GM SAE Horsepower curve question

Engine : L96 6.0L gasoline engine

Hello, I have a question concerning the GM SAE Horsepower curve.
If you look at the curve it says that the max HP is 360hp(268kW) @ 5400rpm.
But the curve still goes up before starting coming down.

Just by looking at the curve isn’t the max HP be at the highest point on the curve graph?

Thank you.

The triangle isn't on the highest hp peak. Going by the hp scale on the right side, the peak of the graph is 360 hp. 

In reply to enginedynonoob :

There could be many reasons those points are selected. Most likely piston speed or rod angularity. 
as you know pistons stop movement briefly both at the top and bottom of the stroke and reverse direction. Since movement doesn't stop pistons accelerate at brutal rates.  Rates that put internals at risk of failure.  The limit may be there to ensure the internals  survive the EPA's mandated 50,000 mile requirement or to survive through the warranty period or both. 
 

without knowing the specifics of the issue it maybe like the Chevy small block 400. To fit within the confines of the small block Chevy was required to shorten the stock connecting rod to precarious degree putting the production connecting rods at extreme edge of durability with regard rod angularity issues. Luckily the station wagons and Suburbans they were used in didn't encourage high revs. Thus the engines wore out before failure.  ( with the long stroke short rod  combination bore wear accelerated to a degree that long engine life was unlikely. Since GM wanted to sell more new vehicles they were OK with that. 

Looks like the triangles are a cursor from a screenshot, and are at the torque peak.

Shouldn't those curves cross at 5250 or whatever rpm that is supposed to be?

In reply to bluej (Forum Supporter) :

The hp and torque have different scales. I had to figure that out too.

Its crossing at half of 5252.

Based on the scale to the right of the graph, the hp curve does peak  around 360hp. I think the triangle and the text are just incorrectly placed.

In reply to enginedynonoob :

What school project is this?

bluej (Forum Supporter) said:

Shouldn't those curves cross at 5250 or whatever rpm that is supposed to be?

That only happens when power is in Horsepower and torque is in lb-ft. Unique to those units. 

In reply to 81cpcamaro :

Right ,  If you follow the rpm gaph it matches the liste HP also.    The triangle is not an indicater

The horsepower peak is almost at 6000, assuming that the number is where the graph is and not an invisible line to the right of the number.

Vague graph is vague.

The triangle isn't placed at all.  It's an identifier for the graph's key.

It's entirely unnecessary since there is only one engine being shown, but when you overlay multiple data sets on a chart, you give them identifiers.  First run might have triangles, second one circles, third one squares, fourth one diamonds

It's simply a pictogram label that says these two lines belong in the same data set so you're not confused as to which lines you're looking at.