Re: [Amc-list] rear mount turbo

[Frank Swygert <farna@xxxxxxx>]

You'll see the numbers in the next issue of AMC, which you should be getting later this week. You are correct in what you're saying (as is Ken). Thats why you can't make 30 psi of boost from a remote mount turbo, the limit seems to be 16 psi with a more realistic goal being 6-12 psi. If you need/want more psi you have to get closer to the intake manifold. The point is it's so much easier/cheaper to mount it in the rear, and if you only want a modest amount of boost anyway there's no reason not to. It's power that's going out the tail pipe, so it's virtually free power anyway! You're just not going to be able to harness as much so far from the heat source. 

All supercharged WWII radial engined airplanes use a remote mount turbo. A few V-type planes did, most notably the P-38 Lightning. The turbos are the round things on top of the tail booms about 7' behind the engines. I have no idea how much boost they produced, but they were used more to prevent loss of power at altitude than to boost power at low altitudes. What you see on top is the air intake -- no filters! 

-------------------
Date: Mon, 17 Dec 2007 18:34:36 -0800
From: Tom Jennings <tomj@xxxxxxx>

-- Ken Ames <ameskg@xxxxxxxxx> wrote:

> > ...but as the exhaust cools it looses velocity. The farther the turbo the
> > cooler/slower the exhaust.
> >
> > right??
>   

Yeah, and the energy drops of really fast. The energy is in the heat that 
makes the gas expand. Apparently it does work, but I'd like to see real 
numbers, not just seat-of-the-pants claims. I'm skeptical... but I'm 
willing to be wrong.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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