[IneedAZ]

I could be wrong, but picking the right tuner can be the most important upgrade. I see results posted after pulley and exhaust upgrades where hp is much higher than tq, but now I see a local guy post and his is opposite. He posted 650hp/700tq. I would think tuners would try to have it more balanced. Same issue I see with people who did more in depth upgrades where the numbers are skewed in one direction.

[jvandy50]

This caught my eye when i switched over from the coyote/voodoo world. Torque is always way lower over in ford land, but seems easier to get higher HP. See the torque nearly equal to or sometimes even a tad higher on some of these builds over here.

[SJFGTO]

With the design and specifications of the LT4, like all GM “Chevy” small blocks, max toque will almost always be the same or higher than max HP. Tuners have very little to do with the raw numerical difference between HP and torque. Engine design/specifications and particular modifications will impact max HP versus torque, a tune basically programs the computer to maximize the efficiency of the modifications.

[IneedAZ]

Originally Posted by SJFGTO

With the design and specifications of the LT4, like all GM “Chevy” small blocks, max toque will almost always be the same or higher than max HP. Tuners have very little to do with the raw numerical difference between HP and torque. Engine design/specifications and particular modifications will impact max HP versus torque, a tune basically programs the computer to maximize the efficiency of the modifications.

Which makes me wonder when i see someone post their numbers and the HP is skewed way high compared to the TQ if they do it for a bragging rights to say look at my HP number, but i question how good is the overall tune driving down the road or racing at the track.

[Juiced1]

With the LT4 you often see higher torque numbers. It's because these blowers are small and already spun hard from the factory. We notice that builds without porting usually make higher torque numbers and the ones with good port work/103s see the higher horsepower numbers. It has a lot to do with the LT4 struggling to get more air up top since the blower is pretty much maxed out rpm wise on a lot of builds. Without the available air from the additional porting the top end can suffer.

[Too_Fast]

Originally Posted by Juiced1

With the LT4 you often see higher torque numbers. It's because these blowers are small and already spun hard from the factory. We notice that builds without porting usually make higher torque numbers and the ones with good port work/103s see the higher horsepower numbers. It has a lot to do with the LT4 struggling to get more air up top since the blower is pretty much maxed out rpm wise on a lot of builds. Without the available air from the additional porting the top end can suffer.

Very well said !

[Gunkk]

Originally Posted by jvandy50

This caught my eye when i switched over from the coyote/voodoo world. Torque is always way lower over in ford land, but seems easier to get higher HP. See the torque nearly equal to or sometimes even a tad higher on some of these builds over here.

HP = Torque x RPM ÷ 5252

The faster you can spin the engine, the more HP you make. If, on paper, you were to stop a pull on a voodoo or coyote at at Chevy's 6500 redline you'll see the limit of their engines pretty readily.

This is an old Z/28 chart, but it makes the point that sure the mustang can make a few more HP, but it only does it at the very top of the curve at over 7k RPM.

Area under the curve is what you feel with your butt-dyno. And this is why most folks like driving the Camaro more on the street.