Re: [T2] Oil cooler lines

[al brase <albeeee@xxxxxxxx>]

George, Stan:
I'd second George's reasoning on this.
I believe the 911's cooler is on the scavenge side, so would not effect the
pressure on the supply side.
(Actually, I have one of these setups in one of my vast piles of GOOD STUFF,
waiting for the day I put a killer type 4 engine in my 67 912! I could look at
it  for someone's information if it would be helpful.)
Understand that the DM way that Porsche did this entailed about $1500 worth of
nice German hardware. Only 2 of the 20 or so type 2's I have owned cost more IN
TOTAL  than this oil cooler setup. I really have to question (along with Dr.
Tim) whether any of this is even necessary unless you are running 103mm big
bores!
Al Brase
69 double cab, 80 westy

George Lyle wrote:

>
> IN general, you want to keep the lines short, as the longer they are the
> more pressure loss you will get and therefore the less flow.
>
> That being said, if you do have to run long lines they have to be larger
> in diameter.  I'm not familiar with the Porsche setup, but I'll bet they
> either run large metal lines, or use us bypass cooler setup so that the
> pressure to the bearings would not be lessened.  Metal lines would be
> preferable as they would dump some heat themseleves and be less prone to
> deterioration.
>
> On cooler placement, don't assume that a location will provide airflow.
> The eddys and currents around a moving bus are hard to predict!  You're
> better off to provide postive airflow with a fan, along with some sort of
> duct to prevent hot air recirculation.  The hot air exhaust should be
> several feet from the inlet.
>
> Speculation session:
>
> The best oil cooling setup would simply take oil from the sump, run it
> through a cooler, and return it to the sump.  This would entail another
> oil pump or perhaps a dual pump as installed in the autostick bug.  This
> way the bearings would not have the restriction of the cooler in the
> path and would always see full pressure.
>