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Old 01-04-2005, 02:00 PM   #1
bryan carbon
Scooby Newbie
Member#: 34060
Join Date: Mar 2003
Default cm2 converted to A/R.

6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R

Found that on stealth316's website.
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Old 01-05-2005, 12:26 AM   #2
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Member#: 39378
Join Date: Jul 2003
Chapter/Region: NESIC
Location: Holyoke
2004 Carless
98' VFR800Fi/02' RC-51


T25 or T3 turbine housing?
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Old 01-05-2005, 04:33 AM   #3
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Join Date: Mar 2003
Chapter/Region: SCIC
Location: Santa Barbara, CA
2003 WRX Sporkwagon


I'm pretty sure those two numbers are referring to two very distinct and separate aspects of turbine geometry. That correlation may hold true for one particular turbine casting but that's it.
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Old 01-05-2005, 10:24 AM   #4
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Chapter/Region: NESIC
Location: lincoln, ri
2003 GGA MBP
12.9 / 105+


yes. we have the "As" given, but we do not know the "Rs" to give us the proper ratio.
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Old 01-05-2005, 11:51 AM   #5
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Join Date: May 2002
Chapter/Region: MWSOC
Location: Hannibal, MO
2005 Black STi
Happily rowing 6 gears


For that chart to be useful, we would need to know which Garrett housings it is converting to. T25, T3, T4, etc. To compare nozzle/inlet area (which is the 6cm^2 designation) to A/R we need to know which housings you mean. It's entirely possible to have a T3 and a T4 housing with the same 0.63 A/R, but the T4 housing nozzle area will be larger than the T3's. So for example, the T3 0.63 A/R could be close to a 7cm^2 housing, whereas the T4 0.63 A/R could be closer to 10cm^2 (due to a bigger inlet). <--- prolly not exact conversions, shown for illustration puropses only, I performed no math to get these numbers, just estimations. HTH's -Chuck
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