Another turbo question. Help identify turbo

9

99turbo2500

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Jul 30, 2012
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I just bought a twins kit minus the bottom turbo. The top for the kit is a 62/65/12 t3 of course. I decided I'm putting the Billet S475 I bought last year under it. While I was looking for the 475 I found a turbo I bought a couple years ago that I think might work good for the twin setup. Turbo says S300 P/N 177283 S/N 04B222100251. I think it's a T4 63/68 .88 but everything I found on the .88 says undivided but the housing has a divider. Would this spool decent (similar) to the 62/65/12 for towing or would it be really lazy compared to that turbo? This turbo is also ungated
 
If you looking in one of the volutes, the size of the housing should be stamped in the casting.
 
Great, I only have about 100 miles on it. I start building boost right off idle, waiting on parts to monitor the primary's boost.
 
177283 is a 63/68/.88 open, but the turbine housing could've been changed. The divided housing is most likely the .91, but there is a .83 available. As for spool up, it will be slower than your current 62/65/12, regardless of which a/r is actually on it. Bigger turbine wheel and looser housing is gonna be slower in bottom, but have lower back pressure up top.
 
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