Quote:
Originally Posted by birdman941
When I had the car at Steeda, one of the techs there (Does dyno work)
drove the car and felt it had around 330-340 RWHP as it is now.
Combustion chambers have the same cc's as mach 1/Cobra heads from what I recall.
The best way to raise compression on the 5.4 32V
is to get pistons with offset pins,
as the stock setup has the pistons .120 in the hole.
A stock Navi already has flat tops and comes in at 9.65:1 CR.
Dpending on the intake, etc. you choose,
it is fairly easy to make 400 RWHP with this motor.
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i thought the navi's had bigger combsution chambers? hm.
EDIT: consulted my trusty mod motor info database. they're actually smaller than the 03/04 4.6 units. nice.
intake will be a sullivan setup(i'll be going turbo later on) and the exhaust should be Kooks longtubes. since i'll be boosting later, i'm planning on leaving the heads alone(except for valvetrain upgrades) and running some combo of stock cams(navi/cobra-still gotta research that) or maybe ford GT cams.