can someone tell more about this turbo, cause im really interested, i really want to know who has it and what kinda power this turbo is pushing, im thinking about buying this turbo really soon when i get paid on the 20th or should i go with another route...

this turbo will go on a B16A with cp pistons, and manley rods or pauter rods (well still undecided on the rods) but thanks for the help guys...

 

I called up Don from precision the other day, they said they dont make a T3 GT40, only T4's. they did say that they had plans to produce a T3 in the future

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ChefMasterGT &raquo;</TD></TR><TR><TD CLASS="quote">can someone tell more about this turbo, cause im really interested, i really want to know who has it and what kinda power this turbo is pushing, im thinking about buying this turbo really soon when i get paid on the 20th or should i go with another route...

this turbo will go on a B16A with cp pistons, and manley rods or pauter rods (well still undecided on the rods) but thanks for the help guys...</TD></TR></TABLE>

there are ways to do this, precision and others may not offer it but it has been done. it will take some maching to older turbine housings. the first part is tracking down these housing, then finding someone capable of machining the housing for you.

yes i know they say it cant be done, but isnt that the fun part of things. doing things people say cant be done. if your interested in doing this pm me

 

http://cheapturbo.stores.yahoo.net/t3b.html

or you can just order from cheap turbo or someone similar and roll out, lol

 

Hopefully I can shed a little light on the subject a bit.. *Cracks Knuckles before typing*.

Ok. The T3/GT40 is a bit of a combination of several possible setups. First off, the compressor wheel that is used is the GT40 compressor wheel. This wheel is used in the famed SC61/GT35E/GT35R setups that are well-known for their high power capacity at the upper powerband, but can still allow for lower end torque. It is extremely versitile, but the best combination for cars over 1800cc of actual displacement with a longer stroke (if possible).

<u>Compressor wheel GT40 Based on the SC61:</u>

Inducer Size: 2.416 inch = 61.3664 millimeter
Exducer Size: 3.227 inch = 81.9658 millimeter
Trim size: 56




This is in the "E" compressor cover that currently only Precision offers as its main housing choice. Precision casts its own black sand housings to create this configuration. This one was modified with a ceramic coating on the compressor side to keep exogenric temperatures down and the turbo to look its best.

Below is how it is currently offered from Garrett in the GT40 or GT35R form. The "S" cover is the standard configuration.



Here is with another choice in powder-coating that was done for a client




Here's where the differences lie in terms of horsepower and torque characteristics.

Below is an example of variations in turbine choice. Please note how I did not mention anything about TURBINE HOUSING in any of these examples. Simply changing housings on turbine wheels do not create drastic changes to custom characteristics with the turbine wheels themselves.

For example, below is the Stage III wheel 2.559" exducer that is used for a more quick responsive street setup for a good torque band, but with a little sacrifice in top end power once pushed above 18psi.



With this particular turbine wheel, this turbo can be pushed to about 470whp before ambient heat serious increases and turbine efficiency decreases.

This one contains the .63A/R turbine housing. Changing this to a .82A/R simply shifts the location of the powerband of the turbo about 400-700rpms depending upon the application, so lag does increase, (especially to our lower displacement motors) but only slightly.

Here's an example of this used on an 84.5mm GE sleeved GS-R engine with stock cams and cleaned up head with simply a valve change (Please disregard the "LS" on the sheet)




Beyond this point, (about 23psi) thermal temperatures were getting dangerous, and this particular person underestimated his need for power. This particular turbo was still VERY potent in the street, but he unfortunately didn't give credit to the fact that he had more torque in this application than his following one the next year, in which this was changed over to a much higher hp application. (He made the mistake of believing that More power=Lower ET, and didn't have the driving skill to use the power effectively.) But look at the entire powerband of this turbo for one that utilizes torque in the stock 87.2mm stroke of the GS-R. This one was simply amazing. He started initial spool at a Scant 2500rpms. This uses a very nice broadband with the turbine wheel, while the compressor wheel took over in the upper band.

The other example is a larger Stage 5 wheel, with a much larger exducer. This is mainly used on .82A/R applications, in cars that TRUELY are 2.0+ litres, with at least an 89mm stroke, and 84mm bore. The additional stroke helps the larger wheel adjust correctly for better initial pressure, and can still have a good powerband.



This one was slightly customized for the larger wheel (This one was a rebuild, and is much easier to work with. (I typically DO NOT recommend this wheel in the .63A/R, but this was a custom rebuild. Pete hates to use 5-bolt housings. "Damn Yanks", according to him. )

The GT40 compressor wheel, does have its limits of over 700crank hp. I'm sure that there are many SC61s that have gotten close to that limit, (and will more than likely post here to try to correct me) but what needs to be understood is EFFICIENT pressure usage, not just maxing the turbo out as far as it can go. These examples are not part of the point at issue.

Hopefully this will give a good start as to turbo choices that you may consider..


Modified by TheShodan at 6:08 PM 6/16/2006


Modified by TheShodan at 6:16 PM 6/16/2006


Modified by TheShodan at 7:38 PM 6/16/2006

 

That kinda knowledge only comes from deep within the 36th chamber of shaolin

/thread

 

Personally I think a Ball Bearing Blowzilla or even a T3/67 or T3/60-1 will do close to 600whp if not over and the BB center section will help with spool.

for example I am using a T3/60-1 BB with stage 3 exhaust wheel and .63AR with an S compressor cover. at 14psi on my stock bore motor it did 401whp with full boost by 4500 or so

 

^^^^ Understood. But that means nothing if this is not about specifically the compressor wheel he was referring to. 600whp is 600whp, not everyone wants to do this..

60-1 is ok, but he was asking specifically about this wheel. A Ball-bearing cartridge changes the discussion entirely.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheShodan &raquo;</TD></TR><TR><TD CLASS="quote">^^^^ Understood. But that means nothing if this is not about specifically the compressor wheel he was referring to. 600whp is 600whp, not everyone wants to do this..

60-1 is ok, but he was asking specifically about this wheel. A Ball-bearing cartridge changes the discussion entirely.</TD></TR></TABLE>

I understand that but I was just throwing some options out there for him. all I was saying is that if he wants a GT40 turbo with T3 exhaust all he needs is a blowzilla with BB. that would pretty much be a GT40R with T3 housing right?

 

Not exactly. If you want to get Technical, the one shown is a GT3540 Journal bearing. If you change the cartridge, it would be the GT3540 w/ a Ball-bearing cartridge. It would not necessarily change the name of the turbo entirely. A GT40R uses an entirely different exhaust wheel. It can get confusing, I know.

Yes. there are plenty of other options. He was just asking specifically for that compressor wheel. Ball-bearing cartidges help with EFFICIENCY. Faster spool is simply a by-product of the design. If one can make a turbo with the correct combination just as well as a BB cartridge FOR WHAT HE NEEDS, why go through w/ a Ball-bearing cartridge? So in case he doesn't have the funds to replace it if something happens? (since Ball-bearing cartridges CANNOT be rebuilt) And just to say he has ball-bearing?

Sometimes, its just not necessary..


Modified by TheShodan at 9:00 PM 6/16/2006

 

Can you identify the turbine wheel in my 35R?

 

That is the standard 84 trim wheel used in a .63A/R precision turbine housing. Cartridge #714568-1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheShodan &raquo;</TD></TR><TR><TD CLASS="quote">That is the standard 84 trim wheel used in a .63A/R precision turbine housing. Cartridge #714568-1</TD></TR></TABLE>
Wow! this guy is good. wish I could get some anwswers like this when i posted.

 

heh, looks familiar.

 

i misread the title, i thought the question was for the 40r with a t3 turbine housing.

 

hey guys thanks for the help, so im guess this turbo is only good for 1.8-2.0 displacement motors....

 

If you have a 1.6 DOHC, it can still work, but it's really laggy comparatively to some other options.