Chris, Having the brake vac take off makes no difference to which runner is used on a manifold. Most factory road cars have the vac point on one runner, no matter whether it's EFI as vacuum is only supplied to the booster when the brake is on and typically throttle off. When the brake is off and there's no demand for vac the one way valve seals the vac off so the fuel system doesn't see anything different. That's typical of road cars and not always the case with racing vehicles or those used for aggressive driving etc which is why some ppl prefer non-boosted brakes for these ventures. I quite often lightly left foot brake (even with a manual) to balance a vehicle through quick roundies and although both mine are boosted it doesn't upset Webers or EFI to any noticeable extent.
regards Terry -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chris Williams Sent: Tuesday, 11 June 2002 10:57 PM To: [EMAIL PROTECTED] Subject: Re: Brake Booster Vacuum with twin webers? but wouldn't that upset the weber tuning having it in just one runner? > I was and will be using my twin webers and its allways had a > booster,It's just tapped into the #4 runner on the inlet mani. > Its much the same with the factory SU's. > > You dont need power when the brakes are on.. > Malcolm > Chris Williams wrote: > >> Hi, >> >> I was wondering how peoples set up there brake booster vacuum with >> twins? I thought one could make a rail out of some say 1" or 1.5" tube >> then tap a hole in each manifold runner so all four connected to the >> rail then connect the vac hose to a fitting on the end of rail. >> >> Kinda like a efi fuel rail setup? >> >> That way you would get more vacuum and the rail could act as a small >> vacuum reservoir. >> >> Thoughts?? >> >> Is this a good idea? >> >> I this the way every one does it? >> >> Regards >> >> Chris Williams >> >> >> >> >> >> >> > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
