I’ve been searching the forums all day but haven’t found any info. On stock cams, about what rpm does an fp green hit positive pressure and hit full boost? Assuming no boost leaks or exhaust leaks
also does journals bearing vs ball beaing matter when it comes to spool time/rpm or is it very minimal?

 

Full boost is too variable of a metric. I find looking for RPM @ 300ft-lbs in 4th is a much better way to characterize spool. Depending what generation of Green, could be 3600-4000 rpm. Also should be easy enough to look up dynos posted for that RPM@300.

For reference, my blouch 1.0xtr is 3200 for 300ft-lbs on my old 2.3l .