Contour Enthusiasts Group Archives Forums Modifications Duratec Performance What is the biggest Duratec?

Is there any plans for a bigger displacement contour bigger than 3L. Is there a duratec with larger displacement? If you think the Q is Dumb, then sorry bout that.

6L V12 Duratec in the Aston Martin, and the GT90, but I doubt anyone can get their hands on one. Someone was working on a stroker kit for the 2.5 to make it 2.8-ish, and would make the 3.0 to 3.4-ish. But, doubt that is happening.

Thank you very much Mr. Hightower. And thanks for not being sarcastic!

Pretty cool that the 450 HP Astin Martin V12 is 2 3L Duratecs fused together then warmed over by Cosworth. Next biggest Duratec is the 3.4L SHO V8 - basically a 2.5L with 2 extra cylinders grafted on and warmed over by Yamaha!

You forgot the 3.9 In the Lincoln LS and the 4.0 in the Jag. Now what i want to see is the LS/Jag motor with yamaha heads. 11.5:1 compression and DEEP breathing. WOW!

The LS and S-Type motors are not Duratec. The V angles are very different, but it might bolt right up. I haven't looked too closely at my LS's V8 to see if the bolt pattern is the same as on the Contour.

Chris, The X-type Jag is a 3.0 Duratec right??? Who warmed over that one??
Joe

Jag warmed it over. Reportedly it has different heads similar to the Jag V8 heads. The Jag heads put the cams directly over the valves and the valves are directly pushed by the cams without any additional fingers or followers. The combustion chambers are also different.

I don't know which valve train system actually works better though. The Ford system provides for a lot more valve action then has even been utilized, even on the Cobra. By slight comparison, the Lincoln Mark VIII engine produced 280 HP with 4.6 litres (290 on the LSC) while the Jag produces 290 HP with only 4.0 litres, but the Jag uses variable valve timing while the Lincoln did not. In the near future when the Mark VIII engine is revived for the Mercury Maurader (and optional engine on the Lincoln Town Car) is is reported to have 300 HP.

I suspect that the two different aproaches to valve train are really nearly equalivant in power with the given stock cam profiles. Jag just needed to be different. Variable valve timing would be beneficial to either engine.

I believe another change Jag made was that they switched the water pump drive from the intake to the exhaust cam. They found that with the water pump driven by the intake cam, the cam timing could not be varied quickly enough due to the added inertia of the waterpump and pulleys.

Bob

The 3.0L in the LS IS the same Duratec that is in the Sable. The cams are a bit different as the cam is a direct bucket actuation(?) design. I forget what the Sable's is. The 3.9L/4.0L is a new motor. The difference between the 3.9L & 4.0L is that the Lincoln engine has sleeved cylinders and different heads. There are probably other differences that escape me. There was a discussion about this over at Edmunds in the LS forum.