I have installed a single turbo on my FD, and the instructions only called for me to remove a handfull of hoses. I didn't even have to remove the intake manifold, yet I have read on the forum that many of you have removed almost all of the vacumm hoses. Which is correct?

 

I just did this 3 weeks ago. Get rid of all ove them and start fresh.

The only vac lines you should have are the BOV, FPR, boost controller and boost guage...

The vac lines going to the oil injectors you can just cap off. Yes, they will still work.
Thats everything!!!!

 

The car will work fine with or without them, for the most part. The turbo installation manual would be really long and complicated if they described all of the hoses you should and should not remove, so they just describe the minimum mods that you need to do to get the single turbo working. I left my hoses in place in case I need to switch back to the stock turbos, like every other year or something like that *cough* SMOG *cough*.

-Max