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No exhaust???

Discussion in 'The Garage' started by mudbog42, Dec 10, 2006.

  1. mudbog42

    mudbog42 1/2 ton status

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    Ok I have a buddy who just torched his exhaust off :weld: and is now running just headers.:doah:

    I know this is bad and I think can burn up your valves because the scavenging effect is not there but if you ran just straight pipes you would be fine I think

    Somebody school me :deal: on this so I can explain to him why he should fix that:1zhelp:
     
  2. beater_k20

    beater_k20 Banned

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    the scavenging effect takes place in the collector of the header, so he should be fine. as for burning the valves, i run a set of 24" individual tube headers, and my buddies run some shorter than that on derby engines. never had a burnt valve with them, and they get WAY hotter than an engine in any other application.

    headers2.jpg

    IMAG0193.JPG

    IMAG0194.JPG
     
  3. mudbog42

    mudbog42 1/2 ton status

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    So there should be nothing to worry about??? Also don't know if it makes a difference but its a 98 tahoe, 5.7 vortech with the stock exhaust manifolds
     
  4. beater_k20

    beater_k20 Banned

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    so he's not running headers... how much pipe does he have left after the manifolds? if its less than a foot, he very well may have problems. not to mention the o2 sensors will get messed up readings.
     
  5. mudbog42

    mudbog42 1/2 ton status

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    Yeah my fault I should have made that correction but as for the cut it is right after the sensors so there is not very much pipe there
     
  6. Eric M.

    Eric M. 1/2 ton status

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    Nothing other than losing your hearing and becoming best friends with every cop in town!

    Eric M.
     
    Last edited: Dec 11, 2006
  7. trailblazr81

    trailblazr81 1/2 ton status

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    And sucking those fumes!!! :screwy:
     
  8. beater_k20

    beater_k20 Banned

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    the sensors wont get a correct reading because they wont be able to accurately judge the a/f mixture. it'll normally run rich when that happens. and with manifolds, the scavenge effect is virtually non-existant.
     
  9. blazinzuk

    blazinzuk Buzzbox voodoo Premium Member GMOTM Winner

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    i have been running open exhaust for a while now, not entirely by choice. I don't put very many miles on my truck but I did make the trek to Moab UT. about 500 miles one way with no ill effects at all. Of course this is on a 73 blazer with your basic headman headers and some turndowns
     

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