I am installing a full-race turbo kit on a JDM B18C swapped 1991 civic EF.
My question is this, There is a vacuum nipple on top of the throttle body, (originally hooked up to the charcoal canister) Can I use it as vacum source and hook the wastegate to this nipple?

Thanks guys

 

no it is venturi vac only.

 

No! The best source is from the comp housing on the turbo, but i run mine off the big nipple on my Skunk 2 mani and it works fine

 

I agree that the vac for the wastegate should be from a boost only source, meaning there is never vac present.

turbo compressor housings, hot side of the charge pipes are good places to tap a fitting in.