in the link 4A-GTE the turbo section says that the guy used the rb20/25 turbos because of pulse per cycle. i was discussing this with other friends and we cant figure out WHY the turbo would spool (is that even the correct term in this case?) alot faster on a smaller engine displacement?
eg.
RB20DET 6cyl (2ltr 6cyl turbo)
2000cc divided by 6cyl = 333.3
333.3 pulse per Cyl
RB25DET 6cyl (2.5ltr 6cyl turbo)
2500cc divided by 6cyl = 416.6
416.6 pulse per Cyl
4A-GE 4cyl (1.6ltr 4 Cyl N/A)
1600cc divided by 4cyl = 400.0
400.0 pulse per Cyl