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Tractor Talk Discussion Forum

Turbo Charger

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Scott

06-22-2004 16:50:07




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How much pressure could you create if you took a turbo and spun it at 20,000 rpm's? I was always told that a turbo runs upwards to 80,000 rpm's. Just thinking about a project.




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Dr.EVIL

06-23-2004 14:40:58




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 Re: Turbo Charger in reply to Scott, 06-22-2004 16:50:07  
Actually the smaller turbo's spin 100,000 to 120,000 RPM, and the real little ones up to 150,000 rpm. 20,000 RPM would be just a little faster than they would run at idle speed.



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buickanddeere

06-23-2004 05:22:41




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 Re: Turbo Charger in reply to Scott, 06-22-2004 16:50:07  
The flow and pressure output from a centrifical turbine is not linear, not proportional to rpm like a positive displacemnt blower. The flow, pressure and power required to drive a blower increases with the square or the cube root depending on which factor. Don't know what you are up to, but a belt driven Whipple screw compressor off the supercharged Buick 3800 would be a consideration.



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Adam B.

06-22-2004 17:42:50




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 Re: Turbo Charger in reply to Scott, 06-22-2004 16:50:07  
I think that depends a lot on the specs of your turbo. A turbo is just a specialized supercharger that has its compressor spun by a turbine that scavenges energy from your exhaust. If you want to have more adjustability of the speed and pressure you might want to check out superchargers (interchangeable pulleys allow you to alter the speed and thus the boost pressure).

This site has a lot of turbo information and compressor graphs for a lot of different turbos. Good luck with whatever you're pondering.

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