THUNDERXx

My truck bone stock made 261 at the wheels. With the small bolt ons it probably picked it up 30 hp. It should put out around 300 at the wheels is what I'm hoping.

George C....

Shorties dont flow anymore then stock

Cai dont always gain you power

Exhaust doesnt always gain, in some cases loses power

Also many will give you the STD numbers which read higher so reality your not over 300rwhp

THUNDERXx

Dyno yesterday went great!! Truck made 305 at the wheels 310 torque. So its not just a "stock truck".

George C....

Gained 40rwhp


Post up sheet

THUNDERXx

George C....

Sorry to bust chops but STD typically reads 20 higher then SAE

So 280s is about right

Fast355

Even that is generous! Put it on a properly calibrated Mustang dyno and it wouldn't crack 260.

blownescalade62

+1 agree

TXsilverado

iTrader: (19)

is it me, or do the newer 5.3 motors seem to have a broader torque curve than the earlier models ? i havent paid attention in a while.

Fast355

They certainly do have broader torque curve as they rightly should. They have better flowing heads, better intake, and a cam phaser that advances the cam at lower engine speeds and allows it to retard at higher engine speeds.

When I had my Nissan Titans I was amazed how much the phasing of the intake camshafts alone affected the powerband of the engine. The cam phaser moved the intake cams only, 30* advanced from the fully retarded 124* ICL to 94* ICL at lower engine speeds. There was a whole table in the PCM that controlled the phasing with RPM and Load. At part-throttle cruising speeds I found that retarding the intake cam considerably under light loads really helped the MPG. As soon as the throttle was tipped into I found it very helpful to advance the cam to create more torque.