Originally Posted by
gomba with your ability to rev out definitely get a bigger turbo. you can give up some spool time due to higher revs.
Also if you already have the b15 tranny then I guess go ahead and use it otherwise I'd just stick with the b14. it has a bad rep but a lot of us have had good luck with them on turbo setups.
Normally the VE head outflows the DE head at most RPMS, so you would not give up much spool time as you think. Headflow is the name of the game here