I've always noticed people taking about the different stage wheels they have, but what exactly does it mean? Is it worth it to upgrade to a higher staged turbine wheel? like a stage 3 or a stage 5? what are the benefits?

 

Depends on your setup. The larger turbine wheel will give you more top end power, but it will also spool a lil slower. Some setups just don't like the stage 5 wheel. I'm sure someone is goin to post a lil more technical answer, but that's it in a nutshell.

 

From what I've gathered the difference is in supported exhaust flow and efficiency. Higher "Stage" = Newer/Better.

 

so the larger stage means a bigger wheel? or its just more efficient?

 

The higher the stage has nothing to do if it's better or not or how effecient a turbo is. There are different stages so a turbo can be suited for different needs. It all comes down to the setup, even what kind of manifold you plan on running.

There are some manifolds out there that don't like the stage 5 wheel cause it produces too much backpressure. Also some setups just don't breathe enough to actually take advantage of the stage 5 wheel. That is the reason why Innovative created the Stage 4 wheel. To give the end user more options.

 

The angle at which the compressor side blades are also comes into play.

 

its primarily a diameter diff I believe. I'm sure the designs vary but there is a huge discrepancy in size. here is a stg 3 vs 5 and another pic of standard (sg 1) wheel.

 

what stage wheel is the super 60 t3?

 

super 60 is a compressor wheel. I think it was normally packaged with a standard or stg 2 turbine wheel possibly. Go on a mopar site and find out for us.

 

so should i just stick with a stage 3 wheel or get the stage 5. I'm looking at getting a t3/gt40. This would be for a built d-series sohc.

 

I'm going to use a stage 3 in a .48 housing, with a 50trim to4E, on my built D16. I think that will be nice for a street car. I will be reving it to about 8k so it will have a nice wide powerband.

 

I was told by Ken at Cheapturbo.com that with my setup (H22) that the stage 5 wheel will make me spool faster.

Also how can you tell if you have a stage 5 turbine wheel or not?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ozzyman &raquo;</TD></TR><TR><TD CLASS="quote">I was told by Ken at Cheapturbo.com that with my setup (H22) that the stage 5 wheel will make me spool faster.

Also how can you tell if you have a stage 5 turbine wheel or not?</TD></TR></TABLE>
measure it with a mic, then do the math ... should remain as a 76trim turbine wheel, but should have a larger exducer and larger inducer.
there is a size difference as well as the shap of exducer on the turbine wheel.
a stage 5 76trim t3 turbine wheel is a nice top end turbine wheel for small displacment motors...
allows for a nice amount of flow, less back pressure resulting in a gain, but also with its design its a slow spooler in comparison to the other 76trim t3 turbine wheels...

now the P trim t4 turbine is probly the best bet... its an awesome flowing wheel, with a slightly larger exdcuer and a nice sized major for a slightly better response.
you wouldnt think that of a t4 turbine wheel. But with more material, this only means more energy is needed to get that p-trim turbine moving... so its going to take a few extra tenths of a second to get it up to speed, but once it catches, hang the hell on... its a violent responding wheel... it responds violently once the gases start to flow.
with a 64.6mm exducer and 74.2mm major its prolly the best turbine wheel option for the small displacment guys... but thats just my opinion...
you can have innovative cut you a .48a/r or .63a/r t3 to accamodate a t4 p-trim or an o-trim turbine (also t-4, slightly smaller exducer, same size major, but the angle of the blades results in alittle more backpressure, but less lag)...


so anyways... this is about the 76trim t3 turbine family.
back to the subject at hand...
the specs for them is as followed:
Stage 5 t350: 2.795" major, 2.437" Exducer (mm conversion 71mm major, and about a 61.5mm give or take a few tenths on the exducer....)

Stage 3 t31 turbine: 2.559" major, 2.228" exducer. and conversion is 65.0mm major, and about 56.7mm on the exducer...

now to break it down...
the exhaust comes out of the manifold and into the turbine housing...
it hits the "major" first then out through the exducer portion of the wheel(which is what you can see fromt he discharge flange).
hope this helps...

Also the stage 2 is only a few one hundeths of a mm in size on each end in comparison to the stage 2...
and the standard t3 wheel aka the stage 1 is alittle more noticable...
but you guys need not worry about that ***** ****.



Also Big EDIT:::
the formula for finding turbine trim is as followed...
(Exducer^2)/(major^2) x 100 = turbine trim.

so (56.7^2)/(65.0^2) x 100 = trim

So (3214.89/4225) x 100 = trim
So .7609 x 100 = 76.09... like i said the t3 family is a set of 76 trim turbine wheels...
the P trim is actually close as well along the lines of a 75 trim
so there you have it...
its all step by step.
if your still having issues, then find some one to do it all for you.


Modified by GT61 this 1.8t at 7:53 AM 11/20/2004

 

Great info!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Oyvind Ryeng &raquo;</TD></TR><TR><TD CLASS="quote">Great info! </TD></TR></TABLE>

im going to need to read that a few more times thought to understand it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pip9 &raquo;</TD></TR><TR><TD CLASS="quote">

im going to need to read that a few more times thought to understand it... </TD></TR></TABLE>

Me too....

 

Im pretty sure the stage 5 wheel also has 11 blades where as the stage 3 only has 10

 

my stage 5 wheel has 10 blades...

here's a helpfull link..
https://honda-tech.com/zerothread?id=906957

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flip1199 &raquo;</TD></TR><TR><TD CLASS="quote">my stage 5 wheel has 10 blades...

here's a helpfull link..
https://honda-tech.com/zerothread?id=906957</TD></TR></TABLE>
hlepful?
eh not really.
but hey, the info in this thread is more useful

and my post back in june remains the same...
if you have a monster compressor with a tinny exhaust wheel expect to hit the surge line hard...
thats going to kill any spooling advantage that the stage 3 gave nyou.

 

this was the helpfull part i was talkin about..

"Basically, a Stage 3 turbine will spool quicker at the expense of lower power potential while a Stage 5 will be slower to spool but will offer greater power at higher rpm."