Ball Bearing vs. Journal Bearing

[TheSparo]

i was thinking about this, and i know the difference is longevity and spool, but how much quicker spool is a BB center? is it sort of a bling factor? because my turbo may have fell through on the GT2871R .86, and i was wondering if it would be much different from say a SC50 or GT3251E these of course are higher power turbos... but in all relativity. I've seen dyno's where the GT2871 will spool ~400rwhp @ 4500rpm and i was curious what type of poerband the journal bearings would give? Also, the price difference is like $400+ I would appreciate the help.
THanks
-Jeff

[orion::S14]

Few hundred RPM, from what I've read.

And the biggest difference is the transitional response, no so much initial spool.

- Brian

[TheSparo]

how do you mean transitional response? such as when shifting, and it spooling when exhaust is already flowing high?

[orion::S14]

^^^ Yep...

[cheez80]

also, please keep in mind that a journal bearing turbo can be rebuilt easily and cost-effectively, but a ball-bearing turbo costs a LOT more to rebuild.

just my $.02