[JamesOttawa]

The current 5.7L in the new Dodge Ram 1500 has 390 (advertised) h.p.,
while my older 5.7L (in my 2006 Magnum) has 340 (advertised) h.p.
1. What are the differences?
2. Can our older 5.7s be modified (and how?) to add the 50 h.p.?

 

[CAT3]

Normally, when a manufacturer uses the same engine and extracts more power, especially true in differences b/w truck and car, it is attributable to camshaft spec's, cylinder head finishing (chamber size, runner cc's, valve sizes), then compression.

 

[Fireman2118]

The current 5.7L in the new Dodge Ram 1500 has 390 (advertised) h.p.,
while my older 5.7L (in my 2006 Magnum) has 340 (advertised) h.p.
1. What are the differences?

The main reasons are the increased air flow due to the new cylinder head design, the new intake manifold design and the addition of variable valve timing (vvt)

2. Can our older 5.7s be modified (and how?) to add the 50 h.p.?

Um....Yeah.

My '05 5.7 puts out 450 hp (375 hp at the rear wheels)
see signature for mods

 

[B00MER]

I'd attribute it mainly to the VVT personally.

 

[RThearse]

VVT ftw!!

 

[B00MER]

VVT ftw!!

Guess regular older 5.7L Cams won't work on newer 5.7L VVT engines...

For those wondering what VVT is:

 

[57T210]

Folks,

What year did the vvt feature begin?

Thanks.

 

[Radglenn]

2010 I believe...

 

[cleary524]

2009 is when the VVT Eagle motor was released.

 

[Radglenn]

I stand corrected!