-Downsides to a blower..
*slipping belt
*broken balancers
*broken crank
*worn front main bearings
*drag to drive blower belt
*full boost by 5000rpms or more
*exssesive inlet temps ( besides ATI's)
which means more chance for detonation
All of the issues listed might not be a problem for you, but they are some of the common problems associated with centrifugal blowers. Ive had almost every one listed when i ran a
vortech blower.
-upsides to a blower..
*slightly cheaper
*more readily avalible, usually
*easier to install, usually
*can look slightly nicer under the hood
-upsides to a Turbo..
*full boost much sooner ( usually around 2800-3200rpms)
*no drag on motor to drive
*no more stress on front crank, balancer, or bearings
*much cooler inlet temps ( almost all kits come with an intercooler)
*boost presures equal, turbos are more efficient at making power.
*More complete kits ( full exhuast, injectors, maf, ect.)
-Downsides to a turbo..
*slightly more expensive
*more assembly involved
*slightly more underhood heat ( which isnt even a problem)
*wait time/build time takes longer
Both will require a fine tune to the computer to get the target a/f ratio and to avoid detonation. I wouldnt say a turbo car is any harder to tune then a blower car.
My car started right up and ran great to 6k rpms 16psi boost without any aftermarket ignition or tune.. Did blow a headgasket, but thats my fault for only running 93octane.