is this t04B TOO big?

[kerist]

compressor a/r of .60 and a turbine a/r of 1.52.

I was curious because I know the t3/04E taps out at roughly 3K? well, my setup should be good for a safe 6500rpm pulls. So, I can also get my hands on this sucker and I wanted to know if it was seriously TOO much turbo for our applications.

I know I can replace the turbine side, and I wanted to know what would be recommended?

Tiago, are you not going with a t-61 trim turbo anyway?

Any insight would be great guys, and for future reference, can someone tell me what the heck the numbers really mean?

such as the a/r? And what exactly a 1.52 is a ratio of? As well as the compressor side of .60, what is this a ratio of?

Thanks

[Shane]

ull have lag from hell.......my turbo is .50 compressor and .82 turbine and on 9-10psi im runnin 12.50's at 108

[kerist]

What is the turbo that you are using for your application? What is the rev-range that the turbo actually "kicks in".


Is the compressor side reasonable? I can always swap out the turbine side, right? Ideally (excuse my lack of knowledge when it comes to turboes) one wants a smaller turbine side with a larger compressor side?

Finally, how much power does your v6 make? Oh, I've only got a 3.4L by the way.

Kerist

[kerist]

What will it cost me to convert the turbine side of my turbo? What size wastegate is appropriate for a turbo (compressor .6/ 1.00 turbine)?

Finally, will a set of 24lb/hr injectors be sufficent, as well as a stock Lt-1 TB?

kerist

[Tiago]

more then you want to spend. If you awnt to buy a turbo buy the RIGHT ONE!

that turbo wont wokr very well if at all.

the hybrid To4Es we put in our kits pull to 6500 no problem.

[BadAzzRS]

I have love\hate for way GM designs there engines. So many nice things, so many uhhhhhggg things. They seem more to make hella power from a turbo.

[kerist]

I was told that it would cost roughty $100-$145 to replace the turbine side? I mean I can get this thing for a real smoken deal?

[kerist]

Besides, I've for a healthy 350 it can go on if I cannot use it on my 3.4L.

[oil pan 4]

a/r = Aera and radious ratio
Raito, a "/" and a ":" are all other ways to say division.
To get a/r you find the aera of the nozel ring for you turbine (the thing that directs the gas on to the turbine wheel) or the divergent diffuser (the thing that takes the high velocity air off the compressor wheel and turns it into slower moving pressureized air) of the compressor and divide it buy the radious of the turbine or compressor wheel.
The a/r #'s help you figure out how much air the turbine of compersor will move.
These standardized measurements have been aroud for a long time.
9th grade math if I rember right.
It is good for compressors and turbines.
A nother one you will here is trim like a 46 trim or a 70 trim compressor or turbine wheel.
Take the aera of the inside of the wheel and divide it buy the aera of the out side. You will never have a trim of greater than 1.
That will give you an Idea of how much air and at what pressure it will move it.
If You have a 80 trim compressor, it will move a lot of air but won't make a lot of pressure.
If you have a 46 trim it will run say 30 some psi but not nearly as much air flow as a 80 trim compressor of = size.
Hopw that helps.

[kerist]

Thanks a lot this did help. Final question is the actual cost of replacing the turbine side. I would assume that I would get a reasonable deal if the shop that does it keeps the original turbine housing? The turbo has 0-miles on it at the moment, so I would imagine that it would have some value to a turbo shop.

[Teufel Hunden]

Originally posted by kerist:
Thanks a lot this did help. Final question is the actual cost of replacing the turbine side. I would assume that I would get a reasonable deal if the shop that does it keeps the original turbine housing? The turbo has 0-miles on it at the moment, so I would imagine that it would have some value to a turbo shop.

All the stuff you're asking is relative to where you're getting the housing, and where you're getting it done. I'd expect to pay anywhere from $100 to $250 on the housing alone. I just switched the exhaust housing on my T4; it cost me $210.