Announcement

Collapse
No announcement yet.

vacuum hose routing

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    vacuum hose routing

    what do you feel the best way to route vacuum hoses for MAP based standalone is?

    for example.

    i have three things in the dash that need a vac signal:
    megasquirt
    analog boost gauge
    electronic boost controller

    right now there is a T going between the gauge and MS, the EBC isnt installed yet. i do get a bit of map signal noise. mostly when i am in boost. i'm considering:

    a vacuum log, fed by one large hose, then split off to all three things.
    two hoses from the engine, one for the MS, one for the other two things
    -or- one hose for the gauge and one split between the MS and EBC

    Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
    ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
    Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

    #2
    anything you add to a vacuum signal will affect its response. This is why I suggest you run the MS alone off the manifold.

    Run the boost controller and gauge off the same line. Also why aren't you using the MS based boost controller?

    Comment


      #3
      because MS2 doesnt have a boost controller
      Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
      ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
      Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

      Comment


        #4
        MS2 extra does though

        Comment


          #5
          yes but i dont have that lol. and i didnt even know that existed when i bought my boost controller.
          Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
          ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
          Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

          Comment


            #6
            Originally posted by therieldeal View Post
            yes but i dont have that lol. and i didnt even know that existed when i bought my boost controller.
            The nice thing about MS boost controllers is that you can set boost based on RPM which I don't think any commercial controllers can do.

            Did you bump the boost already?

            Comment


              #7
              not yet... the 550's came in yesterday. i am hoping to install those and the boost controller this weekend.

              that is a nice feature... the greddy i have definately cannot do that. i may have to look into MS2e...
              Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
              ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
              Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

              Comment


                #8
                Originally posted by therieldeal View Post
                not yet... the 550's came in yesterday. i am hoping to install those and the boost controller this weekend.

                that is a nice feature... the greddy i have definately cannot do that. i may have to look into MS2e...
                that feature is well worth it - prevent some wheelspin and get some nice topend and the modification will cost you no more than $20-30 including the solenoid.

                Comment


                  #9
                  *completely changes thread topic*

                  so are you using MS boost control? what solenoid do you use?
                  Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                  ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                  Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                  Comment


                    #10
                    Originally posted by therieldeal View Post
                    *completely changes thread topic*

                    so are you using MS boost control? what solenoid do you use?
                    Nope, have not done the hw modifications yet although I have all the parts. The solenoid most people use is off the GM Typhoon (the turbo Jimmy).

                    Comment


                      #11
                      vacuum hose routing and length has an almost unmeasurable effect on MAP sensor response. Air has so little inertia that you can make the vacuum lines hundreds of feet long and it'll only delay the MAP signal a millisecond or two, which isn't enough to affect anything greatly.
                      Ask me about engine management!

                      Comment


                        #12
                        I am not worried so much about hose length, I am worried about devices attached to the same line that may have leaks.

                        Comment


                          #13
                          same thing applies there... if there's a leak anywhere in the system, it'll show up everywhere else.
                          Ask me about engine management!

                          Comment


                            #14
                            Originally posted by matt_fulghum View Post
                            same thing applies there... if there's a leak anywhere in the system, it'll show up everywhere else.
                            Haven't tested myself, but I am guessing transients do show up and may results in the amplification of erratic readings.

                            Comment


                              #15
                              transients? nah, a vacuum leak is generally pretty constant, unless the MAP rapidly changes (which seals up the leak generally for a split second).

                              What I was trying to get at is that if you have a vacuum leak ANYWHERE, nothing in this world is gonna stop it from screwing up your readings
                              Ask me about engine management!

                              Comment

                              Working...
                              X