Will longer vac lines cause loss in Vacuum?

[KeithGTP03]

So I wanted to move my Vac line, from my TB to my EVAP purge valve, off of my supercharger. It required me to put a longer line on. The new line is probably 4-5 inches longer. Would this cause my vacuum to go from around 16 inHg to around 13.6 inHg?
This is the hose before:



This is after:

[matt5112]

no.

but a leak would

stock cam should net you 20-21 in Hg.

[KeithGTP03]

Is that at a cold start up and idle? With it warmed up, it used to be around 18inhg and now warm its 16inhg. The only thing I changed was the vac line. And its been hotter outside since the change...(not sure if that'd have anything to do with it)

[Fivefingerdeathpunch]

depends, when the car is HIGH idle the hg will be lower.

mines at like -17.9 ish, then once warm its -20.1

but now that its warmer, it dont go into high idle much anymore

[KeithGTP03]

Hmmm..so with the temp increase outside my vac should be higher. You said with a stock cam, Matt....what if it's not stock?

[matt5112]

depends on the cam.

what cam are you running?

[KeithGTP03]

I dont know...and I dont know how to find out without takin it out.