Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

questions about my current exhaust situation...

Discussion in 'The Garage' started by muddysub, Oct 6, 2002.

  1. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

    Joined:
    Jun 23, 2001
    Posts:
    10,452
    Likes Received:
    489
    Location:
    my garage, Henderson, NV
    well as i stated in another post, my muffler fell off last night. so right now the exhaust ends at the middle seat. (suburban) and i noticed i get some fumes in the truck when it sits in one spot too long. can i buy a straight 5'-6' length of exhaust tubing? will the fact that my exhaust system is about 6' long and all it has in it is a cat hurt the motor? do i have enough back pressure with the way it is right now? can anything be damaged by my current exhaust "setup"? /forums/images/graemlins/confused.gif
     
  2. 87sm465np208

    87sm465np208 1/2 ton status

    Joined:
    Aug 28, 2002
    Posts:
    1,114
    Likes Received:
    0
    Location:
    illinois
    dont worry, just see if you can run it out to the side, like before the rear tire, thats waht i did to mine, sounded good too /forums/images/graemlins/smile.gif, i did mine with 2 1\2 inch SS flex pipe, worked well i dumped it right before the rear wheel so as your going down the road the whirling action of the tire creates like a tornato and churns the gases away from the truck, this is waht i heard from anotehr member when i was asking opinoins about an exaust solution, good luck, happy exaust making /forums/images/graemlins/grin.gif /forums/images/graemlins/thumb.gif
    /forums/images/graemlins/usaflag.gif /forums/images/graemlins/truck.gif
     
  3. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    If I ever get my bills paid off and can start spending money on the Blazer again, I'm going to get some headers, and run dual 2.5 exhaust with Flowmaster 40 series mufflers. Probley dump it out infront of the rear tires with some Meg's exhaust tips.
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    with just the cat on it you wont have enough back preasure
     
  5. MudbogAD

    MudbogAD 1/2 ton status

    Joined:
    Jun 29, 2001
    Posts:
    672
    Likes Received:
    0
    Location:
    Las Vegas Nevada, US
    So why have I seen trucks runnin Straight headers in mudboggs? It didn't hurt their engines.
     
  6. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    yes for a short amount of time it is ok and will give you more power but if you leave it that way it will burn up your valves /forums/images/graemlins/shocked.gif
     
  7. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    Short bursts and higher compression will do OK with open headers, but stock compression and long drives will burn valves with too little backpressure, not to mention it kills low end torque.
     
  8. BigOrange90Jimmy

    BigOrange90Jimmy 1/2 ton status Premium Member

    Joined:
    May 24, 2002
    Posts:
    2,923
    Likes Received:
    0
    Location:
    Wilmington, NC
    Sorry to cut in on the post, but while you're on the subject I thought I would ask. You're talking about having enough backpressure. My truck has true duals run out to the corners. It's factory manifolds dumping into 2.5" pipe. That runs back to 2 hollowed out tractor glasspacks (the kind with metal baffles instead of fiberglass). It then runs out to 4" tips. Does this have enough backpressure? Also, when accelerating, the popping sound switches from the driver's side, to the passenger's. What do you think would cause this.
     
  9. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

    Joined:
    Jun 23, 2001
    Posts:
    10,452
    Likes Received:
    489
    Location:
    my garage, Henderson, NV
    not sure about the glass pak duals question. but i was thinking about my exhaust today. would 3" pipe back to the rear axle and a 3.5-4" tip give me enough back pressure to be ok?.
     
  10. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    if they are hollowed out then you are basically running straight pipes so no you would not have the corect back preasure
     
  11. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    with or without mufflers and single or duals?
     
  12. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

    Joined:
    Jun 23, 2001
    Posts:
    10,452
    Likes Received:
    489
    Location:
    my garage, Henderson, NV
    without mufflers and single.
     
  13. BigOrange90Jimmy

    BigOrange90Jimmy 1/2 ton status Premium Member

    Joined:
    May 24, 2002
    Posts:
    2,923
    Likes Received:
    0
    Location:
    Wilmington, NC
    so that's what's making the pop switch from side to side? what do I do, but cat's back on?
     
  14. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

    Joined:
    Jun 23, 2001
    Posts:
    10,452
    Likes Received:
    489
    Location:
    my garage, Henderson, NV
    an x-pipe would cure that. it equalizes the pressure from side to side.
     
  15. MudbogAD

    MudbogAD 1/2 ton status

    Joined:
    Jun 29, 2001
    Posts:
    672
    Likes Received:
    0
    Location:
    Las Vegas Nevada, US
    Oh, OK. Scott, just buy a new flowmaster or something.
     
  16. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    you reallydo need to have mufflers on it /forums/images/graemlins/smile.gif just buy some 40 serise(sp?) flowmasters they sound awesome /forums/images/graemlins/smile.gif i like my exhaust to be 2.25 or 2.5 the 3in gives you more horse power but les tourqe and the 2.5 gives more tourqe but les horse power
     
  17. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    put a set of 40 serise flowmasters on /forums/images/graemlins/smile.gif
     
  18. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

    Joined:
    Jun 23, 2001
    Posts:
    10,452
    Likes Received:
    489
    Location:
    my garage, Henderson, NV
    well the way it looks i'll be trying on my doug thorleys this weekend and buying a whole new system soon. i'm thinking single 3" with a hi-flow cat and a 40 series.
     
  19. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

    Joined:
    Apr 21, 2001
    Posts:
    5,634
    Likes Received:
    0
    Location:
    Escondido, CA
    i ran 3 inch on my blazer, true duals, generic 18 inch double chamber mufflers, out the back at the corners. all on a stock motor.
    ran fine. high end was nice and sounded like a harley...
    grant
     
  20. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    </font><blockquote><font class="small">In reply to:</font><hr />
    i ran 3 inch on my blazer, true duals, generic 18 inch double chamber mufflers, out the back at the corners. all on a stock motor.
    ran fine. high end was nice and sounded like a harley...

    [/ QUOTE ] nothing wrong with 3inch pipe you will get a good top end but a lesser bottom end
     

Share This Page