SVT power

ClOckwOrk

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the regular contour 2.5 has different pistons, however both comes with forged rods. the cams are hollow splined units supplied by roush racing. SVT motors are slightly higher compression i think mostly because of the piston difference
 

DemonSVT

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The stock crank is overkill. It has supported 1200-1400HP.
The stock block & girdle have supported more then that.

Stock rods are sintered metal (PM rods) They have proven remarkably strong. (over 350/350 wheels boosted and past 8100rpm NA)

Stock pistons are Mahle Hypereutectic. Returnless cars (VERY late 99+) have the revised pistons and are not prone to break the ring lands under upgraded power levels. The piston revision happened late during the 2000 MY on the 3L Duratec.

All CR changes are piston related.
All Stock 2544cc = 9.7
98-late 99 SVT 2544cc = 10 (actual 10.02)
Late 99+ SVT 2499cc = 10.25 (actual 10.31)

The cam profiles were designed by Roush racing. (to prolong & raise the torque curve) The cams themselves were still made by the same supplier. All Duratec engines have hollow cams.
 

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