Difference between a/r .48 and a/r .63
03-28-2004, 03:24 PM
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Difference between a/r .48 and a/r .63
When the description of a turbo says say t3/t4 50 trim a/r .48 what does all that mean. What does the trim mean and what does the a/r mean??? thanks in advance 
03-28-2004, 03:47 PM
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Re: Difference between a/r .48 and a/r .63 (ITSTOCK)
trim is the size of the compressor fins. There's an equation for it. Basically you plug in the lenght of the inducer and exducer and you get the trim.
03-28-2004, 04:02 PM
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Im looking for a quick spooling turbo for only about 12 psi MAX. I will probably run 8 psi daily and 12 psi for high boost. what would be the specs of a turbo that i should look for?
i was told a t3/t4 50 trim but not sure of the a/r
i was told a t3/t4 50 trim but not sure of the a/r
03-28-2004, 04:08 PM
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Re: (xtremeness101)
What motor is it going on? I have a Precision SC50 off my totalled d16-T civic for sale. It's a 50 trim turbo with a .60 compressor side and i got the smaller optional .48 exhaust side so it spools pretty good even for a 1.6L sohc.
03-28-2004, 04:13 PM
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Re: Difference between a/r .48 and a/r .63 (xtremeness101)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xtremeness101 »</TD></TR><TR><TD CLASS="quote">When the description of a turbo says say t3/t4 50 trim a/r .48 what does all that mean. What does the trim mean and what does the a/r mean??? thanks in advance </TD></TR></TABLE>
that refers to turbine housing, theres usually 3 stages of wheels to choose from. for turbonetics 1 is smaller diameter, while 2 and 3 are same outer diameter but 3 has larger inducer.
theres a formula to calculate a/r based on your compressor trim. how much whp do you plan to have, what type of engine and redline.
</TD></TR></TABLE>that refers to turbine housing, theres usually 3 stages of wheels to choose from. for turbonetics 1 is smaller diameter, while 2 and 3 are same outer diameter but 3 has larger inducer.
theres a formula to calculate a/r based on your compressor trim. how much whp do you plan to have, what type of engine and redline.
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03-28-2004, 04:37 PM
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Re: (xtremeness101)
for 250whp, you'd be good with .48 a/r. i'm running T04B 50 trim - .48 a/r stage 2 wheel, theres no concern with top end, although it peaks at redline at ~260whp, if i'm to run closer to 300-325whp, - it would probably peak a bit lower.. around 7500-8000rpm. the advantage is having torque come in much earlier and quicker response.
03-28-2004, 07:45 PM
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