1. Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

PTU/ noise capacitor

Posted by Eclipse 1998, May 21, 2019

Please Support VR Speed Factory
Please Support ExtremePSI
  1. Eclipse 1998

    Eclipse 1998 Proven Member

    161
    10
    Joined Jul 21, 2010
    Northwest, Indiana
    In the process of relocating a few components.

    Based on the circuit diagram, I’m understanding that the PTU and noise capacitor need a chassis ground.

    I’m wondering if I could get away with not grounding the PTU?

    The noise cap will be ground to the lower left stud on the abs bracket.
     

    Attached Files:

    Street Build 1K  4

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  2. ThunderChild

    ThunderChild Supporting VIP

    2,259
    591
    Joined Jan 5, 2012
    Rathdrum, Idaho
    ..and you expect it to do it's job how if it's not grounded? That pair of transistors can't magically ground themselves.
     

    151  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 655  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 856  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  3. Eclipse 1998

    Eclipse 1998 Proven Member

    161
    10
    Joined Jul 21, 2010
    Northwest, Indiana
    On the terminal input, there is a ground terminal.

    At any rate, it’s grounded through the abs bracket correct?
     

    Street Build 1K  4

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  4. ThunderChild

    ThunderChild Supporting VIP

    2,259
    591
    Joined Jan 5, 2012
    Rathdrum, Idaho
    I see, are you talking about the mounting point being a ground? I've seen people have them dangling, but am not sure of I'll effects. Personally I'd have it body mounted as well as harness grounded as it may help prevent EM fields from affecting operation. Is there a major reason you can ground it after relocating?

    Perhaps @luv2rallye could weigh in.
     

    151  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 655  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 856  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  5. Eclipse 1998

    Eclipse 1998 Proven Member

    161
    10
    Joined Jul 21, 2010
    Northwest, Indiana
    Yes I was talking about if the mounting point is a suitable ground.

    It is grounded through the abs bracket.
     

    Street Build 1K  4

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  6. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,882
    1,487
    Joined Nov 14, 2013
    Independence, Kansas
    Mine is the one that is dangling.....but any point on the car to keep it from being bumped around will work. Mine just sits in the intake valley as I have relocated the coil. Check it from time to time to make sure it stays tight. I have a tach filter and it has to be grounded so it is bolted to the intake.
     

    247  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 343  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 3K  17

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM

    4K  24

    1990 Eagle Talon TSi AWD
    13.612 @ 107.760 · 1G DSM
    Loading...
  7. bling5tatus

    bling5tatus Proven Member

    1,289
    91
    Joined Sep 23, 2005
    DFW/Austin, Texas
    Mine's just dangling not grounded to anything and has been like that for a very long time. I have had issues where I thought the PTU was failing and dropping half of it's outputs before though. I'm not sure if that was the PTU failing or something else causing the problem.
     

    1K  0

    1989 Dodge Colt GT
    manual · 4G63t Swapped

    2K  1

    1991 Eagle Talon TSi
    fwd · manual · 1G DSM
    Loading...
  8. Eclipse 1998

    Eclipse 1998 Proven Member

    161
    10
    Joined Jul 21, 2010
    Northwest, Indiana
    Thanks for the input. I still have a couple things to button up but here’s a picture roughly what I came up with.
     

    Attached Files:

    Street Build 1K  4

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  9. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    3,882
    1,487
    Joined Nov 14, 2013
    Independence, Kansas
    Looks like a fine place to put the PTU. Secure, not bouncing around anywhere. I like your neatness!
     

    247  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 343  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 3K  17

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM

    4K  24

    1990 Eagle Talon TSi AWD
    13.612 @ 107.760 · 1G DSM
    Loading...
  10. brads

    brads DSM Wiseman

    798
    53
    Joined Oct 24, 2002
    Alta Loma, California
    the PTU should be mounted to something to serve as a heatsink. Looks like the bracket you made serves that purpose nicely
     

    Street Build 1K  0

    1995 Mitsubishi Eclipse GSX
    manual · 2G DSM
    Loading...
    ThunderChild likes this.
  11. Eclipse 1998

    Eclipse 1998 Proven Member

    161
    10
    Joined Jul 21, 2010
    Northwest, Indiana
    Thanks again for the information and reassurance. Planning to finish up the battery relocation sometime this week, time permitting of course.
     

    Street Build 1K  4

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...

Share This Page

Support Vendors who Support the DSM Community
Archer Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing RockAuto SouthBay Fuel Injectors STM Tuned VR Speed Factory WheelWell.com White Shed Speed