vacuum line issue

[lou schmouder]

I have a 2g with evo 3 manifold and have my bov, map sensor, boost gauge and mbc on same line. Is there another way???waste gate acting up and also boost gauge...

 

[Firsts tuner]

If there arent anymore nipples available you may have to drill and tap new holes for nipples. Teeing anything off of the bov line is a big no no from what I understand. Does your throttle body have any capped off nipples on it?

 

[Kapok6]

How many ports are on the Evo 3 manifolds? I have an RVR and I know they are basically the same but I thought there was one vacuum port difference between them.

BOV should have a dedicated line.

MAP sensor should definitely have a dedicated line.

MBC I would have tapped into a port pre throttlebody, such a turbo compressor housing, or somewhere in the intercooler piping.

Boost gauge I have "T'ed" into the FPR line.

 

[Ghost_92TSi]

How many ports are on the Evo 3 manifolds? I have an RVR and I know they are basically the same but I thought there was one vacuum port difference between them.

BOV should have a dedicated line.

MAP sensor should definitely have a dedicated line.

MBC I would have tapped into a port pre throttlebody, such a turbo compressor housing, or somewhere in the intercooler piping.

Boost gauge I have "T'ed" into the FPR line.

x2,

MBC I take the original line going to the wastegate, and put a new line from MBC to the wastegate.

 

[lou schmouder]

I have to line one for fpr and other line has all that stuff on it. It has a 1g throttle body on it with 4 nipples on top. Was told not god idea to tap into those .

 

[miloolim]

waste gate acting up and also boost gauge...

Acting up? Might be a boost leak.

 

[Total Eclipse]

Don't see why the T.B. nipples would be a bad source? I have used them before. They are on the intake side of the butterfly, and see the same pressure as the intake does.

 

[lou schmouder]

Boost tested great @ 44 psi with little leak down. Throttle body nipple have no vacuum I was told.

 

[Kapok6]

Some people utilize the P port on the t body but I have never utilized any of the t body ports.

 

[4G63_fiend]

I have gone off both vacuum port on throttle body and vacuum line for the fpr with no problems. just my 2 cents!

 

[lou schmouder]

Which 2 ports can I use that has vacuum and boost

 

[Black-Out]

I'd just pull the mani drill and tap how ever many ports will suffice and clean then reinstall it....It may be a pain to do it that way but you'd at least make sure that nothing got in your engine- That aside you never tap more than once on the vacuum sources for the fpr or map as you continue to tap the signal lines the vacuum signal reduces and ideally you don't tap those two lines or the waste gate at all....I like leaving them completely seperated from everything else......But that's just me.....

 

[Kapok6]

I am still trying to figure out how you don't have enough ports to fulfill your needs when I have the same IM and had no issues.

Can you get a total port count?

 

[boost97gst]

I run my boost gauge off the "p" tube on the TB. Im pretty sure its the one marked P. The other 2 can be capped or looped if you deleted emissions

edit: Kapok beat me to it. i missed that.

 

[007jimmy]

evo 3 has 4 ports and rvr has 3 so id assume you have an rvr intake not evo 3.. i also have an rvr but its not on my car yet. I just got it last week and im already grinding, welding and moving things around. i welded the 2 front plenum ports closed and now im smoothing the entire intake and drilling, taping 4 ports in the back for a cleaner look. brake booster, fpr, boost guage and map. the only line im leaving in the front is the one that goes to the pcv.

 

[snowborder714]

I'd do this.
http://www.dsmtuners.com/forums/152320673-post602.html

 

[007jimmy]

looks expensive... it would take alot of trips to the junkyards to fund that.

 

[lou schmouder]

Ok I have 2 on Evo 3 manifold fpr and one in front of injectors. All throttle body nipples are caped. What the difference of that vacuum box and hooking all my stuff to one vacuum line. Don't not want to drill and tap my manifold .

 

[snowborder714]

The difference is the amount of air being fed into the vacuum block is a lot greater than the little bit of air coming out of one vacuum line and being distributed to multiple sources. You can't be sure that each of those sources is getting all the possible air it needs if you're teeing one small vacuum line 3 or 4 times. But when feeding a vacuum block with a -10 AN line, you're making sure you pump as much air into it as possible so each item that feeds off it can grab all it needs to get the most accurate signal.

 

[007jimmy]

your still going to have to take your manifold off to weld the -10 bung in it and then mount the accumulator box. the other way is like i said and just add more ports. still have to take it off and drill/tap it but each line needs its own source.

 

[snowborder714]

I'm not arguing that it's a bit more work and more expensive. I was just answering Lou's questions on why a vacuum block is better than using a single vacuum line to feed his items.