I've got a lead on a Garrett TP38 that is local for $150. Its off a 99-03 7.3l Powerstroke with low miles. Its Specs Should be, .84A/R exhaust turbine housing And compressor side 1.0 A/R. What i would like to know is If that would work good on a Stock LS1 Long block. I'm planning on Starting fab on Front Mount turbo system late this fall and im trying to get a turbo before then. I only plan on 6 PSI on this motor.

 

Wheel sizes are much more important than AR's.

 

Not 100% sure but i've seen one or two people say its a 80mm compressor wheel.

 

The compressor wheel should be 59mm for the inducer. The exducer is 82mm but that doesn't matter when you are looking at a compressor map.

 

Heres a flow map for one of the tp38's http://www.thenebula.com/carpics/pics3/TP38ZOOM.JPG

How am i supose to read it?

 

Its essentially just a 60mm turbo. Its sucks for a LS1 motor....will spool fast, but fall off like a rock in the upper RPM's.

 

Yeah it will do 30 psi on the diesel, but all done at 4500 rpm. Not too hot for a LS1.

 

Bingo......never was meant to work well on a high flowing LS1 motor. A little worse then even a 60-1 which is pretty much crap at anything over 5000rpms. Minimum, I would suggest a high flowing 70mm with a proper sized exhaust turbine wheel, around ~80+mm or more. The turbine is the most overlooked part of the turbo world...

 

Alright. Any Turbos Out there perferably of say a stock car or truck that would work good? I'm trying to keep prices down when i can. I know you can't go cheap on a turbo build though.

 

If there was everyone would be buying them...

I would say the tc76 from dr turbo is going to be your best bang for your buck with a warranty and will work great.


Chris