Duratec 2.0 Vs. Zetec

[1-t]

Looking for a comparison between these two engines. Anyone know of a good resource?

 

Thanks

 

Scot

[11Budlite]

Scot - Here's one for a start: http://www.californiacaterhamclub.com/chat/archive/index.php/t-133.html

 

And another: http://www.blatchat.com/T.asp?id=45386

 

You can google "zetec vs duratec" and find lots of info.

 

I think the general consensus is that the Duratec is a more modern design that is lighter because of the alloy block, has more power potential because of the better flowing head, but has the intake and exhaust on opposite sides to the Zetec. Most of the guys that are upgrading crossflows go with the Zetec because it's an easier conversion because it keeps the intake and exhaust on the same side. Those that have a new build and have a choice between the two would prefer the Duratec...I know I would! That said, I'm very happy with the Zetec in my Birkin. It's a great motor!

 

Bruce :7drive:

[1-t]

Thanks, that is just what I was looking for.

 

Scot

[slomove]

Some direct comparison data attached (mostly dyno'ed the same day on the same equipment).

 

I summary: a stock 2.0 liter Duratec on TBs and with aftermarket ECU is roughly comparable with a similarly equipped 2.0 Zetec with stage 2 cams (ZX1, ZX3 or SVT doesn't seem to matter). But it is a few pounds lighter and parts in the long run probably more accessible and cheaper. You may want to make your choice based on the ease of fit in the target car.

 

The Cosworth Duratec and similarly tricked out engines are in another league but heavy on the wallet.

http://www.usa7s.com/aspnetforum/upload/394360751_EngineComparison.jpg

[pi7ot]

If you have the option, the Duratech has more performance potential, plus it's easier on the ears(off side exhaust.)

 

m

[oilteq]

And it is my understanding that the Duratec will bolt up to a MX5 6-speed transmission.

[JohnCh]

And it is my understanding that the Duratec will bolt up to a MX5 6-speed transmission.

 

True, but Mazda gearboxes are a little bulky, so depending on the car, the 6-speed may not fit without chassis modifications. The 1st gear in that gearbox is also really short. At 3.815 it is even shorter than a stock Type-9 1st gear (3.65) which, speaking from personal experience, is absolutely useless with a Duratec. They do shift great though.

 

-John

[manik]

John is correct, the Mazda 6-speed gearboxes have pretty poor ratios for a 'Seven'. In actuality, the Mazda 5-speed boxes work really well, and only require a minimum of modification to mate up to a Duratec. Just beware the width of the Mazda gearbox case!

 

 

tom

[scannon]

John is correct, the Mazda 6-speed gearboxes have pretty poor ratios for a 'Seven'. In actuality, the Mazda 5-speed boxes work really well, and only require a minimum of modification to mate up to a Duratec. Just beware the width of the Mazda gearbox case!

 

 

tom

 

Mazda 6 speed gearboxes have pretty poor ratios for a Miata as well. Many Miata owners "downgrade" to a 5 speed.

 

I have a 2000 Miata 5 speed in my Caterham and it took some serious reworking of the tailshaft housing to make it fit in the very narrow Caterham tunnel. I also had to remove a little metal on the bosses on the sides of the main transmission housing. The middle of this page shows what I did to the transmission to make it fit.

 

That said, I don't know if the Duratec powered MX-5 uses the same transmission as the '00 Miata transmission or if the '00 transmission can be bolted to the Duratec engine.

 

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