T3 Turbo Advice
#1
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Hi Guys,
I am looking at turbocharging a 1993 Miata 1600cc and am trying to decide on the turbo, I have narrowed it down to 2 T3 turbos and wanted to get some feedback as which would be better and some pros and cons, this is on a rebuilt stock engine and I would be running around 8-10psi initially.
Turbo 1
T3 TURBO CHARGER AR42 Compressor .48 Backend
Turbo 2
T3 TURBO CHARGER AR48 Compressor .63 Backend
Both T3 turbos would be using an internal wastegate.
Comments please.
I am looking at turbocharging a 1993 Miata 1600cc and am trying to decide on the turbo, I have narrowed it down to 2 T3 turbos and wanted to get some feedback as which would be better and some pros and cons, this is on a rebuilt stock engine and I would be running around 8-10psi initially.
Turbo 1
T3 TURBO CHARGER AR42 Compressor .48 Backend
Turbo 2
T3 TURBO CHARGER AR48 Compressor .63 Backend
Both T3 turbos would be using an internal wastegate.
Comments please.
#5
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Hi Guys,
I am looking at turbocharging a 1993 Miata 1600cc and am trying to decide on the turbo, I have narrowed it down to 2 T3 turbos and wanted to get some feedback as which would be better and some pros and cons, this is on a rebuilt stock engine and I would be running around 8-10psi initially.
Turbo 1
T3 TURBO CHARGER AR42 Compressor .48 Backend
Turbo 2
T3 TURBO CHARGER AR48 Compressor .63 Backend
Both T3 turbos would be using an internal wastegate.
Comments please.
I am looking at turbocharging a 1993 Miata 1600cc and am trying to decide on the turbo, I have narrowed it down to 2 T3 turbos and wanted to get some feedback as which would be better and some pros and cons, this is on a rebuilt stock engine and I would be running around 8-10psi initially.
Turbo 1
T3 TURBO CHARGER AR42 Compressor .48 Backend
Turbo 2
T3 TURBO CHARGER AR48 Compressor .63 Backend
Both T3 turbos would be using an internal wastegate.
Comments please.
What I can tell is that 'back end' refers to the turbine housing AR. As a general rule, the lower AR of the turbine housing, the more focused it is on low boost threshold and minimal lag. The higher it is the more focused on top end flow. But thats also affected by the size of the compressor wheel, the style of the housing, and a few dozen other things.
#6
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While I like to concentrate on back ends often as well, you should know that we really aren't just about back ends. We like to know other things as well. I like to pay attention to some trim when I'm sure I'm satisfied with the back end. So tell me, are you a fan of trim, son, or are you a shaft man?
#7
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Here are the links for the actual turbos.
Turbo 1
T3 TURBO CHARGER AR42 Compressor .48 Backend
http://cgi.ebay.com/ebaymotors/T3-TU...item51925e6c99
Turbo 2
T3 TURBO CHARGER AR48 Compressor .63 Backend
http://cgi.ebay.com/ebaymotors/T3-TU...item5d28eb3d0b
Hope this helps, I am looking for a good all around turbo, something that doesnt spool too quick and then run out at higher rpms, but also not something that spools too late and then there isnt much usable boost.
Turbo 1
T3 TURBO CHARGER AR42 Compressor .48 Backend
http://cgi.ebay.com/ebaymotors/T3-TU...item51925e6c99
Turbo 2
T3 TURBO CHARGER AR48 Compressor .63 Backend
http://cgi.ebay.com/ebaymotors/T3-TU...item5d28eb3d0b
Hope this helps, I am looking for a good all around turbo, something that doesnt spool too quick and then run out at higher rpms, but also not something that spools too late and then there isnt much usable boost.
#11
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These would be the relevant specs. As opposed to the wonderfully specific AR42 tag.
Inlet Size 2.5"
Outlet Size 2.25"
Type of Bearing WET FLOAT BEARINGS
Oil inlet Size 1/8 NTP
Type of wastegate Internal wastegate (default 8 PSI)
Compressor .42 AR Compressor
Compressor wheel exducer: 60.41mm/ inducer: 43.20mm
Turbine .48 AR Turbine
Turbine wheel Inducer: 62.86mm/ Exducer: 45.74mm
Type of Flange T3
Type of Down Pipe Flange 2.5" v-band
And since Brain is running this turbo, the dyno section is your freind OP.
https://www.miataturbo.net/dynos-timesheets-21/
Thats as much hand-holding as anyone gets around here for good reason.
Inlet Size 2.5"
Outlet Size 2.25"
Type of Bearing WET FLOAT BEARINGS
Oil inlet Size 1/8 NTP
Type of wastegate Internal wastegate (default 8 PSI)
Compressor .42 AR Compressor
Compressor wheel exducer: 60.41mm/ inducer: 43.20mm
Turbine .48 AR Turbine
Turbine wheel Inducer: 62.86mm/ Exducer: 45.74mm
Type of Flange T3
Type of Down Pipe Flange 2.5" v-band
And since Brain is running this turbo, the dyno section is your freind OP.
https://www.miataturbo.net/dynos-timesheets-21/
Thats as much hand-holding as anyone gets around here for good reason.
#13
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Braineack, I was looking at your dyno post with this turbo and it does seem to be falling off around 5000rpm instead of making power up to redline, it does appear to be build boost quickly though, might be a bit to quick for my liking.
I like the idea of a turbo that comes on around 4000-4500 and pulls hard to redline.
I like the idea of a turbo that comes on around 4000-4500 and pulls hard to redline.
#14
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You should look into buying a T3/T4 hybrid turbo from a Buick Grand National. '86-87 is the preferred years. They can make around 350rwhp maxed out. .68 A/R hot side and they have tiny inlet compressor wheels and relatively small turbine outlets. Used they sell for under $200 all day long.
#15
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Braineack, I was looking at your dyno post with this turbo and it does seem to be falling off around 5000rpm instead of making power up to redline, it does appear to be build boost quickly though, might be a bit to quick for my liking.
I like the idea of a turbo that comes on around 4000-4500 and pulls hard to redline.
I like the idea of a turbo that comes on around 4000-4500 and pulls hard to redline.
this turbo does not spool "quick"...
A t25 spools quick:
![](http://www.boostedmiata.com/gallery2/d/10117-1/April-10_vs_Lars_dyno.jpg)
it tapers off because the 50 trim compressor wheel is only good for about 27 lb/min, and I'm more or less hitting that around 6000RPM. I have a feeling the power output would look more like the red dyno above if the turbine wasn't so odd.
#17
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Could we get this thread back on topic? I believe it was mainly focused on "backends."
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