G'day just a quick question i notice over there in the states when you are talking about turbo sizing you go by mm, over here we talk about turbo size in terms of HP. When you are talking about a 57mm turbo what is the serial number of this size turbo in the garret range?

 

Re: 67mm???

In the state the mm size will refer to the inlet.
As a general measurement, like an 88. would be a turbo with an 88mm inlet.
But there are alot of different 88's. t4 t6 & mid sized frame turbos.

What motor do you have?

 

I'am building a 4.6DOHC out of a mark 8 and it commin close to choosing the turbos i want to use

So far it has
after market rods and decomp pistons
Aftermarket Springs valves and retainers
Mild Cams
Slightly posted head (basically just cleaned up)


Was thinking of running twin 57's or maby a little bigger looking for the 600-700 rwhp mark

 

Twin Sc61's from Precision??... 76 trim exhaust and ball bearing.