Can anyone explan the concept of such? I'm interested in 'turbo-stall', and RPM's of the turbo device.. Is there anyway ouside of a lab (ie. In my car:) to monitor the turbo's RPMS? How is turbo-stall affected by altitude/pressure changes? Thanks brooks -fort collins/laporte area, n. colorado- [ brooks@frii.com '89.5 200Q @ 1.8 S&W Sigma 9F 17+1 ] -i hate taco bell, especiially the ads on t.v.