I have a Weber DCO50SP that I'm looking to set up for a blow-through project. I need a good starting point regarding jet and emultion tube sizing. I'm pretty much starting from scratch here, so any solid advise is appreciated.

Set up consists of:
DCO50
RB upper mani.
S5 turbo lower mani.
Turbonetics 62-1
Tubular mani. w/ 40mm WG
MBC



Thanks,

 

No one can help? I tried Robert@Rotary Shack a while ago, but he never got back to me.

 

TWo suggestions-- first go to samba.com (the vw buss web site) and search the forum, and the other is CB performance they have two books that are sort of self serving as they sell dellorto blow through kits for vws, and blow their own horn a bit much. The gist of it is, first good gaskets to seal the carb, spring loaded o-rings on the shafts to seal them, and a restricter ring either under or instead of the normal stacks to richen up at high volume. their dell book or the turbo mania book explain which emulsion tubes to use and why. since cb uses dellortos they do not address the webers much. and there is google-- just search boost prepping a weber and you will find a lot of info, a lot of it from our friends across the pond and some of it far ahead of this 3rd world country. And the last but most important thing is; get a wide-band and use it from the get go, start your tuning at low power/no boost levels and work up. tuning a weber will give you a great love for fuel injection. You will also need a boost referencing fuel pressure regulator (cb recomends a rising rate regulator that seems to me to be over pressuring and sinking the floats to get the mixture rich enough at higher boost. I have a vw with a blow through and a dellorto 45, it has the rings and the progressive rate regulator. right now it is running without the turbo, trying to sort out fuel and tuning na before putting the turbo back on.