Adventures in Induction.... aka Turbo b7200

[Zingab7200]

Normally I would say don't judge the turbo by its physical size; use the specs. However, that is a huge turbo.
Blowing cold air thru a turbo will never make boost. Turbos are not only fans, they work by converting heat energy into mechanical energy. Shop vacs and unloaded diesels do not have enough heat to power a turbo. Any size turbo can be made to work with any size engine if enough heat is provided (or restricted).
If you repeat the test and load the engine to max and then start turning up the fuel you will eventually build boost. It might be way more fuel than you want to use and the exhaust temps might kill your engine.

Please tell me you did not run the turbo without an oil supply as your picture shows.

No. Or course not. I ran some temp lines for oil and air intake.

I had no idea heat was a factor of making the turbo work. I thought it was solely air flow.

My goal w this project. Is efficient power gains. While I do plan on adjusting fuel to be in line w air flow. I hope to not just turn it up endlessly hoping eventually to build boost.

The specs of the turbo are .48/.49. New one. Is .28/.35. ...

On to the good news. Some gauges arrived. Tractor has 50lbs of oil pressure

 

[JeffL]

I didn't really think you ran it without oil, just ribbing you a little bit. I did think someone may see that picture and try it on their project.
Sorry if I missed it in your earlier posts; what brand and frame size are your turbos. I can look for the performance maps, they are useful in sizing a turbo to an engine based on what you want for output.
Have you watched any of the tractor pulls on utube? Great example of too large turbo. Watch them work the fuel pump on and off as they spin up the turbo. Once they launch they build big boost from the heat. Some of these guys are reaching 200 psi.

 

[Zingab7200]

Theyre just some cheap eBay turbos

This is the only info I have on new one.

 

[JeffL]

How about an update?

 

[Zingab7200]

Sorry for no updates guys. I work at a pumpkin farm. And as you can imagine. It's a busy busy month for us. No days off all month. I'll get back to this project asap.

 

[JeffL]

I was hoping you were not proceeding without us! Do understand work getting in the way of play.