1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Varg In Jeep's Clothing

Discussion in 'Builds and Fabricators Forum' started by ITLKSEZ, Aug 20, 2015.

  1. Sep 25, 2019
    Jw60

    Jw60 Recovering Jeepaholic

    Sedalia MO.
    Joined:
    Oct 5, 2018
    Messages:
    335
    I had a group 37 or whatever (60lb agm) under the passenger seat when I needed exhaust done on the CJ5. I guess the positive post found a spring when the guy went to move it in for the night. They saved the seat but kindly asked me to fix the battery and wires before he could work on it.
    That makes a hand crank or blank shot gun shell sound a lot safer than this new fangled electric stuff.
    But I do have a lot more respect for batteries now.
     
  2. Sep 25, 2019
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
    Joined:
    Oct 25, 2006
    Messages:
    4,629
    Batteries make hydrogen gas when over charging. My uncle had the same thing happen. Battery exploded when he was charging it on a big old truck on the farm.
     
  3. Sep 25, 2019
    Rich M.

    Rich M. Shoe pusher

    Maryland
    Joined:
    Mar 23, 2008
    Messages:
    604
    In a pinch, most beer is neutral pH and makes for good impromptu eye wash. Btdt, ER complimented us on quick thinking. We were blitzed and Bud tall boys were all we had......
     
  4. Sep 26, 2019
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
    Joined:
    Oct 25, 2006
    Messages:
    4,629
    I hear urine is as well.....
     
    Rich M. likes this.
  5. Sep 26, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,488
    While I’m waiting for the fuel pump situation to work out, I’m starting to think about the muffler. I have very specific spots where the inlet and outlets need to be, so I really have no choice but to build one from scratch.

    The old muffler I have from a Volvo 850 is close to what I need, but not close enough. It’s square, flat, and really quiet. I decided to cut it open to see what’s inside; to see if it’s a design I want to replicate.

    [​IMG]

    It was packed with fiberglass that has disintegrated over the years.

    [​IMG]

    Inside the fiberglass is an “S” of perforated tubing. This is referred to as an “absorptive” muffler, one that uses packing material to absorb sound.

    [​IMG]

    I think I will copy the direction of the flow, but utilize a “reactive” design instead. This design (e.g., Flowmaster) uses baffles to cancel the sound waves out, like noise cancelling headphones. It has no packing to degrade, and has good flow if designed right. The key is to figure out (or get lucky, like I'm hoping) how to design the chambers to cause destructive interference...

    [​IMG]

    ...rather than constructive interference, making it louder, or "raspy." That clapping noise you hear in some exhausts is the sound impulses piling on top of each other. I don't want that.

    [​IMG]

    If I use the "S" shaped path, I can essentially make three mufflers inside the box, each with different angles to cancel different frequencies.
     
    Walt Couch, fhoehle, Focker and 4 others like this.
  6. Sep 26, 2019
    Dphillip

    Dphillip Sponsor Sponsor

    Omaha NE
    Joined:
    Nov 25, 2008
    Messages:
    224
    It’s now official, you are totally out of control!
    I think an intervention is now in order.
     
    Twin2 and Focker like this.
  7. Sep 26, 2019
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
    Joined:
    Oct 25, 2006
    Messages:
    4,629
    I had the same idea, but abandoned it when I found a set of discarded stainless mustang mufflers in the trash... Haha no, just kidding. I never thought about building my own muffler. Get to it!
     
    fhoehle, Focker and ITLKSEZ like this.
  8. Sep 26, 2019
    Cap-n-Cray

    Cap-n-Cray I want to do this again.. Staff Member Sponsor

    Bainbridge...
    Joined:
    Sep 21, 2009
    Messages:
    202,754
    Two words... Open pipes...
     
  9. Sep 26, 2019
    SoCalNickG

    SoCalNickG Member

    Los Angeles, CA.
    Joined:
    Mar 17, 2017
    Messages:
    81
    Please hold off on the intervention until he is finished with the jeep!:sneak:
     
    Dphillip and tomasinator like this.
  10. Sep 26, 2019
    '74Renegade

    '74Renegade Active Member Sponsor 2019 Sponsor

    Fair Oaks, CA
    Joined:
    Sep 1, 2005
    Messages:
    1,096
    I don't think "flomaster" and "noise cancelling" belong in the same sentence.
     
    fhoehle and ITLKSEZ like this.
  11. Sep 26, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,488
    Flowmaster is more relatable than “stock Honda Civic,” but same concept... :D
     
    '74Renegade likes this.
  12. Sep 26, 2019
    73 cj5

    73 cj5 Not ready for the junkyard yet Sponsor

    MS
    Joined:
    Jan 10, 2014
    Messages:
    1,057
    I like your style. Daily driver it’d be miserable but off road toy,,, doable.
     
  13. Sep 27, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,488
  14. Sep 27, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    2,436
    was that a double fist pump?
     
  15. Sep 27, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,488
    It was a, “It’d better have worked, or Hulk smash!”
     
  16. Sep 27, 2019
    47v6

    47v6 junk wrecker! Sponsor

    Washington DC.
    Joined:
    Oct 25, 2006
    Messages:
    4,629
    Now, wait... where's that ignition switch to turn it off.. Oh yeah..

    Killer man!!!!
     
    ITLKSEZ likes this.
  17. Sep 27, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,488
    The back-story, now that I have a minute...

    I got the new fuel pump, and it didn’t help the situation. I started digging into the fuel rail, and I found that three of the four injectors were good, but one was stuck shut from sitting. I threw it in a jar of mineral spirits and shook it, then it started to click lightly when I’d hit it with 12v. I kept working it, and it freed itself. Great, but unrelated.

    This system works by applying a constant 12v to the injectors, then the fuel ECU supplies a ground pulse.

    Fuel pressure was good, the injectors worked, there was a constant 12v, but there was no ground pulse. It took all day with the wiring schematics to figure out there was a single ground wire up by the right front turn signal that I hadn’t hooked up. It feeds ground to the ‘radio suppression relay’ near it. Technically, the pumps shouldn’t have worked either, since that feeds the power to them too, but whatever.

    I’m glad this happened; I learned a lot about how this system works. There’s no better way to learn something that to just dive right in. Do it!!!
     
    Fly Navy, homersdog, Dphillip and 2 others like this.
  18. Sep 27, 2019
    ITLKSEZ

    ITLKSEZ Volvophilic

    Post Falls, ID
    Joined:
    Aug 13, 2015
    Messages:
    3,488
    I’m extra happy that this worked because the engine is from an ‘87 automatic 740, the transmission is from an ‘82(?) 240, the distributor, clutch and flywheel was from a turbo 940... I wasn’t sure if everything was going to play nice. So far so good.
     
    Twin2 likes this.
  19. Sep 27, 2019
    mortten

    mortten I can’t put my finger on it

    Peninsula, Ohio
    Joined:
    Apr 17, 2006
    Messages:
    1,245
    Almost everything is ground switched anymore. Sounds good. I don’t think you even need a muffler :)
     
  20. Sep 27, 2019
    Twin2

    Twin2 wasn't me Sponsor 2019 Sponsor

    Virginia Beach, VA
    Joined:
    Apr 28, 2011
    Messages:
    3,878
    The ear muffs was a nice touch :D
    sort of reminds me when I first fired up jeep after body off for a few years :whistle:
    dawg had hung out with me in garage for months , while I worked
    only time I would kick her out was when I needed to do some welding
    when I was doing the wiring under dash she would jump into jeep . and pounce on my stomach . to get my attention
    all was well till the day came . to see if it would run . open headers
    her interest about hanging out in garage . is long gone . all I have to do is act like I am going to start jeep or motorcycle
    no more dawg . she hides out by trash cans at other side of yard
     

Share This Page

New Posts