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New life to an old truck Cat. converter

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Kyle89K5, Oct 16, 2001.

  1. Kyle89K5

    Kyle89K5 1/2 ton status

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    Was a little curious about my trucks performance here lately so I decided to cut the converter off. When we got it pulled out, the thing weighed better than 100#!!!! Put in a peice of 3" pipe in its place and GOOD LORD the difference is INCREDIBLE!!!!! I thought I was gonna HAVE to go up to 4.56's just to be able to drive my truck, now I'm DAMNED happy with my 4.10's. Not to mention 3" with 40 series flows sound killer.

    Just thought I'd share. [​IMG]

    Kyle
    89K5
     
  2. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    Yep always does the trick....just remember come inspection time...either you know someone or you dont so get ready to cough up some money for a new highflow cat or reconfirm a friendship
    I cut mine but I may go ahead and put a highflow cat back on for inspection purposes and to increase backpressure

    What? You think the hole is too deep? Lemme see...
    1985 GMC C-10 Shortbed
    1984 Chevy K-5 Blazer
     
  3. mudhog

    mudhog THEGAME Staff Member Super Moderator

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  4. Kyle89K5

    Kyle89K5 1/2 ton status

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    Our state did away with inspections this year. I'm in good shape

    Kyle
    89K5
     
  5. Kyle89K5

    Kyle89K5 1/2 ton status

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    Plugged BAD!!! No light shining through at ALL. We tried to beat a peice of rebar through it my it was no go. Solid as a rock

    Kyle
    89K5
     
  6. DuneRunner

    DuneRunner 1/2 ton status

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    Also try a new O2 sensor.

    DANGIT it's not a bronco!
     
  7. Kyle89K5

    Kyle89K5 1/2 ton status

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    It's on my list. My truck sat for about a year so its do for a full tuneup. Still running pretty dang good though

    Kyle
    89K5
     
  8. BurbinOR

    BurbinOR 3/4 ton status

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    Cheap Catco converters are around $50 if you ever need to put one in.

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>
     
  9. Kyle89K5

    Kyle89K5 1/2 ton status

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    What size are those? I've heard of the elusive 3" in/out catco, but never seen a price

    Kyle
    89K5
     
  10. Depdog

    Depdog 1/2 ton status Author

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    Take the old one and chip/beat/drill out all the crud inside and then put a pice of 3" pipe through it. Camoed , nobody would know you did not have it.

    Hmm, think I have ever done that before!

    Depdog


    <font color=blue>Weenie K5, little mods' Small Tires!</font color=blue>

    <a target="_blank" href=http://depdogsk5.coloradok5.com>depdogsk5.coloradok5.com</a>
     
  11. nofeartruckin00

    nofeartruckin00 1/2 ton status

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    Won't you lose acceleration/powe by taking the cat out? Or does leaving the muffler there make up for the loss in backpressure?

    Mud, the ultimate paint job
     
  12. Kyle89K5

    Kyle89K5 1/2 ton status

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    I was tired of messin with it last night so I just left it be. Don't sound like a bad idea. I doubt that our state will keep the laww the same with no inspections for long, but you never know.

    BTW, turn on your ICQ slick

    Kyle
    89K5
     
  13. Kyle89K5

    Kyle89K5 1/2 ton status

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    Prb. But mine was clogged so bad that it was going the other way. I've got more power now, but that's not to say that I would gain some back by putting a new cat in. For now, I'm gonna run it as is. I planned on the catco, but just can't find the damn thing.

    Kyle
    89K5
     
  14. CrazeeBush

    CrazeeBush 1/2 ton status

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    summitracing.com [​IMG]

    -BuSH
    '83 K5 Blazer
    '98 Monte Carlo z34
     
  15. Kyle89K5

    Kyle89K5 1/2 ton status

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    Never founda 3" model on their site. That and their site is HELL to navigate

    Kyle
    89K5
     
  16. CrazeeBush

    CrazeeBush 1/2 ton status

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    Online Catalog-Exhaust-Catalytic Converters-Catco Universal Catalytic COnverters.. [​IMG] anyway, the PN is CTO-6007, it's a 14" long, 3" in/out catalytic converter. Price is $50.99

    -BuSH
    '83 K5 Blazer
    '98 Monte Carlo z34
     
  17. Kyle89K5

    Kyle89K5 1/2 ton status

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    you're more patient than I am, I never did find that. Thanks.

    Kyle
    89K5
     
  18. jcg

    jcg 1/2 ton status

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    Mine was the same way. I was getting around 7 mpg and it ran like sh!t so i took a sawzall to it, right before the cat. I just put on a reducer to 2.5" pipe and a stock replacement muffler, welded up the bends over the axle, and bolted it all in. I couldn't believe the difference it made! It instantly doubled my gas mileage and had a LOT more power than before. My cat was toasted pretty bad and the muffler was rotted out. However, my new dual setup with ceramic coated headers and 50 series Flows is even better!! The H-pipe was hell though! Had to order some 2" diameter, 2" radius J-bends and weld up an H-pipe that snakes between the T-case and my skidplate. A lot of work but it was worth it!!

    Joe
    RIT Mini-Baja www.rit.edu/~bajawww
    Team Mudnuts www.mudnuts.org
     
  19. ftn96

    ftn96 1/2 ton status

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    JCG, you got some pics of that H-pipe snaking through the t-case and skid plate? Would like to see how it looks and clears everything.

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  20. jcg

    jcg 1/2 ton status

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    I don't have a digital camera yet but I'm probably gonna get one next month so I'll put up some pics then. It runs right behind the crossmember, between it and the T-case. Pretty soon I'm gonna put a heat shield around the pipe since it's REAL close to my t-case, just to be on the safe side.

    Joe
    RIT Mini-Baja www.rit.edu/~bajawww
    Team Mudnuts www.mudnuts.org
     

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