twin setup - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 11 (permalink) Old 02-26-2010, 10:08 PM Thread Starter
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Thumbs down twin setup

I was in class today looking at a DP mag and this idea hit me... could you make a twin setup while using your stock turbo like the kit ATS has for sale for the cummins. And if mso how big could your second turbo be... I was thinking maybe like a 71 or some where close to that. Has anyone ever done this or thought about it?

06 Cummins air, fuel, slipping tranny
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post #2 of 11 (permalink) Old 02-26-2010, 10:16 PM
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Re: twin setup



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post #3 of 11 (permalink) Old 02-26-2010, 10:23 PM
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Re: twin setup

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Originally Posted by cmont58 View Post
...Has anyone ever done this or thought about it?
Yup, long time ago. It's simply not worth messing with a stock turbo. It's barely adequate for it's intended purpose as it is now...
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post #4 of 11 (permalink) Old 02-26-2010, 10:38 PM Thread Starter
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Re: twin setup

Thanks for telling me that before I beat my head up trying to figure it out. Is the turbo on a cummins that much better?

06 Cummins air, fuel, slipping tranny
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post #5 of 11 (permalink) Old 02-26-2010, 10:49 PM
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Re: twin setup

i might sound stupid but isnt the inlet larger not sure if that has anything to do with it


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post #6 of 11 (permalink) Old 02-26-2010, 11:23 PM Thread Starter
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Re: twin setup

I dont know maybe they do but I just thought it would be kind of cool to try it and it would be more affordable. Maybe I should start paying more attention in class instead of day dreaming about what to do to my truck.

06 Cummins air, fuel, slipping tranny
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post #7 of 11 (permalink) Old 02-26-2010, 11:39 PM
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Re: twin setup

Biggest problem is the stock turbo is too restrictive on the exhaust side. It will make enough boost to make power, but at the cost of high parasitic loss (backpressure/heat).

A turbo making equal boost with less backpressure will make more power.....at the sacrifice of slower response (spooling).

You can push the stock turbo out of its map (happy place) with stock AD's.

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post #8 of 11 (permalink) Old 02-27-2010, 12:01 AM
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Re: twin setup

I thought I read where Bean messed with this for funny a while back. IIRC he did not wastegate it and went thru a number of stock turbos. Don't knwo if anyone set it up making sure to limit boost to keep the stocker alive and see what they got. Anyone else recall this?
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post #9 of 11 (permalink) Old 02-27-2010, 01:09 AM
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Re: twin setup

71mm can be spooled just fine as a single so it would be pointless for a primary on compounds.


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post #10 of 11 (permalink) Old 02-27-2010, 02:43 AM Thread Starter
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Re: twin setup

I was just wondering and I think for what I have done to my truck a 71 is alittle big. I am looking at the BD turbo

06 Cummins air, fuel, slipping tranny
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