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Discussion Starter · #1 ·
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=33615&item=2427538711

As I recall, the head is different between the scorts and the foci. And I know the intake manifold side is different. But, if you remember the pics, Ive got a spare head and intake mani in the shop already. And its always nice to have some assorted spare parts around


So now I just need to watch for a tranny to build up and I'll be ready to start swapping parts. From the engine stand to the car.



For a refresher, here's the cardomain link-
www.cardomain.com/id/turbospi
 

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you can always use the escort head to experiment on before you port the foci one or just sell it.
 

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I have a set of stock springs, lifters, and seals that I'll trade you the IMRC for if you're interested. 35k miles.
 

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that's an escort motor he intends on buying jim. I could give you mine, I wont be needing it.
 

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Discussion Starter · #6 ·
Alright, 1.5 months later... The motor is mine!

It looks to be in OK shape. The intake side is all there, including injectors and a return fuel rail (oooooh). The oil pan is still intact, and theres no holes in the block with round things hangin out


So nows the time to ask. Who knows the differences between the escort and focus 2.0L SPI's?

I'm curious about:
-compression ratio
-head flow, and head interchangeability
-cam profile
-clearances on anything (actually lack of clearances)
-intake manifold (its clearly different, but is it better? (and will it fit)
-Accessory mounts
-I remember reading the valve cover is different. How so?

Thanks gang.
 

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supposedly the spi scort has like a 9.2-1 comp ratio and we have a 9.35-1 ratio if I remember right. Still don't know know where the difference is if it's the pistons,chamber or head gasket. It's a very small difference and not a big deal.

I'm pretty sure the heads flow the same but you can't use the escort head on your focus. It doesn't have the bolt holes in the side of it to attach our drivers side motor mount to and there is no metal in some of those areas for the correct holes to be drilled and tapped.

Escort coil mounts differently to the block than the stock focus one does. I'm gonna find out if the escort bracket fits on the focus head since it just looks cooler that way.


I think the cams are the same.

Valve cover is different, the escort one is like an inch lower than the focus one. We have the pvc valve/ with baffling for it underneath our valve cover and also the vent as well. The escort one only has a vent in it since there pvc comes out of the block through that black metal oil seperator that you will find under the exhaust manifold. If you are running a turbo and want to ditch the pvc than an escort cover would be the way to go.

That's all I can think of right now.
 

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Gig, I don't know the all the technical terms, but I'll do my best: I thought the cams wouldn't interchange exactly due to some thingy on the side of that one part that was different so the other things wouldn't read it (techincal term: Top Dead Center) correctly therefore making other things that check the the part not read the stuff right making the thing mess up.

I could be wrong though.


Maybe that was just teh cam GEAR....
 

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The SENSOR, huh? Well, why don't you just keep showing off your vast array of technical vocabulary?!

J/K! That may be it. I just recall some peeps discussing that something wouldn't read the same. Probably the sensor, but I thought that a part (either the cam itself, or the cam gear) had some sort of notch in it that isn't the same, so it wouldn't be read correctly....

...nevermind. I'm going to bed. I have teh suxors at smartness.
 

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I was worried about there being no cam postion sensor on the older 1.9 escort camshafts not the 2.0 spi ones.
Turns out the older ones have it anyway so nothing to worry about.
 

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I knew SOMEONE would understand the technical jargon I was flinging around.

Sorry to interrupt the post, just checking to make sure, though.

Toodles!
 

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Discussion Starter · #14 ·
If only I knew the true meaning of this title when I first posted.

Tonight I finally found time and motivation to heft the motor up onto the engine stand and start tearing it down.

The plan was to rip (gently) off the head and ship it off to Iscort and drop my focus head on, bolt on the turbo and then stare in awe for a while.

The first thing I noticed was the oil smelling a little nasty. Second thing I noticed was when the head came off. There were metal shards lying on each of the pistons. I thought... hmm, that doesnt seem right. I flip the head over and see pit marks EVERYWHERE from the shards. Looks like just what that article I posted talked about... the valve seats busting up and causing chaos.

So anyhow, Iscort, this head isnt worth shipping to you. I guess I'll use it as porting practice, and try and get some of my money's worth out of it.

I also get to rethink my "expendable turbo motor" plan now. The block is miiiiighty iffy looking. The cyl walls didnt get messed up somehow, and theres minimal damage to the piston heads. I'll pull the oilpan tommorrow and see how it looks down there. At this point tho, I wouldnt be suprised to find a squirrel or something.
 
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