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what a productive afternoon! *turning into exhaust tech*

Discussion in 'The Lounge' started by Avery4jc, Mar 11, 2007.

  1. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    Took my mom's truck and had it washed and cleaned out really good

    took off my dad's old tailgate on his '75 Furd
    primed a new tailgate we got off of a parts truck
    put on the new tailgate (that actually has a functional handle now :))
    painted the inside of the tailgate black to match the black bed

    completely cleaned out the bed (had a TON of stuff in it)
    pressure washed the entire truck
    cleaned and began painting his drivetrain...axles, d-shaft, frame, etc.

    Went and bought some 6x9 Alpine Type R's to go in his doors
    Got the new Alpines put in....they sound great btw
    replaced windshield wipers :)

    Cleaned his K&N filter and pre-filter
    Turned up the idle a wee bit on his carb
    topped off all fuilds (MC has a tiny tiny leak somewhere)

    Oh and I sealed up both of my boxes for the 12's behind my seat...it sounds soooo much better now....I played w/ some porting but couldn't get it to the freq.'s where they were happy...so its all sealed back up now :)

    So what did everyone else do this fine sunday afternoon?

    Almost forgot...I didn't do this b/c I have heard rumors that it can cause issues so I figured I'd ask first.
    I want to cut off my flowmaster until I get a new exhaust put in...yeah yeah I know...not legal...w/e...if you're response is going to be telling me not to do it b/c it isn't legal I don't want to hear it b/c I already know the consequences...but my question is other than possibly damaging the Cat is there anything else that can be damaged by doing this?
    Right now it's:
    factory manifolds ---> 2 to 1 ---> straight pipe ---> Cat ---> straight pipe ---> flowmaster ---> straight pipe/turndown....

    So if I cut it off right before the flowmaster...still leaving about 18" of straight pipe after the Cat...Thanks!
     
    Last edited: Mar 11, 2007
  2. BoondocK5

    BoondocK5 1 ton status Author

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    your still gonna get too much O2 to the cat and its gonna either plug or burn out I'd lean toward the latter.
     
  3. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    ok...figured something along those lines...
    so literally plugged or just not working like it should?

    I don't have to pass smog for another year and couple months and I'll have a new exhaust on it by then (including new cats)...so if its only damage to the cat I'm ok with that but if its going to plug that wouldn't be good....
     
  4. BoondocK5

    BoondocK5 1 ton status Author

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    all that exhaust with all the excess oxygen spells super hot cat, either litterally plugged or litterally burned out.
     
  5. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    hmmmm so that could cause other damage...

    I'm just in the mood for a louder exhaust and don't have funds for smog legal headers, etc. right now...I know glasspacks are cheap and loud but most people I talk to say it isn't always a "good" loud....if you know what I mean.
     
  6. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    Flowmaster One Chamber:D
     
  7. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    Yeah I've heard the single chamber flowmasters are super loud...
    Maybe I should sell mine and buy one of those...
     
  8. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    They are real loud:haha: :haha: :haha:
     
  9. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    So do they make all of their different series mufflers (40's 50's etc.) in multi chamber and single chamber? I don't believe I've ever actually seen a single chamber for sale...only heard of them.
    Maybe they are a special order sort of deal. Not really something most shops would keep on the shelve.

    I actually don't have any problems w/ my factory manifolds...I've heard leaking/cracking stories (not to mention BIG $$$ to be smog legal) in regards to headers....if I just slapped a single chamber in place of my multi chamber flowmaster would it make that big of a difference or do I need to get more flow before it would take effect?

    I was thinking of ordering two high flow cats, two mufflers then taking the truck down to a shop and having them run new pipe from the manifolds back. It's actually quite reasonable from what I've heard.
     
  10. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    Ok so aparently the single chambers are called the "10 series" and are under their racing section...

    http://www.flowmastermufflers.com/10_race.html

    they have them in a 4" case and a 5" case and a straight through design or a staggered in/out design...anyone know pros/cons between them?
     
  11. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    They're stupid loud and they're in the race section for a reason. ;)
     
  12. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    *bursts bubble* :(

    Loud as in pulled over all the time loud? Or just noticably louder than the standard 3 chamber 40 series that everyone around here seems to have?

    I just saw Summit has them for like $75...:)
     
  13. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Just buy the Imco knockoff of the 40 series. You won't be disappointed.

    I liked the tone when I heard it, but it was loud for my taste. If you like your stuff to have big volume, go for it.
     
  14. sandawgk5

    sandawgk5 3/4 ton status

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    Avery I run a Super 40 and it is pretty quite as far as I am concerned. I have been told it has the same tone as a 40 series but not as much interior noise.

    Post #240 has a video of me pulling on a rig in the desert last weekend where you can here my exhaust for something to compare it to.

    I run a Magnaflow cat super 40 to a custom tailpipe that exits at the rear corner all 3".

    Ira
     
  15. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    Yeah but when the flowmasters are $75 why buy the knockoffs?

    Ok here's another question...I have been doing some work w/ the MIG lately...what do shops use to do exhaust systems? Will I burn through it if I just cut off my current muffler and weld a new one on? Or do they use clamps, tack it only, etc....I haven't ever really thoguht about how they do it.
     
  16. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    Your a good kid Avery...parents must be proud.:bow:
     
  17. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    Cool...thanks for the link...that does sound nice...

    here is a super old movie of my truck...not really to hear the exhaust originally but you can hear what it sounds like now...

    like the first 20 seconds...nice tone but not as loud as I would like...and obviously this is at an idle but its all I have at the moment...
    Just turn it up...:)
    http://video.google.com/videoplay?docid=186702427860021929&hl=en
     
  18. sandawgk5

    sandawgk5 3/4 ton status

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    In this link is how I did my exhaust

    http://coloradok5.com/forums/showthread.php?t=200150

    All of the welds were done by mean with a mig machine. The key is too clean the tubing well and grind the ends that you intend to weld even if it is aluminized it will help with cleaner welds. I used an overlaping tack method and I would weld a few tacks then rotate and weld 180 on the other side just to help with shrinkage. Also a tip Rene gave me is to run the voltage higher than you would normally for the thickness of material. This helps ensure adequate penetration when doing the overlaping tack method.

    Ira
     
  19. sandawgk5

    sandawgk5 3/4 ton status

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    Also the new muffler should be sized to slip over the existing pipe so I would slip it on and mark with a sharpy then grind the sharpy mark away then weld it up.

    Ira
     
  20. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    another great link...thanks.
    I need to measure mine and see what I have but I believe it's all 3"...so does that mean that the pipe is probably ohhh say 2 15/16" OD while the muffler/cat/etc. are 3" ID so that they slip over?

    BTW paul or rene you can move this if you want...not really lounge material anymore :)
     

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