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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Turbo Charging D6 9U

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Ray Gardner

02-19-2005 18:27:34




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I just built a new exhaust manifold, Is it suppose to be split inside, Like 4 ports going to one side of the Split Exhaust housing and the other 2 going to the other side, My Turbo is a T1210 It had a 157 Exhaust housing, Turbine barely turned wide open, Now I have a 87 Exhaust housing, It seems to turn really good, But under full load I still only recieve 5 lbs Boost, The compressor housing is quite wide, 4 in inlet 2 1/2 outlet, Can anyone help, I need a picture of what fits and some specs,
Thanks Ray.

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buickanddeere

02-26-2005 02:42:52




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-19-2005 18:27:34  
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Ray Gardner

02-21-2005 08:58:20




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-19-2005 18:27:34  
Bob I will let you Know what I come up with to fix this problem
Thanks Ray.



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Bob/Ont

02-22-2005 05:20:51




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-21-2005 08:58:20  
Ray, just reread your post, You built a new Exh manifold. If you made the new one smaller it would work better. The manifolds on turbo engines are choked down to move the exh to the turbo faster. The 3/3 split is not likely that critical on a slower RPM engine. The split divides the "pairs" of cyls 1&6,2&5,3&4 apart to give more time between exh pulses and better breathing. One thing it might affect is the two halves enter the turbine housing 180 deg apart. I don't know if the solid open port would share the exh evenly or if it would affect turbo speed or not. If you have black smoke at full load the turbo is not working right, if you have a clean exh at full load you don't have enough fuel to make enough heat to drive it I think.
Later Bob

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Bob/Ont

02-19-2005 18:48:04




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-19-2005 18:27:34  
Ray, what are you calling FULL LOAD? It isn't full throttle in neutral. You have to be pushing a load with the blade and then you should get an atmosphere 15PSI, 30 " HG or 100 Kpa. Another thing that enters into it here is have you adjusted the Rack Setting to that of a turbocharged engine? A turbo gives you more air so you can burn more fuel completely. The NA fuel setting will not give you full boost.
Later Bob

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Ray Gardner

02-19-2005 19:09:07




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 Re: Turbo Charging D6 9U in reply to Bob/Ont, 02-19-2005 18:48:04  
Thanks Bob
I have reset the fuel setting, I am also pushing a full load of dirt full throddle and am only getting 5 lbs boost.
Ray.



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Bob/Ont

02-19-2005 20:01:23




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-19-2005 19:09:07  
I think you are only getting 1/3 of what you should have Ray. Try a 0 to 30 PSI gauge if you have one to make sure it is reading right. What engine did you set it up to? I can check the specs if you give me a serial# of the turbocharged engine you used to get your settings.
Later Bob



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Ray Gardner

02-20-2005 10:51:55




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 Re: Turbo Charging D6 9U in reply to Bob/Ont, 02-19-2005 20:01:23  
Bob That was my thoughts so I bought a new 0 to 30 guage still the same pressure, I have axcess to those same books, I checked the fuel settings on any engine that size that had a turbo like a cat 12 grader D6 10K Early 966 so I think I'm fairly close. I was a field service Mechanic for Cat for many years, You would think I could figure this out.
Ray.



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Bob/Ont

02-20-2005 20:57:19




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-20-2005 10:51:55  
Ray, if the ground is covered with snow and no dirt is blowing around, try it again with out the aircleaner and see what you get.
Later Bob



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Ray Gardner

02-20-2005 21:14:49




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 Re: Turbo Charging D6 9U in reply to Bob/Ont, 02-20-2005 20:57:19  
Hi Bob
I will try that, I hope thats not it sense I just bought and installed a new 500.00 dollar Donaldson Air Filter.
Ray.



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Bob/Ont

02-21-2005 08:26:17




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 Re: Turbo Charging D6 9U in reply to Ray Gardner, 02-20-2005 21:14:49  
It likely isn't then Ray.Just another thought too. The old turbos where huge compared to todays more efficient ones. I wonder how a modern turbo responds to the older low rev engines exh. It's heat that drives them not flow but the temp X volume of exh gas has to match what the turbo needs. Later Bob



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