25-12-2011, 07:19 PM
Pretty much sums it up, also those flow rating are according to the manufacture, you can make more or less on that but that's kind of a kind line figure,
A wastegated GT2056 should spool more quickly than a TD04 or a T25 but maybe not as quick as any of the OEM fit XUD turbos.
What you have to remember is that power is a product of torque and revs, to make 200 hp at 4000 rpms you need more torque than and engine making 200hp at 6000 rpms, be it diesel or petrol at there respective peak power.
To understand what I've said here is the formula....
power= torque*rpms/5252
Why 5252? well if you look on any power graphs thats the point where the 2 lines meet, on any graph...
so lets say, you want 200 hp at 4000 rpms, so we can use another of those formulas to find out how much torque you would need to make 200 hp at 4000 rpms as follows...
torque= power*5252/RPMS so....
200*5252/4000 = 262.6 lbft....
what if we want more revs like I said before.... 6000 rpms
200*5252/6000 = 175.1~ lbft...
make sence? because you are reving the engine higher you need less torque..... just take a look at the honda vtec engines, they produce lots of power for there size but not a lot of torque because they make there power through revs, we need torque to make the power we want.
hope this explains, and my apollogises in advance if I at all seemed patronising.
A wastegated GT2056 should spool more quickly than a TD04 or a T25 but maybe not as quick as any of the OEM fit XUD turbos.
What you have to remember is that power is a product of torque and revs, to make 200 hp at 4000 rpms you need more torque than and engine making 200hp at 6000 rpms, be it diesel or petrol at there respective peak power.
To understand what I've said here is the formula....
power= torque*rpms/5252
Why 5252? well if you look on any power graphs thats the point where the 2 lines meet, on any graph...
so lets say, you want 200 hp at 4000 rpms, so we can use another of those formulas to find out how much torque you would need to make 200 hp at 4000 rpms as follows...
torque= power*5252/RPMS so....
200*5252/4000 = 262.6 lbft....
what if we want more revs like I said before.... 6000 rpms
200*5252/6000 = 175.1~ lbft...
make sence? because you are reving the engine higher you need less torque..... just take a look at the honda vtec engines, they produce lots of power for there size but not a lot of torque because they make there power through revs, we need torque to make the power we want.
hope this explains, and my apollogises in advance if I at all seemed patronising.