Ok im looking into purchasing a turbo for my 6.0 mustang. It has a th400 and its basically a stock 6.0 with ls1 intake. I plan on pushing 600whp and later rebuilding it with forge pistons and try for 800whp. Now I have the option of a s472 with 1.10 ar and 83mm turbine wheel ir an s475 with 1.32 ar and 96mm83mm wheel. Now I don't want a super laggy turbo but I want it to be able to support my goals. Is the smaller one of the 2option better? This is a car that I will drive on weekends around town and take to the track. Hopping for a mid 9 sec pass in my 3200lbs mustang

 

s475 with 87mm turbine wheel.

 

S480!

 

Get the bigger of the two.

Lag and spool are just two things that are there to give the other guy your racing just enough time to think he is winning, before you remind him that he should of nailed his doors shut after you blow them off going past them.

 

S480 >>>>>>>>>>>>>>>

 

Thinking mid 9's on 600 at 3200 is going to be pretty tough. I would step up to the s480 and shoot for 750-800.