zippo wrote:b/b units cost more but are more responsive and last longer and these days a unit off the self will get you where you want to go ......you are well behind
bb will give u what.... ~2-300rpm faster spin up for same size turbo.
Negligible for street performance really.
T04b and older turbos lasts years. They don't fail 3 times more.
Even ebay turbos getting it done nowadays. Seen a few very fast
street cars sporting $150-350 ebay jobs, holding up @25-30psi! No
additional balancing, bolted straight on.
From observation, these turbos outlast their "upgrade stage". At that
point you can throw it away... vs say, getting on the 'gt bb
bandwagon' to pay $1200 for a gt30, only to outgrow it 8 months later
when you'll be lucky to see $600 at resale
good to have 'options' in any event