bust!
Getting the ST crate engine might be feasible, if you can source a computer and engine harness from somewhere, and you still need to upgrade or swap the trans out.
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Old 05-19-2013, 08:55 PM   #10
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Honestly, the best way to get everything I need is to find a wrecked ST. The transmission would be swapped for the 6spd. Another thought that a friend of mine had is that since these cars are so global, the computers might actually be the same just with different options turned on/off.
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