Alright, I'm upgrading turbos because...well who knows I want more power i guess.

either way, I'm going with something with a 67 compressor, but there are so many hybrids right now, that it leads me to discuss how to pick the appropriate wheel that is right for my lag desire.

so what I considered:
gt3567r
which has a 68mm 84trim turbine wheel per precision's website
gt3767
which has a 72.5mm 84trim turbine wheel per precision's website

PT67r
which has two different Ptrim wheels:
P-trim 2.920"(Inducer) 2.542"(Exducer) 76(trim)
or
P-trim 3.110"(Inducer) 2.695"(Exducer) 70(trim)

I've talked with Art, Stan and Ken, they all said the gt3567r just has too small of a turbine wheel.

Stan suggested the 3767 which seems pretty nice, and a step up form the 35r turbine but with a 67mm inducer for the compressor, just as the others.

Art suggested the BB pt67

Ken suggested BB ptrim/t04r.

i have the gt3561e right now and top end is chocking off due to the .63ar and among other things.

Goal is atleast 600whp off boost alone, going for 700 with the nitrous but the fuel pump shoudl max out at 650ish.

regardless, I want to understand more about turbine wheels and how they can help support different power levels on the same compressor housing/wheel. I think too often people think about compressor wheel alone and miss out on turbine housing facts. especially considering lag characteristics associated.

 

anyone know anything?

 

random picture why everyone browses but doesn't respond

 

I've been pretty impressed with the GT40 turbine wheel.

 

well... i forgot, i'm limited to t3 frame... if there was a way to get a gt40 in a t3, i'm there.

 

If your goal is 600whp on turbo alone. I think the straight gt35R would be the best powerband. Just thought i'd throw that in there. Also, why are u stuck on a 67mm compressor wheel?

 

The difference in spool between the gt35r and the TO4R(T67) is maybe 400-500rpm.....Given that its a bb TO4R....The topend will be much better with the TO4R as well compared to the GT35R...

 

All the turbo's you've listed are good for 600whp. If i were you, i would choose the GT3767. But its doesnt get made anymore. .
I'm also not sure the 70trim P-wheel will fit in a T3 housing.
I also asked FR about an comparision of the GT3567R and the PT67 H.O flowing capabilities, but no respond on that. I still cant beleive the GT35 turbine flows the same as the H.O (p-trim 76trim) as FR says.

Andy

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PeakBOOST &raquo;</TD></TR><TR><TD CLASS="quote">The difference in spool between the gt35r and the TO4R(T67) is maybe 400-500rpm.....Given that its a bb TO4R....The topend will be much better with the TO4R as well compared to the GT35R...</TD></TR></TABLE>

Yes, I understand, but how does one justify 400-500 rpm spool difference for more top end?? Instead of the bb T04R, why not just go gt42R and it'll have about 400-500 rpm spool difference from the To4R with much better top end right? Paul

 

Seriously though, there's probably no more than 500rpm difference in spool between any of those, who cares. 500 rpms of spool is nothing, what's way more important is transient response, the response after a shift and such. That's where the ball bearing turbos generally perform alot better than the journal bearing turbos. My recommendation would be a straight 4088r. Why do you have to stay with a T3 housing? You like having a 4 or 5 bolt downpipe flange? lol

 

The master has spoken
I will stop now! hahah.
Paul

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">My recommendation would be a straight 4088r. Why do you have to stay with a T3 housing? You like having a 4 or 5 bolt downpipe flange? lol </TD></TR></TABLE>

well, i didn't want to buy a new manifold and cutting off the t3 flange and just welding a t4 flange on isn't really the right way to do it. plus it always takes 3 months once you attempt to find a new manifold and i wnat to enjoy the rest of the season.

last night the car did go 7.4@101.8 at the local 1/8th.. can't get it to come out of the hole for anything and I found out that my ERL block is a little loser than my old block as my endyn catchcan was starting to puke everywhere. so time for more crankcase vents as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboTegB18c &raquo;</TD></TR><TR><TD CLASS="quote">

Yes, I understand, but how does one justify 400-500 rpm spool difference for more top end?? Instead of the bb T04R, why not just go gt42R and it'll have about 400-500 rpm spool difference from the To4R with much better top end right? Paul</TD></TR></TABLE>

lol

 

well ill give my input... ok i was running a t3/t67 ho. that ate a vacum line so i got the t67bb and used my t3 housing on it.. ive only had it on the car for like 1 week
and i love the ball bearing boost picks up alot quicker after shifting. im in the same boat you are with staying t3.. the exhuast is goin to hold you back from making a ton of power but on my car with the t3/t67 ho .82 i made 558whp at 20psi

 

i think that's another reason I want to move to a BB center as well, last night the respool between shifts was alot greater on my car than my friends h22a with a gt3567r.

 

I just got a new turbo from TheShodan.

It is a T3 footprint, 3" polished discharge w/ P-trim wheel that flows like the GTS wheel @ .xx A/R, .70 A/R comp w/ 4" ported/polished inlet and will make upwards of 700whp+. A lot of work has gone into this turbo.... custom wheels are just the beginning of this turbo....

Full BB CHRA makes full spool @ about 4800rpm and @ 25psi the output of the turbo is only 90deg F

Here are some pics of the "Red Pill Super GT66"







Contact "TheShodan" for more details as he was the creator of this bad boy


Modified by tepid1 at 3:12 AM 6/28/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tepid1 &raquo;</TD></TR><TR><TD CLASS="quote">Full BB CHRA makes full spool @ about 4800rpm and @ 25psi the output of the turbo is only 90deg F

</TD></TR></TABLE>

With what inlet temp?

 

i don't believe in mystery turbos, i'm sure people have done some wild stuff, but how the hell are people putting a GTS wheel in a t3 housing?
and exactly what are the specs of this turbo? other than a new called turbo of gt66
and 25psi only outputing 90 degrees would be impressive.

 

Thanks Tepid1,

Housing wise, this is very similar to the GT3567R with a couple of custom tweaks to the exhaust wheel, but even more responsive than even the BB version.

seen4ever:
The T3 setting holds back a few things in terms of your options, so you may not have much of a choice without having to change to T4. Sometimes you pay the price for more power, by making some changes.


Modified by TheShodan at 9:32 PM 6/26/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by seen4ever &raquo;</TD></TR><TR><TD CLASS="quote">i don't believe in mystery turbos, i'm sure people have done some wild stuff, but how the hell are people putting a GTS wheel in a t3 housing?
and exactly what are the specs of this turbo? other than a new called turbo of gt66
and 25psi only outputing 90 degrees would be impressive.</TD></TR></TABLE>

Unflrotunately "mystery turbos" kind of exist with many of us because of the fact that we put a lot of R&D and even some customization work with these applications to make sure that they are RIGHT for the customer themselves. As a designer, many of us companies and organizations worry about "theft" of this type of intellectual property. We give these specs to the client of course, for their knowledge and piece of mind, but most people don't like to advertise specialty turbos for fear of that type of repraisal.

There are some normal applications that have different names for the COMPANY'S sake of having a differentiated product associated with their name.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tepid1 &raquo;</TD></TR><TR><TD CLASS="quote">I just got a new turbo from TheShodan.

It is a T3 footprint, 3" polished discharge w/ GTS wheel @ .xx A/R, .70 A/R comp w/ 4" ported/polished inlet and will make upwards of 700whp+. A lot of work has gone into this turbo.... custom wheels are just the beginning of this turbo....

Full BB CHRA makes full spool @ about 4800rpm and @ 25psi the output of the turbo is only 90deg F

</TD></TR></TABLE>

Wait a min, GTS wheel, as in 42Rish turbine wheel? Also, when the spool numbers are figured on this turbo, what are the specifics in the application? What motor and manifold are being used? Also, nobody answered my question on what the inlet temps are when the outlet temps are 90 deg. F at 25psi...

 

shodan,

i can understand wanting to protect your R&D, but i like compressor maps or dyno graphs with boost plots. as what was described for your turbo and then to say spool similar to a gt35 makes it pretty challenging.

its just the same though, FR talks alot about thier gt3567r, where precision won't even build such a turbo, so you get alot of people talking about different turbos, where one vendor loves something and another hates it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

Wait a min, GTS wheel, as in 42Rish turbine wheel? Also, when the spool numbers are figured on this turbo, what are the specifics in the application? What motor and manifold are being used? Also, nobody answered my question on what the inlet temps are when the outlet temps are 90 deg. F at 25psi...</TD></TR></TABLE>

Topmount manifold, 4" DP, GSR @ 81.5mm.... and yes the P-trim wheel that flows like the GTS wheel in a T3 housing.

I don't remember the temps.... TheShodan will have to answer that one for me because I don't have the paperwork in front of me.


Modified by tepid1 at 3:13 AM 6/28/2006

 

what kind of cams? that's a relatively small block engine... any fancy headwork?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by seen4ever &raquo;</TD></TR><TR><TD CLASS="quote">shodan,

....as what was described for your turbo and then to say spool similar to a gt35 makes it pretty challenging.
</TD></TR></TABLE>

Actually spools better than the 35R....