Reading through this makes me sad. I have been following this group of people since it started back on Cliffords website years ago and went through a few different versions/sites. Everyone has always been willing to discuss theory with out getting rude.
Keep us up to date on what you find and don't take the short answers personally. Some people people just operate in short answer mode and don't understand you may want more detail to back up the answers.
I understand what your getting add. The fascination with torque is driven by the fact that torque make you move and HP is just a formula that combines torque with rpm. One of these days, I will get the time and money priotities right so I can build a motor that make the most torque under the curve below 4000 rpm also. In normal day to day driving, you rarely get over 3 k much less 4k so for a daily driver punching up the torque under 4k makes sense. It would be interesting to know just how much faster spool up would be with 2 smaller turbos. Actual numbers would be great if you find some.
My thoughts on this would be to use a very short cam and as high a compression ratio as you could to maximize torque before a turbo kicked in and also provide as much heat/flow into the exhaust which would help the turbo spool up. Size the turbo such that the turbo is really kicking in when the cam starts to "go soft" and is really running out of steam at 4000. it would seem to get you fast spool up to maximize the turbo impact but aslo help with fuel economy when your foot is not in it.
Good luck
Keep us up to date on what you find and don't take the short answers personally. Some people people just operate in short answer mode and don't understand you may want more detail to back up the answers.
I understand what your getting add. The fascination with torque is driven by the fact that torque make you move and HP is just a formula that combines torque with rpm. One of these days, I will get the time and money priotities right so I can build a motor that make the most torque under the curve below 4000 rpm also. In normal day to day driving, you rarely get over 3 k much less 4k so for a daily driver punching up the torque under 4k makes sense. It would be interesting to know just how much faster spool up would be with 2 smaller turbos. Actual numbers would be great if you find some.
My thoughts on this would be to use a very short cam and as high a compression ratio as you could to maximize torque before a turbo kicked in and also provide as much heat/flow into the exhaust which would help the turbo spool up. Size the turbo such that the turbo is really kicking in when the cam starts to "go soft" and is really running out of steam at 4000. it would seem to get you fast spool up to maximize the turbo impact but aslo help with fuel economy when your foot is not in it.
Good luck