How much boost on Boss gts turbo?

Cale

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Jan 6, 2008
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Ängelholm, Sweden
im almost sure its the stage 5 GTS gt61 bb i have.. ordered from suprasport, have tried to ask them for exact specs but havnt got an answer... if thats what u meant?
 

starscream5000

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Aug 23, 2006
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Okay, I dug out the email from greg back from 1/4/07, The stage 5 has a hot side A/R of .81, and like Greg already said, the compressor wheel is a genuine Garrett wheel, so all you have to do is go to their website and look up the physical specs of that wheel.

Gregg may be able to tell you what type of housings are on the turbo and what classification they are.
 

Toy-Rific

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Jun 8, 2005
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Cale;1048689 said:
im almost sure its the stage 5 GTS gt61 bb i have.. ordered from suprasport, have tried to ask them for exact specs but havnt got an answer... if thats what u meant?

You have a stage 4 exhaust wheel and the gts 60 compressior wheel. You should be at full spool around 4200/4700. You did not buy the ball bearing turbo so your spool is going to be higher.
Do you have your car running so you can drive it or still tunning it? How do you like the turbo??
Greg
Lipp
 

Toy-Rific

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starscream5000;1048711 said:
Greg, what's the specs on the stage 4's hot side?

They are the same housing on all of them. I do have a new housing that is a .53 AR that will be a stage 3 for replacement of the stock CT-26. It will have thrust and Ball Bearing center. The castings are being made now and I will have the first ones ready in about 8 weeks.
Greg
Lipp
 

Cale

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Jan 6, 2008
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Ängelholm, Sweden
Toy-Rific;1048703 said:
You have a stage 4 exhaust wheel and the gts 60 compressior wheel. You should be at full spool around 4200/4700. You did not buy the ball bearing turbo so your spool is going to be higher.
Do you have your car running so you can drive it or still tunning it? How do you like the turbo??
Greg
Lipp

no, that was the first order i made but then we changed it to ball bearing and 61... but maybe its still just stage 4?
 
Last edited:

Cale

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Jan 6, 2008
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Ängelholm, Sweden
recieved a spec list of my turbo from Jack at ss:

20 psi is pretty much where the turbo is "waking up". That turbo will handle 35psi
Here are the specs on your turbo
Stage 5
Dual Ball Bearing
GTS cover
61 trim
AR on LIPP housing .81
 

Toy-Rific

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Jun 8, 2005
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Cale;1048930 said:
recieved a spec list of my turbo from Jack at ss:

20 psi is pretty much where the turbo is "waking up". That turbo will handle 35psi
Here are the specs on your turbo
Stage 5
Dual Ball Bearing
GTS cover
61 trim
AR on LIPP housing .81

Like Jack said" I am getting old" I was wrong and you did up grade to the above turbo...
Greg
Lipp
 

Toy-Rific

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starscream5000;1048786 said:
I understand that, but do you know the size of the turbine wheel on the stage 4's?


If i am not wrong, the inducer is 2.559 dia and the exducer is 2.336 dia.
on the stage 4 or also know as the O trim/stage
Greg
Lipp
 

Cale

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Jan 6, 2008
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Ängelholm, Sweden
tried to boost her up a little today but its strange it wont rise.. i have the maft-pro boost control set to 25 psi but it will only boost to 20 psi and reaches that first at 4500 rpms... and i 1st and 2nd gear the boost only goes up to 15 psi... have checked for leaks but there aint no leaks =( when the turbo was new (it still is) then without bc the wg where at 15 psi but no when trying it only boost about 10 psi...
if someone are familiar with the t-pros bc then maybe could give me some tips
 

Toy-Rific

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Jun 8, 2005
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You may need to shorten the rod on the end of the actuator. By turning it so the length is shorter will give you more boost. Try that, give it 1 full turn to see what you get.
Greg
Lipp