Oooh lovely a dirty T25 thread!
T25's are pretty big, you need to chuck fuel at them down low to help with spool and as said you want at least 25 PSI worth of fuel going through for it to feel quick.
Mine was a laggy b*stard, didn't like being on full boost until well after 3k, still epic though and an improvement over any standard turbo (if power is your goal rather than drive-ability).
Don't be fooled by what you hear, there similar to TD05's in some respects! /canofworms
T25's are pretty big, you need to chuck fuel at them down low to help with spool and as said you want at least 25 PSI worth of fuel going through for it to feel quick.
Mine was a laggy b*stard, didn't like being on full boost until well after 3k, still epic though and an improvement over any standard turbo (if power is your goal rather than drive-ability).
Don't be fooled by what you hear, there similar to TD05's in some respects! /canofworms