BOV

[Frankenstien93]

for the bov do i need to hook it up to a vacuum line at all and if so to what one should i hook it up too.

[emperor_lunchbox]

you definately need a vacuum line. You could prolly use one of the 4 million line that come off of the intake manifold. I'm not too sure about which ones are best to use but I can't imagine that it matters too much. I hate to say this, but, I'm sure there is a bunch of information to be found from *gulp* searching.

[Chezedik]

It doesn't. As long as there isn't a check valve in it, and it hooks directly to the manifold, after the throttle body, it will work for the BOV or for a WG. But you can use any line for the WG. Just keep in mind, if it is on the hot side, it will run lower boost, than it will on the cold side, by whatever the pressure drop is across the IC.

[emperor_lunchbox]

where is the better place to install it?

[Chezedik]

The valve? It depends on what size turbo and BOV you are using. I am using a T3/T04b and a 1G DSM BOV, so I will be installing on the hot side. This will hurt throttle response a little but will further prevent surging. If you have a smaller turbo or a larger BOV, then you can put it on the cold side, which will provide better response, and keep surge down/non-existant.

[Frankenstien93]

so i could use one of the four that are right underneath the tb?

[240sHorTy]

Most people tee off the FPR vacuum line which is on the back side of the intake manifold. The ones in front are for the carbon cannister and EGR. I've heard that some see only vacuum and no boost, but I haven't tried them.

Or you can tap into the intake manifold behind the throttle body.

[KATwo40]

I wouldn't tee off the FPR signal. If you develop any leak in the system (the valve itself, the line to it, the tee fitting, etc.) the FPR signal will be corrupt and FP won't be correct.

[4felix20]

i've used the thickest/biggest hose (of the 3) coming off the carbon canister for my BOV before.

[Frankenstien93]

So if i go to T off the line going into the back of the TB for the BOV where is a good place to come in for my boost gauge right now i have it coming right off the comp housing T off to My wastegate

[lrb_2000]

for the boost signal, you want to tab into a line comming off your intake manifold, it will be most accurate.. because of the pressure drop of the intercooler, your gauge may acually be reading 1 or 2 psi higher than it acually is when connected to the compressor housing...

[emperor_lunchbox]

The valve? It depends on what size turbo and BOV you are using. I am using a T3/T04b and a 1G DSM BOV.

I am looking for a t3/to4e 50 trim with dual .48 a/r's with a HKS SSQV or a T3 super 60 (undecided on a/r's)

So would the cold side work?Also, I was thinking of getting one of those JGS tools vaccuum boxes and running the BOV, WG and Boost gauge, does this hurt the signal going to any of these devices?Thanks.

[lrb_2000]

you'd be safe on the cold side.. the bigger the turbo, the bigger BOV you'll need, depending on the amount of boost you're running... big turbo + small bov = compressor surge... a SSQV would be more than enough for a super 60 or 50trim t3/t4.. I doubt you'd have any problems on the cold side...

As far as the signal using one of those blocks, I doubt it would hurt it.. unless you have leak somewhere along those lines, you would be fine... I'm going to do the same thing.. although, I think i'm going to run the wastegate signal off the compressor housing.

[emperor_lunchbox]

Does the compressor housing offer a more accurate reading than the other lines?

[lrb_2000]

well the wastegate opens when you go into boost.. so the closer to the wastegate you put the source, the faster it will open, and less chance of getting a boost leak.. and the compressor housing is the first place boost would be existent...

or maybe I have it backwards.. haha, maybe the manifold would be the best place, because as soon as it saw, say 8psi, the wastegate would open..

I can't think.. it's 6:30am and I haven't went to bed yet.

[emperor_lunchbox]

what is the time delay between the manifold and the compressor housing?I can't imagine the benefit of using one source over the other being anything but marginal at best.I was just wondering if the compressor housing would give you a more accurate reading. I guess since I will be getting a vaccuum block and I am not sure if I can plug up the one of the outlets I will just use the FPR line and run everything off of that. What size hoses need to ne run from the block?Also, what type of hose is recommended?

[lrb_2000]

I don't think it's the delay, it's the pressure drop of the intercooler you have.. you could have say 10psi on the hot side, but 9psi on the cold side... so you might see less boost, but it's safer, because the wastegate will open sooner.

JGS tools sells plugs for the vacuum block @ $1 a piece..

[emperor_lunchbox]

I see. That makes more sense. So cold side it is.Thanks.