RE: Intercooler cooling

[Eaton Dave <dave.eaton@minedu.govt.nz>]

dave
'95 rs2
'90 ur-q

On Wednesday, July 22, 1998 10:15 AM, Brett Dikeman
[SMTP:brett@pdikeman.ne.mediaone.net] wrote:
> >the intercooler on the rs2 is at bumper level which is fine, but the
> ie, fed through the grille?

no, a separate grille below the bumper, a little wider than the front
above-bumper grille.

[snip]

> >the only downside of this location is the length of the inlet tract.
a
> do you mean the inlet tract for air to the IC, or turbo->IC->throttle
body
> length?

the inlet tract from the ic to the throttle body.

> 
[snip]
> 
> >shorter tract would help throttle response.  i personally consider
the
> >sport location to be a better one, but you'd need to work on getting
the
> >air out.  not sure whether the hood vents are really enough...
> Where's the sport one located?

the sport ic occupies the whole width of the front of the engine bay,
where the aux rad is with other i5's.  it's a big sucker...

> 
> 
> What's the RS2 IC look like?  Single-pass, like the 200q20v?  If you
> wouldn't mind, I'd be interested in the rough dimensions(ballpark
figure or
> quick ruler measurements would be neat.)
> 

the rs2 i/c is large single pass unit.  it is mounted below the front
bumper and occupies the whole width of the front of the car except for
about 10cms either end which is used for the oil cooler (lhs, facing the
car) and the water
radiator (rhs).

lhs is inlet to engine (ie. closest to the inlet manifold).  this is
perpendicular to the i/c, facing rearwards, it goes into a 90 degree i/c
hose for about 150cms until the steel inlet pipe. rhs is inlet from
turbo, and the pipe from the turbo crosses the front behind the front
cross member to get to the i/c.  the end-cap faces up (vertical) and to
accomodate this.

the actual dimensions are (approx i'm afraid cause, short of dismantling
the sucker i can't get more accurate numbers):-

total width is 600mm, with 500mm exclusive of end-caps. 
height is 180-190mm, and depth is 50mm.

> Audi managed to improve the IC design as time went on; they did when
they
> went from the 10v to the 20v.  One wonders if more improvements were
made
> with the S and then the RS2 cars.
> 

yes.  the s4 looks to have addressed inlet tract length, andpokes two
smaller ic's into the airstream at the front corners ...

> 
> ------
> Brett Dikeman
> brett@pdikeman.ne.mediaone.net
> ~)-|
> Hostes alienigeni me abduxerunt.  Qui annus est?
> Te audire non possum.  Musa sapientum fixa est in aure.
> Ita, scio hunc 'sig file' veterem fieri.
> ------
>