The perception of turbo lag as it relates to RB26 powered vehicles. The dyno charts shown below are in no means scientific. They are done on different days, different cars, different setups. What we are looking at is overall ideas.

On this setup lets look at some horsepower levels and corresponding rpms. I want to start most at around 3000 rpms as thats where we start most of our Dynapack runs.

Looking at the blue stock line on these runs 8 psi on stock turbos, stock engine

3000 rpms 80 whp

3500 rpms 110 whp

4000 rpms 150 whp

4500 rpms 180 whp

5000 rpms 200 whp

5500 rpms 220 whp

6000 rpms 225 whp

6500 rpms 230 whp

7000 rpms 230 whp

7500 rpms 225 whp

This chart is a stock turbo car, with the boost cranked way up... 25 psi. Big dip is a boost cut.

3000 rpms 125 whp

3500 rpms 175 whp

4000 rpms 250 whp

4500 rpms 300 whp

5000 rpms 340 whp

5500 rpms 360 whp

6000 rpms 400 whp

6500 rpms 410 whp

7000 rpms 400 whp

7500 rpms 390 whp

Next is a N1 - AA403 car. On good fuel, otherwise fairly stock. Boost max of 23 psi. Tapering off in the upper rev range down to about 20 psi.

3000 rpms 155 whp

3500 rpms 200 whp

4000 rpms 260 whp

4500 rpms 320 whp

5000 rpms 390 whp

5500 rpms 420 whp

6000 rpms 430 whp

6500 rpms 450 whp

7000 rpms 420 whp

7500 rpms 405 whp

Same engine as above, but a swap over to "special Nismo turbos". Best I can tell by looking at charts and measuring them, is a HKS 2510 turbo equivalent.

3000 rpms 150 whp

3500 rpms 175 whp

4000 rpms 220 whp

4500 rpms 300 whp

5000 rpms 410 whp

5500 rpms 480 whp

6000 rpms 515 whp

6500 rpms 530 whp

7000 rpms 530 whp

7500 rpms 525 whp

Now the comparisions

Turbolag Excel document

Stock turbos at different boost levels.

Small turbos Single turbos