twin turbo question - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 10 Old 03-24-2009, 05:28 PM Thread Starter
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twin turbo question

Has anyone ever used 1 turbo to push the other? We do it on our 2800hp tt pulling tractor but was wondering if it would be any good on a mustang with a 351. using 2 power stroke turbo's. 1 is a 1.10 a/r the other is a 1.00 a/r.


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post #2 of 10 Old 03-24-2009, 05:58 PM
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They do that on a number of production cars-BMWs Supras etc.
Give it a shot.
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post #3 of 10 Old 03-24-2009, 08:04 PM
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also the 6.4 powerstroke uses a system like that

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post #4 of 10 Old 03-24-2009, 09:26 PM
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Someone a couple years ago tried it out on tm.com but he sold the car before he worked the kinks out of it. At least that is how I remember things.

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post #5 of 10 Old 03-25-2009, 12:28 AM Thread Starter
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Quote:
Originally Posted by Battousai View Post
also the 6.4 powerstroke uses a system like that
I know they do that my dad has one just wondering if it would work well or be a waste of time and money.

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post #6 of 10 Old 03-25-2009, 12:44 AM
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Its a waste.

I'm assuming your using the smaller turbo to get the bigger one thats really
making the power spinning on the tractor

That is not needed on a 351W unless you're trying to put some
aircraft carrier sized turbo on it and make 3,000hp.

Street set-ups will spin up 2 small turbos in parallel just fine and make
enough power to split the block in two.

Euro guys tried it cause they have less displacement then a coke bottle
to work with.

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post #7 of 10 Old 03-25-2009, 03:04 AM
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Its called compound turbos. They work really good on diesels. But unless your trying to put 70PSI into your engine its a waste. Sequential twins would be better (Little turbo for low end, then big turbo takes over on top end) But would be a nightmare to pipe that into a Mustang unless you went with quad turbos. But with a proper single or twins you wouldnt have that problem anyways.
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post #8 of 10 Old 03-25-2009, 09:32 AM
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I am not even sure the euro people stuck with the idea. The Porsche 959 had a sequential(I believe) setup from the factory and years later when a way to import the cars stateside was found the importers switched them I think to twin setups because the boost response was better and they got more power.

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post #9 of 10 Old 03-25-2009, 12:59 PM
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The Rx-7 and the Supra had factory sequential units. If your looking to do a compound you need to respect the sizing in regard to the 1st and 2nd turbo. If your not looking to run some silly pressure ratio you can just put the correct sized turbo's on your engine. For those that lack displacement the compound is a good route if your looking for a broad powerband, but you need good wastegate flow and control to keep boost down.

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post #10 of 10 Old 03-25-2009, 05:37 PM Thread Starter
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The Rx-7 and the Supra had factory sequential units. If your looking to do a compound you need to respect the sizing in regard to the 1st and 2nd turbo. If your not looking to run some silly pressure ratio you can just put the correct sized turbo's on your engine. For those that lack displacement the compound is a good route if your looking for a broad powerband, but you need good wastegate flow and control to keep boost down.
Yeah, On our tt tractor we are running a 306 ci strait 6 engine with 96psi. Was just wondering if anyone has done it on a mustang for street duty. only looking for 12 to 14 psi on a 351 but I am not sure if 1 power stroke turbo is enough or not.


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