[Diy_efi] Venturi effect crankcase breather - crankcase vacuum

[Adam Wade]

--- arnie <arnie_ at charter.net> wrote:

> Is that where you are coming from?

Is what where I am coming from?

> It was not stated, having too much vacuum WON'T
> adversly affect engine life. 

No.  It was stated that having too litte pressure in
the crankcase WILL adversely affect ring life.

> It should not be assumed the correct amount is
> harmful as well.

What is the "correct" amount?  To whom?  Why?  What is
"harmful"?

> It really is of little concern what happens to 
> the ring with too much vacuum,

Well, most people who operate motor vehicles have
different priorities than you, apparently.

> I'm more concerned at what level this condition
> occurs.

I've already covered that in previous replies.  For
your application, I suggest you build a half-dozen
test engines and test them all at various levels of
crankcase pressure until ring seal has dropped a set
percentage, and then record the number of revs to get
from a fresh motor to that point.  Then you will know,
for your application, what the bell curve looks like.

> As stated in an earlier post, 12-15 in. Hg. is 
> used successfully for track use.

Which has nothing to do with how long the engine will
last, or how well the rings are sealing.

> I have not seen evidence as that being too
> much.        

You seem intent on arguing in circles.  Believe what
you will, and do all the experiments you wish to
gather your own data.  You don't seem to want to make
any distinctions besides your own (or lack thereof).

=====
| Adam Wade                       1990 Kwak Zephyr 550 (Daphne) |
| "It was like an emergency ward after a great catastrophe; it  |
|   didn't matter what race or class the victims belonged to.   |
|  They were all given the same miracle drug, which was coffee. |
|   The catastrophe in this case, of course, was that the sun   |
|     had come up again."                    -Kurt Vonnegut     |

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