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Tractor Talk Discussion Forum

OT double turbo

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noidea

11-04-2007 18:39:44




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I have an old 12 valve cummins in a dodge i want to play with. I have a turbo off of a 466 that is collecting dust. Is there any way I can put that turbo in front of the stock turbo on the engine to make it spool better? Anyone tried anything like this before?




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Hoss in Maine

11-05-2007 17:22:40




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 Re: OT double turbo in reply to noidea, 11-04-2007 18:39:44  
Go for it! Add water injection though,lets yer engine last longer. while youve got the drill and pipe tap out add another nozzel and put propane to it.More bang for the buck so to speak,probably a big,big bang. Hoss,in my bomb shelter.



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ejr-IA

11-05-2007 08:12:57




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 Re: OT double turbo in reply to noidea, 11-04-2007 18:39:44  
Try a these web sites for some imformation www.bd-vfi.com,www.turbodieselregister.com



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James22

11-05-2007 07:32:10




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 Re: OT double turbo in reply to noidea, 11-04-2007 18:39:44  
Series turbos are nothing new. The larger turbo compresses the air before the smaller turbo. The smaller turbo then blows into the manifold or innercooler/aftercooler. Could also use a cooler between the stages which is intergal to Cat's design. The smaller turbo's turbine receives the engines's exhaust gas first. However this isn't for the faint-hearted. To do it corretly one should have the turbo compressor maps and properly match the components. Any performance improvement by just throwing on a spare turbo without any investigation would be sheer luck, and there is a reasonable possibility that performance at higher horsepower levels would be worse.

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02XLT4X4

11-05-2007 06:05:43




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 Re: OT double turbo in reply to 135 Fan, 11-04-2007 18:39:44  
Ford's twin turbo's don't feed each other though, besides I don't think there is such a thing as a turbo that is cheap to fix.



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Lumpy

11-05-2007 04:16:45




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 Re: OT double turbo in reply to noidea, 11-04-2007 18:39:44  
I know 2 guys that run "twins or stacked turbos" for several years on pulling tractors. One is a IH and the other is a AC. The same turbos for the last 3 seasons on both, no problems at all. Yes, the first turbo is smaller than the other by about a 1/4" on the wheel dia. But they make lots of power. Research it before you do it. Good luck!



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RobMD

11-04-2007 20:13:29




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 Re: OT double turbo in reply to noidea, 11-04-2007 18:39:44  
I think a turbo blowing into another turbo is the worst invention ever. If one goes, both go, and then all of a sudden your wallet is empty.

I won't touch one of those ford 6.4 twin turbos. Look at that sick son of a brick twin turbo... too complicated and too costly to fix



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Allan In NE

11-05-2007 08:59:21




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 Re: OT double turbo in reply to RobMD, 11-04-2007 20:13:29  
Hey Sport,

Think you're kinda playing Piņata with the old information hiway, ain't ya?

Allan



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NC Wayne

11-04-2007 18:57:14




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 Re: OT double turbo in reply to noidea, 11-04-2007 18:39:44  
Look at the new CAT engines, their running two turbos in series like your talking about. I"ve seen a few of them, but thankfully haven"t had to work on one yet. The one thing I see visually is one turbo is physically larger than the other. This tells me that you would have to be careful when twinning two of them in series to be sure the volume of flow for each turbo would be compatible with the other. Starving or over pressurizing one or the other of them would tend to cause a failure and being together, most likely, both are gonna catch pieces and be involved in any failure. Still if you"ve got an engine and a spare turbo to play with, and aren"t afraid of a failure, then go for it and let us know how it turns out. Good luck.

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