HLN A55

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Something I've been interested in researching...

Apart from the obvious difference in engine design (ohv vs ohc) what about the Ford 4.6/5.4 makes it so dependant on forced induction in order to make power??? The 5.7 as we all know make prodigious power with comparatively simple modifications and yet the Ford followers rely on supercharger pullies etc... to keep up. I've heard some generic comments on the topic but I've already cocluded the LSX is a better motor all around :D. I was hoping for something a little more descriptive if possible??

Cheers

Tony
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Riley P

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Total speculation, but maybe they rely on force induction so they can have relatively mild engines 98% of the time and a fire breather 2% of the time when you need it and the induction system actually starts putting air through it.

I am curious to hear the real answer as well.
 

HLN A55

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From the reading I've tried to do, they don't really consider any hope of the same normally aspirated power outputs as the LSX motors. Interesting...
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I do not remember the link,but i was reading the 2011 Mustang will have an all new 5.0 making 415 natural horsepower,that's getting very impressive numbers for the size of the motor.
 

HLN A55

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the interesting part is also partially the reason for the initial question. :D WHy the whole new design just to make 415 ponies? bad block? cylinder head design?

interesting....
 

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Parts are too expensive on the 5.4/4.6? Maybe it is to cut down costs? The high HP motors are used in only a few special models so instead of doing a whole bunch of R&D making new parts and trying to find what parts work together to make good power, you can just add some forced induction and giver beans without having to fabricate a whole bunch of new molds/castings/parts and spend time machining, blah, blah, blah. Was that one sentence? Awesome.
 

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