RE: 951 turbo placement, WAS->RE: Colors under the hood, longish (heat, crossflow heads)

[Henry Harper <hah@srv.net>]

On Thursday, April 09, 1998 1:39 PM, Lawson, Dave 
[SMTP:dlawson@service.ball.com] wrote:
> henry,
> <
> > If I recall correctly the 944 turbo takes this a step further by
> positioning
> > the turbo on the intake side. Cool.
> >
> > Frank
>
> Nope, Dad's 951 has turbo pretty low on exhaust side after a longish
> two-piece
> EM (starter is underneath/towards intake side), intake flow goes through
>
> intercooler in front over to the other side. It's a crossflow head,
> anyway,
> with the cam in a superstructure and cover on top of the actual "head".
> Distributor on front of cam, block canted at about 20 degrees, and it's
> all
> packed in there pretty good and tight.
> <
>
> Check out
>
> http://www.geocities.com/MotorCity/4944/
>
> and specifically
>
> http://www.geocities.com/MotorCity/3322/tp06a.jpg
>
> You can see that the turbo placement on the 951 is on the drivers side
> of the engine bay.
> -
> Dave Lawson

Well sure, ok, Dave, once you get all that other stuff out of the way (see 
above "packed in tight", not to mention "dark" and "scary"). So that's what all 
those extra exhaust pipes laying around the garage are from. What a lot of 
plumbing. You would think that I might know what a turbo looks like, rather 
than just see some flanges down there and "ass-u-me" and gosh, you can't look 
underneath the thing because it's so low. It's not even my car, yeah that's it. 
Would you believe that the 931's turbo was on the exhaust side? Right under 
that cooling duct. Pretty sure of that one, we did a radiator-cap swap on an 
'80 931 for the '86 951. That's where you lift off the radiator cap and drive a 
different car under it, put it back down.

What a nice 944 site, I'll have to tell Dad about that one. Where's the 
matching one for the 200q?

Speaking of a lot of plumbing, I think I read about some internal ceramic 
coatings in the EM, (felt like exhaust ports in the new head were coated with 
sumthin') but doesn't some heat (energy) get lost while going all the way over 
(lag) to the other side of the engine? And won't the hot side of the turbo and 
associated piping still heat soak the IM, which is just above? Maybe not as 
much as on the other side of the engine, and there just might be a heat shield 
there, I suppose.

to sum up: mea culpa, mea culpa, mea maxima culpa [auf English das bedeutet "my 
bad"]
Henry Harper
http://www.srv.net/~hah
1991 200 quattro, 87k, might know where the turbo is if it's close enough to 
bite me
1988 GTI 16v, 175k, spent some time under this one replacing the exhaust and 
there probably isn't a turbo around (if there is somebody put a pump in its 
spokes)