[Raptor04]

Any know if the lean spool function helps the turbos to spool faster?

[Tzu]

Not much on stock turbos.

[AWTT335i]

Originally Posted by Raptor001

Any know if the lean spool function helps the turbos to spool faster?

In theory it should, but is likely marginal. Basically just increases EGT rapidly by leaning AFR and decreasing timing.