Hard vacuum lines and welded ic pipes

[pest007]

Hey, here's the deal. I'm sick of having boost leak issues cause they are annoying. And for the most part pretty easy to track down!

My question is, would it be possible to replace all the vacuum hoses with some stainless ones or even the copper lines they sell?

As for the ic pipes. The only possible problem I foresee would be removing the pipes after they are installed but there are ways around that!

Has anyone's done the hard vacuum line thing? I've seen nitrous setups that have hard lines into the IM but I know that's a little different!

 

[91stocker]

Delete your emissions and you shouldnt have much for vacuum lines then.

If you have a short route ic you could weld them and remove a few possible boost leaks. Ive never seen any other welded piping other then the short route so i cant say for those, but the short route is still pretty easy to remove/install after being welded.

 

[agentorange313]

I am not sure of the emmisions laws in Canada, but in NJ we can get around most of our emission systems.

You need at least 3-4 vacuum lines running form you intake manifold:

-Fuel pressure regulator
-Blow off valve/ bypass valve
-PVC(depending on your set up)
-Boost Source (map sensor, boost gauge)

As far as a boost source, I say tap the j-pipe or outlet of the turbo, and run it to the wastegate, I would not "T" any of the lines.

You can remove the stock vacuum lines and go with hard ones. What you need is to decide what type of lines you are using. Nitrous lines are usuall 3AN lines, so you could use those since they have a flare end which creates a seal. You can also use Pneumatic fittings, they are supposed to be leak proof: https://www.extremepsi.com/store/home.php?cat=1016

Both methods require you to find out what thread size many of the vacuum fittings are. For example, out manifold use 1/16 and 1/8 BPST fittings. So you would need a BSPT fittting to 3AN (if you were to use nitrous/brake hard line)

To make you life easier you can retap each of the threads with SAE NPT thread pitches to allows of easy installation of the fittings.

Depending of what BOV and wastgate you have, hard lines may or may not be an option. With TiAl brand products, a Metric fitting of 10mm 1.0 us used for most vacuum lines.

Overall you will need lines, fittings to go along and maybe a tap set. Some will been to be metric while others BSPT or NPT. Also get some thread sealant.

goodlcuk

 

[pest007]

All my emissions are just a distant memory! This sounds like a good deal of work but might be worth it! Thanks for the help guys

 

[Rideit636]

Yeah. I know someone that uses those "push-lock" style lines and nylon hoses on every car he builds and swears by them.