DanaT

Every engine will have this ratio:

Torque = 5252 x HP x rpm

The "ratio" is the definition of power. You cant change physics.

Crackership

Ummm.. Not quite. As one of my very Chinese engineering instructors in my undergrad would have said: "You algebra bad!!"

if HP = (Tq x RPM)/5252; then Tq = (HP x 5252)/RPM

333pg333

My point was to compare the tq/hp of other people's charts via the curves not the numbers.

DanaT

My bad. Typo. Dont know I didnt see that I wrote multiply in stead of divide (well, not proofreading is how).

Crackership

No worries, I knew what you meant... I was just told so many times in my undergrad that my algebra was bad... couldn't pass up the opportunity to say it to someone else

DanaT

I am not getting what you are saying.

Without "numbers" what good is the curve?

Are you trying to say that you are wanting to compare the area under the curve? In that case, you still need to know the numbers.

944Nord

With some mods by ETG

Paulyy

i thought you where Bob Norwood for a second then i expected some off the chart 800hp motor.

What turbo you using? seems the same power curve (but more power) then a k26/8. usually around 210 kw peak.

944Nord

Its 26/8 turbo rebuild, but I think that the internals isn’t stock. It should hold up to 380 hp if you were running higher boost than I am doing
The downpipe and exhaust is 3 inch

Paulyy

there's no way a stock k26/8 would make that much power.

and by looking at your 2 graphs, i doubt you could do 380hp safely, looks like it'll rut of breath. Looking at the dyno, the more boost you run, the more the peak power moves to the left as it runs out of breath (note how the torque drops heaps)

944Nord

Hi Paulyy.
I don’t know how much power my turbo can deliver, the number 380 hp is from ETG web site.
I don’t have the knowledge to discuss if that turbo can deliver 350 hp or 380 hp or any other number,
So I don’t want to do that?
For the moment I am satisfied with the setup of the engine.
As I wrote before it is a 26/8 but with modern internals, I think it is the cold side that is modified.

Udo

DDP

Made 480 whp and 430 tq on 2.5. They should be relatively close depending on airflow characteristics.

333pg333

No, all I meant was that comparing numbers from one user's chart to yours is really vague based on all the differences involved. Comparing where the tq or hp comes in on the graph is more relevant.