PhatBoy5015

I have been reading up on a bunch of turbo stuff because I am planning on doing a turbo b18 in my 97 Civic HX. I have noticed that just about everything to do with a turbo is controlled by vacuum. I was wondering if all vacuum sources are the same, because it seems like people are hooking various valves, gauges, etc. to random vacuum lines and it work fine. So just wondering if all the vacuum lines have the same amount of vacuum and boost?

Archidictus

In a perfect system, vacuum would be perfectly consistant across all gaps. In your engine, however, different diameters of hose and minute leaks in the system make certain places better candidates for tapping than others. Intake manifolds and brake booster lines - as they are both largest in diameter as far as feed lines - are the most popular choices. If you're wanting to do it right and cleanly, get a Golden Eagle vacuum distribution block and tap it into your intake manifold.

T lines off of that

adseguy

To add on to that the intake maifold will provide readings of vacuum AND boost good for boost gauges and BOV's. You can also T of the IC pipes or some turbos have nipples on th compressor housing itself to provide a BOOSt only signal to work say...the wastegate, but IMO I think it's better to run everything off the Intake manifold

Adr!an

There are actually 3 types of engine vaccum, Manifold, Ported and Venturi. So it depends on which vaccum nipple you attach the hoses to for the different devices and whet so ever.... The useful one is the Manifold vaccum and then the Ported as the Venturi vaccum port is after the throttle body...

tech1145

adrian, ported vacuum is ahead of the throttle blade and manifold is after right? If so what is the difference and why is manifold ideal for vacuum operated components?