[Diy_efi] Venturi effect crankcase breather

Matt Porritt porrittm at anet.co.nz
Thu Jul 10 05:53:45 GMT 2003


You're bringing other variables into it now.
Whats a sports bike, ram fed airbox, European, Japanese, modern, classic,
moving or stationary?

I should have stated 'Jap CAR' engines.

Are you saying a engine generates no intake vacuum relative to atmospheric
pressure??


On 10/7/03 5:23 PM Adam Wade wrote

> --- Matt Porritt <porrittm at anet.co.nz> wrote:
> 
>> Majority of Jap engines have the crankcase breaker
>> plumbed into the intake piping, so any vacuum the
>> intake system sees, the crankcase does also.
> 
> Have you measured airbox pressure on a sportbike
> lately?
> 
>> So, yes the engine does generate its own vacuum.
> 
> Not relative to atmospheric, it doesn't.
> 
> =====
> | 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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