[Diy_efi] OT: Supercharger bypass valve location

[Stephen Andersen]

I don;t think the proximity of the bypass should cause a 
problem.  I am working on a draw thru using a twin-screw on 
my car, and the throttle body is mounted directly to a housin that 
is mountin directly to the SC inlet.

However, the vacumm signal for the bypass must come from the 
intake manifold, or from the piping after the blower (at least that is 
my understanding).

If you put the signal line behind the throttle plate but before the
blower, there will always be vacuum there and you will never get 
the bypass to close...

Steve

> -----Original Message-----
> From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
> Behalf Of Dan Zorde
> Sent: Monday, June 03, 2002 9:28 PM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] OT: Supercharger bypass valve location
> 
> 
> 
> Hi,
> 
> I'm hoping someone can help with some practical experience.  
> I'm working
> on a draw thru supercharger setup for fuel injecting my Fiat 
> 850 sport.
> The throttle body location is around 12" before the supercharger, my
> question are:
> 
> Is placing the bypass valve pretty much 3" from the S/C inlet ok (too
> close/ too far away) ?
> and is taking the vacuum signal to operate it from around 1" after the
> throttle plate ok (too close/ too far away) ?
> 
> Cheers
> 
> Dan

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