turbonetics what one is it???

[norice4me]

got this turbo brand i saw it i wanted it im trying to fier out what it is tho can you help

her is all the numbers on it
on the intake housing on the back says turbonetics T-19490 and 30491 E-50
on the exaust side says 20357-02 .48 stg ll

hear are some pics

 

[gsxtacy]

looks like a T3 flanged RS49

.48 hotside means it will come up on boost real quick and be choked up top.....OR perfect for a 1.6 Vtec

.63 is the norm for 2.0L

 

[norice4me]

well is this not even worth to put on my car cause i have a 2.3 stroker in the car now

 

[pitbull419]

if .48 means it will boost real fast and .63 is the normal for dsms.
Does this mean the smaller the number the faster it boost in all applications?\
Sorry for kind of going off topic.

 

[brute]

It's really quite simple concept. I can't explain it any better than this, so I directly quoted it:

Using a smaller A/R will increase the exhaust gas velocity into the turbine wheel. This provides increased turbine power at lower engine speeds, resulting in a quicker boost rise. However, a small A/R also causes the flow to enter the wheel more tangentially, which reduces the ultimate flow capacity of the turbine wheel. This will tend to increase exhaust backpressure and hence reduce the engine's ability to "breathe" effectively at high RPM, adversely affecting peak engine power.

Conversely, using a larger A/R will lower exhaust gas velocity, and delay boost rise. The flow in a larger A/R housing enters the wheel in a more radial fashion, increasing the wheel's effective flow capacity, resulting in lower backpressure and better power at higher engine speeds.

I agree with Kelly: T3/T04 50-trim with the Stage II turbine wheel in a .48 a/r turbine housing. Only way to 100% this is to measure the wheels. If it is indeed a T3/T04 50-trim, the compressor should be 2.122 inch inducer and 3.00 exducer.

 

[pitbull419]

So if im looking for a turbo for my daily driver and i want a turbo that boost over a longer rmp range and also boost hard what a/r should i go with im looking at the gt35r but i think it only comes in .63 or .82 I think .82 is ###### to big but .63 might be to small.

 

[brute]

The turbine a/r generally does not allow a broader range of boost, it just shifts the range up or down the rpm range. So you either boost very quickly and have no top end, boost moderately with excellent mid but little top, or boost slowly and have ridiculous top.

Of course there are exceptions, but this is generally true. It's all about compromises.

 

[pitbull419]

So i should go with .63 or sumthing a little bigger for a street/strip car?Maybe somewhere around .70?
I run mid 11's now i want something that will break me into 10's but great on the street.