Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec Cut and Dry - which kind of hybird (or straight 3.0) is better

I have read all the posts, done the searches, but no one puts it out cut and dry.

What will flow best. Take all the combinations of 3.0 heads (all years) and 2.5 heads (svt and non-svt), as well as all possible Upper and Lower intakes from both engines for all years, and all the different cams.

Now which system will flow the most air at the best velocity. I don't care about hood clearance issues, I just want to know what is the best setup.

What I *think* is the best, but I'm sure someone will correct me is:

2001 or better 3.0 heads
3.0 valves
SVT cams
SVT LIM
SVT Dual Honed UIM (although that wall after the TB kinda bugs me)

btw: i would rather build an engine that makes HP at mid-high rpm.

Until I see proof for another option I will be doing this:

3L Short Block
2.5L Heads (Aggressive Port and Polish) with 3L
Valves
SVT or Custom Reground Cams
SVT LIM
SVT UIM
65MM TB

I feel that if you are going to build up a 3L, you my as well have your heads P&Ped to free up even more HP.. It will be worth it in the end...

Nikolas

I like it...

My thoughts are very similar, with the exception of the heads and LIM. The new 3.0s have 1 oval port per cylinder rather than 2 circular ones. Of course I have no evidence to what actually flows better, but I know of at least one race motor with its intake ports 'siamesed' for better flow. Just thoughts. Mid-to-top end power is also my cup of tea.

Oh, and I mention the 3.0 heads because it's less prep, plus the 10:1 compression is fine, because I would plan on adding +/- 50 shot of nitrous as well. 11+:1 would not be fun for long.

Here are my specs that will be dynoed in the next month-

98 3 liter block and heads
SVT cams, lim, uim
custom rods (stock size)
vortech S/C with smaller pulley
42 lb injectors
65mm TB

Hows that sound?

Hmm, no shortage of fuel I'm sure!

Are the stock rods weaker than the pistons? How much boost are you going to run with? Any bets being made yet on what that puppy is going to put down?

42 pounders Think you'll need that much fuel? What else you plan on doing with the fuel delivery, new pump and lines to deliver enough to those badboys.

I am gonna stick with the 24#'s that come with the 01 3L, if push comes to shove I can swap them out at a later time.

well im goin to the dyno on weds and i can show you what a 3L with 3L heads ported and polished with svt cams svt lim/UIM can do. The rest of car is stock except kkm.

Ok i know the 3.0 lim is siamessed what about the heads, at what point to the go back into two ports for valves, right where it meets with the lower or a little bit down thanks to a nice split, basically what i'm asking is going from the lower to the heads is it nice and smooth?

Buckshot, everything looks good but that TB. Is that going to be big enough?