Originally Posted by Fast Guy
Originally Posted by chip-3door
gt28 wont flow 400 horses, not even the disco potato one (gt28rs)
There was a Gtir running a GT28RS and it made 431bhp at 1.3bar
Have a look at the compressor map for that turbo and you will find that either thats a very optimistic rolling road, or a modified turbo or something.
Or failing that its just got a fantastic engine attached to it, after all my mates BBC makes 550bhp N/A off a carb, but your YB never will, lol
"Safe" on the boost map for a GT28RS is about 350bhp