Close

Results 1 to 6 of 6
  1. #1
    Join Date
    Feb 2013
    Location
    Maryland
    Posts
    1,691
    Rep Points
    2,935.0
    Mentioned
    96 Post(s)
    Rep Power
    30


    Yes Reputation No

    Fuel-It STG3 Hobbs Switch Question (mounting location)

    Hey guys,

    This is a dumb question; more just curious regarding best practice. I have the hobbs switch for the secondary lpfp pump; previously I had been using the JB to trigger it and then borrowed a friends chargepipe with 'normal' taps for meth bungs.

    However - my actual chargepipe is tapped for an aquamist bung; the ID is smaller than that of the Hobbs switch.

    Anyone mounted the switch elsewhere? I was thinking about just adding in another T to the boost reference coming off the manifold...But since it's already T'd once (BOV and AEM Boost Gauge), would that be over doing it? I haven't drilled out the manifold for an NPT fitting so it's the stock diameter.

    Alternatively, I could drill tap the charge pipe to fit the larger thread size of the hobbs switch.

    Thoughts? Preferences? Just need to find a good boost reference.
    [I]E88 N54 w stuff
    MB w205 c450

  2. #2
    Join Date
    Nov 2012
    Posts
    2,490
    Rep Points
    1,935.0
    Mentioned
    199 Post(s)
    Rep Power
    0


    2 out of 2 members liked this post. Yes Reputation No
    I did something cool with mine. I removed the T from the brake booster line that sent vacuum to the trunk for the exhaust flap solenoid. I T'd into a boost line and sent that to the line going to the trunk.

    I then tapped one of the wires for the exhaust flap solenoid to use as the 12V keyed power for the Hobbs. I forget which wire, but one is 12V constant when Ign is on, the other is the "trigger" for the solenoid. This kept everything in the trunk for me, using already ran lines and hose from the engine bay.

    Soon this will be moot and a Hobbs will not even be needed, as with 1 line of custom logic we can repurpose the exhaust flap to serve as a 12V trigger itself Click here to enlarge *no ETA on this yet though*

  3. #3
    Join Date
    Feb 2013
    Location
    Maryland
    Posts
    1,691
    Rep Points
    2,935.0
    Mentioned
    96 Post(s)
    Rep Power
    30



    Yes Reputation No
    Click here to enlarge Originally Posted by jyamona@motiv Click here to enlarge
    I did something cool with mine. I removed the T from the brake booster line that sent vacuum to the trunk for the exhaust flap solenoid. I T'd into a boost line and sent that to the line going to the trunk.

    I then tapped one of the wires for the exhaust flap solenoid to use as the 12V keyed power for the Hobbs. I forget which wire, but one is 12V constant when Ign is on, the other is the "trigger" for the solenoid. This kept everything in the trunk for me, using already ran lines and hose from the engine bay.

    Soon this will be moot and a Hobbs will not even be needed, as with 1 line of custom logic we can repurpose the exhaust flap to serve as a 12V trigger itself Click here to enlarge *no ETA on this yet though*
    Waiting with baited breath Click here to enlarge

    That's a cool way to do it, for sure. Candidly, not sure if I have the energy to do all that routing.

    I may just pull the charge pipe and tap it with the proper size hole. The cylindrical shape of it seems like a bit of a PITA to drill tap.
    [I]E88 N54 w stuff
    MB w205 c450

  4. #4
    Join Date
    Nov 2012
    Posts
    2,490
    Rep Points
    1,935.0
    Mentioned
    199 Post(s)
    Rep Power
    0


    Yes Reputation No
    Click here to enlarge Originally Posted by 135pats Click here to enlarge
    Waiting with baited breath Click here to enlarge

    That's a cool way to do it, for sure. Candidly, not sure if I have the energy to do all that routing.

    I may just pull the charge pipe and tap it with the proper size hole. The cylindrical shape of it seems like a bit of a PITA to drill tap.
    No routing necessary, all the lines are already there. Just move your Hobbs to the trunk. There is already a vacuum line ran to the solenoid behind the drivers side carpet in the trunk, and the power lines. The vac line that runs from the engine bay to there is just current supplied with Vacuum from the brake booster T. Take this T out, T into a boost line off your intake manifold, and it's a 1" length of hose to connect it to where it used to T into the brake booster line. All done in engine bay, in probably 3-5 minutes.

  5. #5
    Join Date
    Feb 2013
    Location
    Maryland
    Posts
    1,691
    Rep Points
    2,935.0
    Mentioned
    96 Post(s)
    Rep Power
    30



    Yes Reputation No
    Click here to enlarge Originally Posted by jyamona@motiv Click here to enlarge
    No routing necessary, all the lines are already there. Just move your Hobbs to the trunk. There is already a vacuum line ran to the solenoid behind the drivers side carpet in the trunk, and the power lines. The vac line that runs from the engine bay to there is just current supplied with Vacuum from the brake booster T. Take this T out, T into a boost line off your intake manifold, and it's a 1" length of hose to connect it to where it used to T into the brake booster line. All done in engine bay, in probably 3-5 minutes.
    I'll check this out over the weekend! Thanks dude. The description is throwing me off a bit (no fault of your own at all) but i'll investigate. I may PM you if I have further dumb questions if that's OK.
    [I]E88 N54 w stuff
    MB w205 c450

  6. #6
    Join Date
    Jan 2013
    Location
    Savannah GA
    Posts
    1,332
    Rep Points
    2,605.0
    Mentioned
    108 Post(s)
    Rep Power
    0


    Yes Reputation No
    Click here to enlarge Originally Posted by jyamona@motiv Click here to enlarge
    Soon this will be moot and a Hobbs will not even be needed, as with 1 line of custom logic we can repurpose the exhaust flap to serve as a 12V trigger itself Click here to enlarge *no ETA on this yet though*
    Yessir! i believe this was one of my few decent ideas. I just need to figure out how to trigger a third pump......

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •