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So you want to use a Duratec/MZR?
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Author:  Scottmkiv [ February 13, 2013, 8:31 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

When looking for a donor Ranger, does it matter if the truck is an auto or manual?

I'm thinking about using a Miata 5 speed anyway.

Author:  BBlue [ February 14, 2013, 8:32 am ]
Post subject:  Re: So you want to use a Duratec/MZR?

John, my engine is a Ranger. From a practical standpoint, I've decided that while oil pan clearance is important, for normal installations there is not much to be gained in making it a lot more than bellhousing clearance.

My engine was for an automatic. The only problem was length of flywheel bolts. They were a couple of mm short for the stock manual flywheel, nothing that a $50 set of bolts (OUCH!) did not cure. If your going to use the OEM automatic 'puter, you might run into issues.

Marcus, engine weighed 235 pounds with motor mounts, stock flywheel and clutch. My weights have to be correct, they were made with the same brand of bathroom scale as the one in the photo! Fortunately, the weights are very compatible.

Bill

Author:  a.moore [ February 19, 2013, 5:59 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

john hennessy wrote:
Andrew, how deep is the pan with the hole in it?


From the flange where it mates to the block to the lowest part of the pan it is about 4 7/8". Mine is actually a little lower thanks to the "modification" but you get the point.

Author:  john hennessy [ February 19, 2013, 9:05 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

andrew,

which side of the engine is the dip stick, mine is on the exhaust side

Author:  a.moore [ February 19, 2013, 10:18 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

This one is on the intake side.

Author:  BBlue [ November 19, 2013, 8:39 am ]
Post subject:  Re: So you want to use a Duratec/MZR?

The 2.5 has the dipstick going through the head, between #1 @ 2 on the intake side.

Bill

Author:  Driven5 [ November 20, 2013, 2:05 am ]
Post subject:  Re: So you want to use a Duratec/MZR?

BBlue wrote:
The 2.5 has the dipstick going through the head, between #1 @ 2 on the intake side.

Bill
Interesting. Any chance you would be able to get some pics and detail any other differences you've found so far? Like is the height of the block itself the same as the D23? Is the head and/or valve cover taller? I believe at least the intake ports (and maybe exhaust ports too?) are supposed to be a fair bit bigger than on the previous Duratec's, but I'm curious to what degree?

Author:  BBlue [ November 20, 2013, 10:49 am ]
Post subject:  Re: So you want to use a Duratec/MZR?

Justin, this is what I can determine.

The valve cover on the 2.5 is about 1/4" taller than the aluminum valve 2.3 cover. The overall height of the 2.5 is 26.5" to the top of the "710". Can't really measure the 2.3 overall. The oil pan on the 2.3 extends 1/2" lower than the 2.5.

The front pulley on the 2.5 extends 2 1/4" from the timing chain cover. The 2.3 is 1 3/4", too the head of the crank bolt.

The crank pulley on the 2.5 is 6" diameter. 2.3 is 5 1/4"
Water pump pulley on the 2.5 is 4 1/2" diameter. 2.3 is 4 1/8"
Intake port height is 1.550 vs. 1.450. Width is the same.
Exhaust ports are identical

For anyone interested in using the stock exhaust manifold, the 2.5 has 1.560" diameter primaries, slightly larger than the ports. 2.3's are 1.375". Both are very nice castings. The stock intake runner length is 10 1/2" for the 2.5, 16" for the 2.3. The 2.5 runners are obviously larger in diameter, but actual measurements are beyond my capability.

The 2.5 throttle is drive by wire. As near as I can determine, the injectors have the same flow ratings. I think that is very interesting. Here are the respective part numbers:
2.5 - 280 158 162
2.3 - 280 156 155

Here is a top photo
Image

Bill

Author:  a.moore [ November 20, 2013, 10:58 am ]
Post subject:  Re: So you want to use a Duratec/MZR?

BBlue wrote:
2.5 - 280 158 162


Is it definitely 158?

Only reason I ask is my 2007 2.0 came with 0-280-156-162 injectors and I had a heck of a time reading if it was a "6" or an "8" when I was researching the specs.

Somewhat unrelated but I found these two sites useful when I was setting up the MS to use the stock injectors:
http://users.erols.com/srweiss/tableifc.htm
http://www.fuelinjector.citymaker.com/F ... Rates.html

Author:  BBlue [ November 20, 2013, 1:30 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

a.moore wrote:
BBlue wrote:
2.5 - 280 158 162


Is it definitely 158?




Yep. No doubt about, used a magnifying glass. Very clear under magnification.

Bill

Author:  BBlue [ February 25, 2014, 12:16 am ]
Post subject:  Re: So you want to use a Duratec/MZR?

I'm trying to find the 2.5 redline. Ford says max hp is at 6000, lets it rev to 6500. Is there anymore left?

Bill

Author:  Beardy [ April 7, 2014, 11:44 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

Can anyone confirm whether there are any solid OEM flywheels for the Miata / Mazda/ Focus and which ones might interchange?
I dont want a dual mass anchor and I am looking to avoid paying for a Fidenza..
I know that the UK Fiesta ST (Duratec 2.0 / IB5+ gearbox), uses a solid flywheel for example.
bu there also seem to be several different starter motors # of teeth , different diameters etc.

thanks

Author:  Driven5 [ April 8, 2014, 12:08 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

Beardy wrote:
Can anyone confirm whether there are any solid OEM flywheels for the Miata / Mazda/ Focus and which ones might interchange?
I dont want a dual mass anchor and I am looking to avoid paying for a Fidenza..
I know that the UK Fiesta ST (Duratec 2.0 / IB5+ gearbox), uses a solid flywheel for example.
bu there also seem to be several different starter motors # of teeth , different diameters etc.
I believe that the native RWD (06+ Miata and 01.5+ Ranger) use a solid flywheel. The Miata being the lighter of the two. My understanding is that most of the FWD applications use a 'dumass' flywheel stock. Not only are the ring gears different between variants, so too are the setup heights and offsets. So a stock 06+ Miata flywheel will not interchange with a stock 01.5+ Ranger flywheel, and neither of which will interchange with a stock 03-07 2.3L/05-11 2.0L Focus flywheel. Thus your flywheel options will be more-or-less predetermined by your transmission selection.

Author:  Beardy [ April 8, 2014, 12:24 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

Many thanks Justin,

Starter motor goes with bellhousing, so flywheel is determined by tranny.

Not good for a middy then; looks like I will have to shell out for an aftermarket jobbie.

None of the Mazda range use a solid I suppose?

Author:  Driven5 [ April 8, 2014, 2:51 pm ]
Post subject:  Re: So you want to use a Duratec/MZR?

I don't know for sure, but the Mazda's also use a different transmission than the Focus. So chances are high that they too use a different (non-interchangeable) flywheel. Exedy offers a complete clutch/flywheel kit including solid flywheel for Fidanza flywheel money.

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