What is this on the carburetor ?

Hi

I look my carbs and i see that (in red)

I think it's vaccum but where i do connect that ?

I know i need to put a vaccum hose between the boost sensor and the plenum (down of the plenum)

Another one between the fuel pressure regulator and the plenum (UP of the plenum)

But i don't know what is this hose



Thanks a lot

 

the nipple on carb 2 is the green line. This should go directly to the boost sensor.
Below is how I had mine set up with a boost controller.
I've since eliminated the boost gauge and the boost controller so there is a direct line from the carbs to the boost sensor.

 

Thanks a lot

The hose under the surge tank is drain hose ?

 

correct, but it has a valve which needs to be rebuilt.
It will drain any oil/fuel residue at atmospheric pressure but seals up when under boost.
XJ4ever sells the foam filter and gaskets for this.
I guarantee your filter will be disintegrated.

 

here is the replacement gasket and foam filter from XJ4ever

 

Thanks it's a foam, a papier gasket and one oring ?

 

Rammstein86380........I replied to your e-mail of a few days ago and it bounced back as a bad address. I've sent the same info to you via this website's Conversation service, so you should look at your Inbox to retrieve the information you were seeking.

 

Thanks

I clean the valve but how Can i test that to see if the valve is ok ? With comprimed air ?