Puck hole size

[HellOnWheels]

Getting ready to install a .63 Garrett turbine housing on a T63E and it'll be bolted to a THDP. The puck on the downpipe measures 1.350", the puck hole in the housing measures 1.0" would there be any benifit to opening up the turbine puck hole a little more, say to 1.250"?
Would the boost be more stable leaving the hole @ 1.0" or opening it up to 1.250"???


TIA

HOW

 

[GNVAIR]

Leave it at 1"

 

[tom h]

With the large hole, There would be nearly 50% more net force on the puck, for the same boost.

Would need a much stronger wastegate spring just to maintain the same boost.

 

[2QUIK6]

Just try it the way it is, if for some reason you can't controll boost at low boost levels or you have boost spike, then try opening it up slightly more. As mentioned, you don't want to open it up if it does not need to be.

 

[cdsttype]

puck size

i had to enlarge the hole in the housing in order to control my boost level with a tight rod setting my boost was to high
with a loose setting it was to slow to spool

 

[salvageV6]

1.125" works for me with my THDP, puck isn't centered exactly so I don't dare go bigger, nor need to right now.