I am thinking of a t3/t04e with these specs;
60 A/R HOUSING
60 TRIM WHEEL
TURBINE SPECS:
.82 A/R HOUSING
STAGE 3 WHEEL
I am more into dragging than auto x. Comments? Suggestions?
Thanks
t3/t04e turbo spec
Will the car be driven on the street or just the strip? If it's going to driven on the street, great turbo, bad .82 in my opinion. You will not get decent boost till about 4200 rpms. Even .63 is a bit on the stout side for street use. A/R housings that big are usually made more for top end, which is also necessary for dragging but you have to get the car moving to the end of 1320 feet quickly. I would say drop the A/R down to .48 or at the most .63. Its your ride and you have to decide what you want the car to do 
Hope this helps.
Hope this helps.-
C-Kwik
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Not a bad match. The T04E-50 is probably a better compressor trim to work with. As far as the exhaust, the T3 turbine should allow for quick spool-up. Even with a .83 A/R. My T04B turbine with a .69 A/R still spools up quickly enough, and it should flow more than a T3 turbine. The .83 A/R should allow better top-end than a lower A/R since it will allow more flow. Not a bad choice though, you won't be complaining about it, but there is a better match out there...
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C-Kwik
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You'll have a hard time getting enough airflow through a KA to be at the peak efficiency island with 60-1 compressor. And you may actually even get some compressor surge, especially since it has a T3 turbine. My mapping approximations for spool up were based on a T04 turbine and it is much too close to the surge line for me to be comfortable with it. Probably a very poor choice.
C-Kwik wrote:You'll have a hard time getting enough airflow through a KA to be at the peak efficiency island with 60-1 compressor. And you may actually even get some compressor surge, especially since it has a T3 turbine. My mapping approximations for spool up were based on a T04 turbine and it is much too close to the surge line for me to be comfortable with it. Probably a very poor choice.
C-Kwik What do yo think about this turbo:
T04S (T4/60-1)COMPRESSOR SPECS:T04S
- .70 A/R HOUSING
- 60 TRIM WHEEL
TURBINE SPECS:T4
- Choice of .70 or .84 A/R TANGENTILE HOUSING
- V-BAND DISCHARGE
- Oil lubricated centersection.
- For use with external wastegate
COMES STANDARD WITH 360 DEGREE THRUST BEARING
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C-Kwik
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#1 Stunna wrote:C-Kwik What do yo think about this turbo:
T04S (T4/60-1)COMPRESSOR SPECS:T04S
- .70 A/R HOUSING
- 60 TRIM WHEEL
TURBINE SPECS:T4
- Choice of .70 or .84 A/R TANGENTILE HOUSING
- V-BAND DISCHARGE
- Oil lubricated centersection.
- For use with external wastegate
COMES STANDARD WITH 360 DEGREE THRUST BEARING
It's still a 60-1 compressor. A given engine size with a given VE can only take so much air in at a given pressure ratio(boost). The turbine will have very little effect on this as the problem is that the KA will not flow enough to get into the peak efficiency island of the 60-1 compressor section. Perhaps increasing the VE and raising the rev limit might help, but the biggest factor will probably be the engine size more than anything else. The turbo will work, but you can easily find a compressor that is much more efficient for the KA which would net more power at the same boost level.
C-Kwik wrote:It's still a 60-1 compressor. A given engine size with a given VE can only take so much air in at a given pressure ratio(boost). The turbine will have very little effect on this as the problem is that the KA will not flow enough to get into the peak efficiency island of the 60-1 compressor section. Perhaps increasing the VE and raising the rev limit might help, but the biggest factor will probably be the engine size more than anything else. The turbo will work, but you can easily find a compressor that is much more efficient for the KA which would net more power at the same boost level.
Which turbo would you recommend for something around 450-550hp capable? Thanks for the info.
Ivanhttp://www.HypnoticPerforance.com
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Slash88-300zxt
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GT30 .82 AR.. should spool fast enough and provide the air for that sort of HP easilly.. its been done many times before.. your engine build will have to be redicilous tho to handle it for a KA24E. and moderate for a KA24DE. theres a lot of work ahead of you inthe management and fuel departments also
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C-Kwik
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Slash88-300zxt wrote:GT30 .82 AR.. should spool fast enough and provide the air for that sort of HP easilly.. its been done many times before.. your engine build will have to be redicilous tho to handle it for a KA24E. and moderate for a KA24DE. theres a lot of work ahead of you inthe management and fuel departments also
This is only speculation since I don't have actual maps. According to my Garrett catalog, the GT30 uses a T04S compressor. The 60 trim uses the same compresor wheel specs(ind/exd) as the 60-1. The smaller trims use a smaller inducer, and I don't have a map to show how well a match those are.
As far as what I think is the best compressor for 450-550? You're looking at some 20+ PSI to make that. Getting into that range at such low airflow rates will put most turbos in the surge area or way out of the peak efficiency island. Being out of the efficiency island means you have to boost even more or really increase the overall VE of the motor. What might help is to move the electronic redline closer to the mechanical limits of the KA and use a turbo friendly cam that will move the peak VE up closer to the mechanical redline. You're low-end could really suck after that. Especially couples with a turbo that flows well. You could also try a turbo that has provisions for allowing some surge, but I don't know that might affect the mappings of those turbos. I haven't come across any literature on it. I think these are typically used for race cars though.
But a T04E-50 will still be at 76% over 2 bar of boost. The Super T04E-50 might work well at that boost level as well and may perhaps be a better choice. But at those boost levels it's hard to say since I don't know the spool up charactersitics at such high levels of boost. My guess is that will work, but it's only a guess. The choice of turbine obviously would have a drastic affect on this too. For that kind of power, I'd look towards a higher flowing turbine...just make sure it leaves still spools up so that you have a usable powerband. The more power you make, the narrower your powerband will probably be. You may think about custom gearing at that point too to space the gears more closely.
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starfireS14
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C-Kwik
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starfireS14 wrote:I'm new to the turbo world myself and still learning. Can someone break down what all this means...
COMPRESSOR SPECS:
.60 A/R HOUSING
50 TRIM WHEEL
TURBINE SPECS:
.48 A/R HOUSING
STAGE 3 WHEEL
A/R stands for Area/Radius. The Area is for the area of the cross section of thr hole that the air is forced through by the compressor on the compressor side and on the turbine side, the area of the cross section of the hole that air is foced through by the motor. The R refers to the radius of the center of the hole from the center of the turbine or compressor.
The Trim refers to the specs of the compressor wheel. Take a T04E compressor for example. a 50 trim wheel has a 2.122 inducer diameter, and a 3.000 Exducer diameter. A 57 trim has a 2.230 Inducer and a 3.000 Exducer.