• Welcome to the Contour Enthusiasts Group, the best resource for the Ford Contour and Mercury Mystique.

    You can register to join the community.

Officially Shot 90k 2.5L Duratec

I've been searching old and new forums.I need a few things clarified if it's not too much trouble.

I am not going to run any boost or no2 ever so I wanted to go with a high compression NA 3.0l.

I want to use the SVT UIM/LIM, Cams, and heads (if none of that is damaged from my problem :-/ ). I am confused as to what needs to happen to the 3.0l block/heads in order to make that work. ?? Is it too much trouble for not that much gain? If the power difference between the SVT IM & heads and the 3l IM & heads is not very significant I don't think I want to spend the time and energy.

Is it best (easiest) to just put in the SVT cams and timing accessories and keep the 3l intake and heads? I have been reading that just putting in the cams is beneficial for the high end rpms, which I'm interested in. This seems relatively easy since I have to pull out the 2.5l anyway.
 
Last edited:
I love the idea of a hybrid 3L, but I am not an engine builder. Removing the heads requires fresh gaskets, fresh studs, and a specific proceedure for re-assembly. Since I'm not experienced, I prefer to leave the 3L heads on and just swap over the cams & timing gear. If you don't have engine re-man experience & want to minimize down time, I'd suggest getting somebody experienced to swap the heads or go with a port matched 3L and SVT cams & intake as I will do.

If you're using a Taurus/Sable motor, you'll be changing the timing cover anyway, so may as well swap over the timing equipment & cams from the SVT.
 
I have found a Taurus engine (not sure what year exactly but its between 2001-2003) with 14k on it. They are asking 625. . I will ask for lower.

The engine needs intake manifolds (which I have from the 2.5) and timing cover (also from the 2.5, right?).

What should i pay for that since there are no manifolds? Pretty cheap right?

I think if i got that I'd keep the 3l heads and just go with a port matched 3l to put on my intake manifolds and put in the svt cams and timing gear.

I've read that porting the oval heads to fit the 2.5 split-port leads to needing the heads completely ported. I guess this is due to the intake/exhaust ratio being adjusted when you port the intakes on the 3.0l.

Is this (below) what needs to happen?

"You have to re-work the intakes to accept the split port manifold. However when you do that you throw the I/E ratio off and it forces you to do a full port on the heads."
"No run the 2.5L intake manifolds, but for optimumn performance port the exhaust ports, chambers, etc to get the most out of 3L oval port heads. The split port hardware seems to flow much better then the 3L oval port intake hardware."

- quote by kinger

Some expert verification would be great. I'm just trying to explore my options with the 3l.

Thanks ahead of time.
 
Last edited:
Back
Top