2011 Superduty Down Pipe - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 30 (permalink) Old 10-14-2009, 11:11 PM Thread Starter
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2011 Superduty Down Pipe

I crawled all over th new Superduty in the Rain on Sunday at the Texas State Fair. I was shocked to see the down pipe for the Turbo!! It was crimped in the middle just like my old 97 power stroke was!!

It looks like hte after market guys are going to need to get everyone a new down pipe for sure!!!!

The Turbo seems to sit between 1/2 to 3/4 of the way back on the valley betwwen the heads. The engine bay is completely full!! It almost looks like a Nasa project under the hood.

It will be interesting to see how the truck performs.

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post #2 of 30 (permalink) Old 10-15-2009, 01:24 AM
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Im interested to see,why in the hell cant ford see what it takes to make some more Hp and not have it crimped on the down pipe for the Turbo....


I cant wait to see,I hope to have one of the 1st one's off the line.

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post #3 of 30 (permalink) Old 10-15-2009, 02:22 PM
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Is it a 3" crimped pipe or a 5" crimped pipe? If it is larger, it won't matter. As long as there is sufficent interfacial area.

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post #4 of 30 (permalink) Old 10-15-2009, 02:27 PM
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Originally Posted by ralphinnj View Post
Is it a 3" crimped pipe or a 5" crimped pipe? If it is larger, it won't matter. As long as there is sufficent interfacial area.
But wouldn't a restriction, any restriction, change things? asking because I don't know.

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post #5 of 30 (permalink) Old 10-15-2009, 02:33 PM Thread Starter
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It looks like a 3 inch, and it looks like it is smahed almost in half. If any of you have ever seen the 96-98 down pipes, they where horrible!! I will try to get a picture of it today, I am goin back out there.

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post #6 of 30 (permalink) Old 10-15-2009, 02:34 PM
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Yes, when comparing, say, a 3" round to a 3" round that has been crimped, he11 yeah! But if you create essentially an ovular shape to get through a narrow opening that has as much interfacial area as the round shape, you lose very little. Key is how abruptly the transition is made, so if Ford went with a cheaper, crushed approach, it will have kinks and will make it possible for aftermarket vendors to improve the design. Having a big fat round DP is great, but my guess is there is not enough room and that is why they flattened it.

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post #7 of 30 (permalink) Old 10-15-2009, 02:36 PM
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Another way to look at this is that if they used a 3" pipe and crimped it and they are making 400HP, we will probably see a nice pump by improving the breathing with a larger, better-flowing DP and unrestricted exhaust pipe.

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post #8 of 30 (permalink) Old 10-15-2009, 02:48 PM
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remember the turbos on the 6.7L SHARE the same shaft.

and dont forget this is an INSIDE OUT motor....the in-take is on the
OUTSIDE of the head (where conventional motors have the exhaust manifold).

the EXHAUST exits from the VALLEY or INSIDE ports of the Heads.

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post #9 of 30 (permalink) Old 10-15-2009, 03:04 PM
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Don, are you saying that due to the location, there simply is not a lot of room, so crimping is mandatory?

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post #10 of 30 (permalink) Old 10-15-2009, 03:24 PM
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no im just saying that the positioning of the turbos is likely related to the shared shaft.

the pipe make be crimped simply because of the BUILD order & how the insert the motor
into the frame/truck body.

clearly they dont have to crimp the pipes (look at all the aftermarket solutions available
for prior years)...why they do it is beyond me.

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