Quote:
Originally Posted by eschaider
Mike,
SPF modified the chassis sometime prior to my chassis which is 2291. I believe the change involved moving the steering slightly outboard to clear the engine. When I got mine in 2006 the only modular motor SPF had headers for was the 4.6, that may have changed since then to include the 5.4. You ought to check before buying engines or engine pieces.
You will find that a Whippled 4.6 with moderate boost in the 16 -17 psi area produces about 600 RWHP by 6000 rpm which is gigantic in one of these chassis. To help put RWHP in context to FWHP divide by ~.85 which means the 'little' 4.6 is somewhere around 700 FWHP or possibly slightly more.
The most important consideration from a seat of the pants driver's point of view however is torque. The Whippled version of the 4.6 produces between 550 and 600 ft/lbs of torque from below 2000 rpm, depending on how you have tuned it. This can be difficult to hook up if you are not prepared and equally difficult to manage in turns if you are not careful.
I am not sure that a 5.4 makes a lot of sense partly because of the power available from the 4.6 and partly because you will find yourself using a lot of FGT 5.4 pieces which are staggeringly expensive.
Ed
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Ed- thansk for the info.... it is great to know one of these machines are capable of stufifng a 4.6 up front. I have the engine (4.6L terminator with 23K from an 03 Mustang Cobra... which is currently tore down and looking for a builder. Not being an expert... our conclusion is the motor suffered
oil starvation causing two of the main bearing to wear and crack one of the piston rings. why the left bank timing chain bound up is beyond us (maybe the chain tensioner) The motor was tuned with 17psi driven by a whipple. However the car (classic mustang) was roughly 800-1000 pounds heavier.
One good thing to know is there would not be a shortage of power and would truley need to respect the vehicle that much more. (probably say prayer each time the key is turned
)
Looking at your signature... I see you have a 4.6? what are your thoughts on the balance and driveability? any issues with the half shaft (CV) handling the power?
Appreciate your response
Mike