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  #1  
Old 08-13-2007, 11:04 PM
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Info on stock turbos?

Searched on here with no results
What are the specs on stock turbos in the early 80s
Say a 300D Trubo?

How do they compare to newer aftermarket turbos?

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  #2  
Old 08-13-2007, 11:12 PM
ForcedInduction
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They are Garret T3 or KKK K26. They are a traditional T3.

What are you trying to do?
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  #3  
Old 08-13-2007, 11:18 PM
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Turbo map for the T3


Edit: Guess this is for the 50 trim which is in the 300SDL
Attached Thumbnails
Info on stock turbos?-t3-diagram.jpg  
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  #4  
Old 08-13-2007, 11:20 PM
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The stock turbo is a 45 trim.
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  #5  
Old 08-14-2007, 12:10 AM
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Just wondering how one of these cars would change if a new aftermarket one was put in
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  #6  
Old 08-14-2007, 12:20 AM
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You would change how quick boost builds. Thats it.

The T3 is an ancient turbo, designed before WW2. Don't even consider it as a replacement. Look to the newer GT series.
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  #7  
Old 08-14-2007, 12:22 AM
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the T3 is that old? wow

Quote:
Originally Posted by BigBadJohn View Post
Just wondering how one of these cars would change if a new aftermarket one was put in
now you cant just slap slap any ole turbo on there... nothing is..."bolt up and go"

lots of research.. psssstttt.. I know of a place where putting big turbos on a 617 isnt sacralige
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  #8  
Old 08-14-2007, 12:39 AM
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Quote:
Originally Posted by ForcedInduction View Post
You would change how quick boost builds. Thats it.

The T3 is an ancient turbo, designed before WW2. Don't even consider it as a replacement. Look to the newer GT series.

Any specific models in mind? The Holset HX25 I am thinking of using seems quite hard to source. I would like to build boost faster and run no more than 17 or so PSI.
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  #9  
Old 08-14-2007, 12:49 PM
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Quote:
Originally Posted by ForcedInduction View Post
You would change how quick boost builds. Thats it.
The greater efficiency of the turbine and the compressor of newer turbos do up your power some all though its not a lot. The greater efficiencies create the same boost with less back pressure. Once you build enough boost so the waste gate is open there is less parasitic draw on the engine. Before you are up on the waste gate the boost pressures are higher for a given amount of back pressure so you recover more of that energy on the intake stroke of the pistons.

Quote:
The T3 is an ancient turbo, designed before WW2. Don't even consider it as a replacement. Look to the newer GT series.
The basic design may date back to WW2 but the compressor wheel and turbine designs date to the 70's and 80's. I agree if your going to shell out big bucks for a turbo go for a GT. I have more computing power on my desk today than all of Garret did in the 70's and 80's. I think the biggest advantage wit a modern GT turbo would be the much broader efficiency islands.
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  #10  
Old 08-14-2007, 10:11 PM
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Quote:
Originally Posted by ConnClark View Post
The greater efficiency of the turbine and the compressor of newer turbos do up your power some all though its not a lot. The greater efficiencies create the same boost with less back pressure.
Yes, but, the 1-3hp you would gain from efficiency alone wouldn't be worth the cost of replacing a good turbo.
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  #11  
Old 08-15-2007, 12:04 AM
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How would a little->big bi turbo system work? with Sequential Wastegates and intercooling/cryo?
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  #12  
Old 08-15-2007, 12:10 AM
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Lots of electronics.
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  #13  
Old 08-15-2007, 02:48 AM
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I can do electronics..what sort of electronics?
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  #14  
Old 08-15-2007, 08:43 AM
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Quote:
Originally Posted by PanzerSD View Post
I can do electronics..what sort of electronics?
I like blinky lights personally.
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  #15  
Old 08-15-2007, 12:07 PM
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Quote:
Originally Posted by ForcedInduction View Post
Yes, but, the 1-3hp you would gain from efficiency alone wouldn't be worth the cost of replacing a good turbo.
at todays fuel prices it may pay for itself after 5 years.


Quote:
Originally Posted by PanzerSD View Post
How would a little->big bi turbo system work? with Sequential Wastegates and intercooling/cryo?
Bi turbo is obsolete. VNT/VGT has surpassed it in performance and cost. If you want a good electronics project work out a digital control system for one of these. There are a lot of people interested in a VNT/VGT retrofit.

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white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
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http://ecomodder.com/forum/fe-graphs/sig692a.png
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