^^Depending on tuning you can get many or no issues.
I have no problems with stumble or ptb. Plenty of people speak of lag on a bigger turbo, depends on many things. Dual BB turbos are quicker to spool, mine hits around 3800 rpm and holds through till 6200 at 22 lbs.
Hookup is more of an issue than lag.
Finally a thread where people can talk and compare big turbos. Keep those S3R babies out of here!!
Maybe I'll start posting again.
Thanks for the thread Brady. Whitby England?