Is this thing really needed and what does it do?

[Pwnm30rdi3]

Attached to the HVAC system, doesn't look like it does much.

 

[m j]

stores vacuum to run the HVAC controls
for a diesel engine vacuum operated anything doesnt make sense

 

[Pwnm30rdi3]

Seems like it doesn't do a whole lot. lmao
Even with the hydroboost conversion, is it still necessary? Literally the only thing my vacuum pump operates is the HVAC.

 

[pt_ranger_v8]

Seems like it doesn't do a whole lot. lmao
Even with the hydroboost conversion, is it still necessary? Literally the only thing my vacuum pump operates is the HVAC.

If you have an e-vacumn pump, you need some way to store vacumn. The reason it's there with a belt-run pulley is because they suck ( haha) at low rpm's.

You probably don't need it. Wouldn't hurt to leave it, either.