I am tuning my car now and trying to limit peak torque, which comes just past 5k RPM and it led me to a question. I would like to pick up some low end torque by running more boost just past 4k and then tapering for just past 5k. The next part is what is not something I ever see on a dyno... Approaching and after 6k I would like to pick boost back up to make as much top end power as I can.

This would lead to a boost curve that is not the typical spike-taper, flat, or build boost with RPM curve and would be roughly 30 psi -> 28 psi -> 30+ psi. I'm trying to keep lowering timing in my peak power area to be able to reduce torque and have a more typical boost curve but I don't know how low I can go and keep reducing torque.

Is there a problem with tuning your boost curve to be like this? Should I just sacrifice a little low end torque and use a ~28 psi -> 30+ psi curve instead?

 

If I remember right, you were spoiling a bit slow. The green should have 30psi by 4k. Post log or graph of your boost and a dyno chart..

 

I'm out tuning now and building boost much better. It was over 90 degrees when I did the pull I posted and I think that messed with things.