Duratec / Mazda L-Series MZR I4 2.0 / 2.3 / 2.5 Swap

[DPDISXR4Ti]

Been thinking the 2.0 Duratec might be good enough for those not looking for a big power setup. One advantage is that the 2.0 block is about a 1/2" shorter than the 2.3/5 block, which might be helpful when fitting a MZR under a Merkur hood, Scorpio or XR.

The Focus would far and away be the most common 2.0 donor. You'd most likely want to be looking at the 2005 - 2011 Focus. The "new" 2012+ Focus is Direct Injection, which presents more challenges when swapped.

I had been under the impression that all the 2005-2011 2.0 Focus engines were the same, but it appears that may not be the case, as outlined here:
https://sbdmotorsport.co.uk/product/dur ... formation/

In short, the 2008+ heads have a high-port design which should flow a little better. The high port castings numbers are RF3S4G (AKA 3S4G) and RF6S4E (AKA 6S4E). The earlier (low port) head is the 1S7G. Note, this info comes from the UK and may or may not be exactly the same in the US.

[my8950]

Been thinking the 2.0 Duratec might be good enough for those not looking for a big power setup. One advantage is that the 2.0 block is about a 1/2" shorter than the 2.3/5 block, which might be helpful when fitting a MZR under a Merkur hood, Scorpio or XR.

The Focus would far and away be the most common 2.0 donor. You'd most likely want to be looking at the 2005 - 2011 Focus. The "new" 2012+ Focus is Direct Injection, which presents more challenges when swapped.

I had been under the impression that all the 2005-2011 2.0 Focus engines were the same, but it appears that may not be the case, as outlined here:
https://sbdmotorsport.co.uk/product/dur ... formation/

In short, the 2008+ heads have a high-port design which should flow a little better. The high port castings numbers are RF3S4G and RF6S4E. Note, this info comes from the UK and may or may not be exactly the same in the US.

In my head, I can't have an XR4ti without a 4 cylinder turbo. That is why I was thinking new duratec ecoboost...I am not sure of how the older versions would be turbocharged, I am sure it is possible, but more research. Please figure it out and let me know! Just kidding, but I appreciate all that you are doing here regarding research.

[DPDISXR4Ti]

In my head, I can't have an XR4ti without a 4 cylinder turbo.

I get that. I'd be looking at the MZR swap into a Scorpio. Simplicity and reliability would be the paramount concerns given that my wife drives the car more than I do. As such, N/A it would be.

I haven't studied this much, but I think I've read that the stock 2.5 internals stands up to turbo-charging better than the 2.0 and 2.3. I'm not sure what the limits are, but I'd guess you could easily get to 250HP on an untouched junkyard engine just by bolting parts on and limiting boost to maybe 8 lbs.

[DPDISXR4Ti]

These guys make a bunch of different Individual Throttle Body (ITB) kits for the Duratec engine. You'd want to enclose them in some sort of filter/plenum that supplies cold air rather than hot under-hood air.

https://store.jenvey.co.uk/throttle-bod ... -ford-kits

[bobsright]

Back to transmission choices, wouldn't the Mustang SVO 5 sp work and be a better choice than a Ranger truck tranny? I would have to think that gearing and even the syncros would be set up for truck situations as opposed to quick shifts and off the line performance.

[DPDISXR4Ti]

Back to transmission choices, wouldn't the Mustang SVO 5 sp work and be a better choice than a Ranger truck tranny?

Currently there is no bell available to mount a T-5 directly to the MZR. One did exist in the past from Quad4rods, and one may exist in the future, but today, no.

[DPDISXR4Ti]

Here's a China-cheap intake manifold...

https://m.alibaba.com/product/160050703 ... 00x200.jpg

It appears to be a knock-off of this one...

DESCRIPTION
New intake manifold from 1 Goal Performance. Fits 2.0L and 2.5L engines (setup for the larger port of the 2.5, but will work well with the 2.0 after you port match the head).
https://www.good-win-racing.com/Mazda-P ... -2510.html

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[DPDISXR4Ti]

As I stumble across things I'll try to post them in this thread for reference. Here's a stock 2.0 Duratec fuel rail modified for 8AN fittings (SS fittings TIG-welded). That should make for an easier time when plumbing in custom fuel lines.

DuratecFuelRail8AN.jpg (457.33 KiB) Viewed 33 times

[DPDISXR4Ti]

From Rens in the Netherlands. Some mods to the oil pan and X-member to fit a 2.5 into a Sierra. I believe this is the Ranger pan.

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