[Diy_efi] crankcase vacuum control

[Alexei Pavlov]

Je n'y ai jamais pense (une fois de plus). Tu connais ce probleme ?


jackv at ambassadorprograms.org wrote:
> 
> Greetings, Dave,
> 
> Most all turbo and high-rpm NA racers run high (10-15")crankcase vacuum.
> Ford Motorsports has a good unit.  You can pick up 30-40hp on a strong
> engine through reduced pumping losses.  The pistons don't have to compress
> the crankcase atmosphere on their way down.
> 
> The most important factor for turbos is it keeps the oil out of the
> combustion chamber and thus helps prevent detonation under high boost.
> 
> thnx, jv.
> 
> -----Original Message-----
> From: Dave [mailto:dave at lotuscarlton.demon.co.uk]
> Sent: Saturday, April 26, 2003 2:54 PM
> To: gmecm at diy-efi.org; diy_efi at diy-efi.org
> Subject: [Diy_efi] crankcase vacuum control
> 
> Hi all,
> 
> Has anyone tried controlling crankcase vacuum? Either by pump and a
> release valve using the ECM or by passive valves (PCV's)
> I hear of some good hp gains. My particular app is turbo'd and I had
> wondered do I need to reduce or increase the vacuum as boost builds?
> 
> Thanks
> --
> Dave Evans
> LO203
> Lotus Omega Twin turbo, S6, 377Bhp, 415ft-lbs
> 
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