1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Turning the cats sideways?

Discussion in '80-Series Tech' started by alia176, Sep 6, 2003.

  1. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    I searched for some info on whether or not anyone turned their dual cats sideways to gain more clearance. Is there just not enough room under there?

    A.
     
  2. WolfpackTLC

    WolfpackTLC

    Messages:
    250
    Likes Received:
    0
    Joined:
    Aug 4, 2003
    Location:
    Central NC
    Although I haven't even looked yet, even if there was enough room, I'd speculate that the inevitable 90 degree or so bends required to turn them sideways (much less the 180 degree bends I'm envisioning) would put waaay too much exhaust gas resistance -read backpressure- on the system. Just a theory, but a technically gathered one.

    J
     
  3. Gumby

    Gumby Supamod Staff Member s-Moderator

    Messages:
    11,781
    Likes Received:
    310
    Joined:
    Dec 13, 2002
    Location:
    Knee deep in hookers and gin
    I'm thinking he might just mean rotating them around the pipe so they sit flat instead of on edge. I seem to remember looking at that as an option and deciding it couldn't be done because the down pipe is in the wrong place. It's further to one side than the other and would cause the cat to not fit. You could bend the down pipe, but that would be a PIA. Easier to fit new, smaller cats.
     
  4. landtank

    landtank SILVER Star

    Messages:
    18,425
    Likes Received:
    603
    Joined:
    Mar 27, 2003
    Location:
    Groveland MA
    Also in there present orientation they are less likely to flatten out if hit with something
     
  5. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    [quote author=landtank link=board=2;threadid=5026;start=msg38688#msg38688 date=1062946959]
    Also in there present orientation they are less likely to flatten out if hit with something
    [/quote]

    My thought on this is that it's more likely to get hit in the current orientation that being flat. Furthermore, it's easier to make skid plate for the cats in the flat orientation than the current configuration. Simply add an extension to the sliders and then support it on the frame rails. But, if there's no room to rotate the cats and re-weld them back on, then all of this is moot :-\ Maybe there's a little room to rotate the cats even 45 deg. That's still better than the current configuration. In any case, this won't affect exhaust flow or the efficience in any manner INMHO.
     
  6. Jon916996748

    Jon916996748

    Messages:
    144
    Likes Received:
    0
    Joined:
    Jun 10, 2003
    Location:
    Columbia, SC
    I have a 93' and Im pretty sure it only has one cat, if im not mistaking. But have any of you ever tried taking of one cat? You might have more felxibility with only one on.
     
  7. Rogue

    Rogue

    Messages:
    968
    Likes Received:
    1
    Joined:
    Mar 27, 2003
    Location:
    Jefferson
    Your '93 has two cats. The 95+ trucks have inline cats where the earlier 80s had side-by-side.
     
  8. Jon916996748

    Jon916996748

    Messages:
    144
    Likes Received:
    0
    Joined:
    Jun 10, 2003
    Location:
    Columbia, SC
    Hrm, didnt realize that, havent looked at my cats lately, or ever for that fact.
     
  9. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    It'd be easy to remove the forward cat since it's bolted on with flanges but I won't do it. That'll only piss off the OBD II and throw a CE light!
     
  10. Taz

    Taz

    Messages:
    342
    Likes Received:
    0
    Joined:
    Mar 27, 2003
    Location:
    San Juan Capistrano
    I had my cats turned sideways about 3 months ago. It was no problem and they are now up out of the way. I was worried about the heat build up in the floor on the passenger side but have had no problems yet. My local shop cut the down pipe just after the y and made a new one that just fits between the body and the body mount and then attaches to the cats. I will take some pics tomorrow.
     
  11. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    Taz,

    Thanks for the reply and send the pics to me at alia176atyahoo. Thanks. I'll have this done next week.

    A.
     
  12. landtank

    landtank SILVER Star

    Messages:
    18,425
    Likes Received:
    603
    Joined:
    Mar 27, 2003
    Location:
    Groveland MA
    TAZ,
    Do you have sliders on your truck? Slee and others use a brace at the break point of the two cats. I just checked Christo's site but that pic is gone. A concern I'd have is that by rotating the cats that middle flange would now be in the way of any slider I might put on.
     
  13. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    Rick,

    How much work would it be to eliminate the center flange and simply weld the two pipes together? Can this afford you more clearance?
     
  14. landtank

    landtank SILVER Star

    Messages:
    18,425
    Likes Received:
    603
    Joined:
    Mar 27, 2003
    Location:
    Groveland MA
    Alia I honestly don't know what would be entailed in doing that. But if you are considering a set of Slee sliders, from what I remember the brace runs between the 2 cats at the flange point. The brace is either flush or just below the bottom of the cats. So even if you rotated the cats and there wasn't an interference problem you wouldn't gain much clearence. I'd sooner spend the money of having a cat skid plate fabbed up that would attach to the slider at that brace. The Hanna sliders have such a plate but from what I've read they aren't for the newer LCs with the 2 inline cats and maybe no longer available either.
     
  15. cruiserdan

    cruiserdan SupportingVendor Emeritus Supporting Vendor Moderator

    Messages:
    20,567
    Likes Received:
    2,896
    Joined:
    Mar 27, 2003
    Location:
    Surrounded by Cruisers from all over the world
    As I understand it, Ken has made sliders for a 95-97. Once he makes something like that he usually keeps the jigs. I believe he is fabbing stuff in between doing other things. His website is back up. Christo wheels his stuff as hard or harder than anyone else and I don't think he's ripped a cat off yet while running his sliders.
     
  16. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    I'll prolly end up making up a set of sliders too when I get back home. I like the idea of having the cats tucked up high for simplicities sake I guess. We'll see what pans out. Thanks for the ideas/info.

    Ali
     
  17. Photo_Cruiser

    Photo_Cruiser

    Messages:
    266
    Likes Received:
    0
    Joined:
    Apr 9, 2003
    Location:
    San Rafael
    No offense to the DIY guys, but Check out what Christo and his buddies wheel, also check out Jim Brantley at http://www.realcruiser.com. He runs Hanna's sliders, who is for sure making sliders for 95-97 rigs...he just takes a bit to get them thus I got Slee's.

    You may gain 1/2 " dickin' with the cats but I have yet to hear of anyone ripping one out yet. Heck, I don't think even Junk has done that...I guess what's the point..unless it is a cash issue, there are tested products out there...save yourself the fustration and fitment issues and throw down the cash.

    This is just a personal opinion, 2 kids, job, no free time to sweat the small stuff....

    Now about that water bottle re-location, second battery tray, caster correction kit, heavy duty lower control arms and bushings, upgraded headlight wiring and bulbs siiting on my work bench...I gotta go!!
     
  18. alia176

    alia176

    Messages:
    9,639
    Likes Received:
    436
    Joined:
    Aug 21, 2003
    Location:
    Tijeras, NM
    [quote author=Photo_Cruiser link=board=2;threadid=5026;start=msg40048#msg40048 date=1063242639]
    ...I guess what's the point..
    [/quote]

    Because it's fun! :D
     
  19. Junk

    Junk

    Messages:
    6,185
    Likes Received:
    23
    Joined:
    Dec 13, 2002
    Location:
    buggerville nj
    You'd be better off just having some tube welded in there to act as a slider for the cats like what I have. Skid plate = heat build up. Bend some tube, mount it, should be done in a few hours. It's saved me THOUSANDS of dollars in what would have been destroyed felines. :flipoff2: