Lets hear some mean sounding SBBs!

Discussion in 'Small Block Tech' started by Tricolor72, Jun 18, 2011.

  1. Tricolor72

    Tricolor72 Well-Known Member

    I agree that 3" exhaust may be too much for a 350 but in the same respect Buicks move alot of volume. If you look at some dyno simulations of Buick 350 combinations you will see just how much volume a 350 can handle. Some of the cfm requirements are insane, I remember reading up on the TA performance build and seeing that there were gains to be made even with a 1000cfm carb. How many 400hp Chevy motors run 1000cfm carbs or even 800cfm?

    Not arguing that 3" isn't too large, just saying I don't personally think there would be any noticeable difference between 2.5" and 3" exhaust at 350 and 400 horse levels. All that aside 3" exhaust sounds wicked:Brow:
     
  2. lostGS

    lostGS Well-Known Member

    I just put a Jegs Header back on the wagon. Sounds good but need the Headers to go with it. I just slid the new pipes over the old 2" head pipes, so It leakes alittle.


    Tim
     
  3. shadetree6981

    shadetree6981 Active Member

    In fact I do. Here's a clip letting her fly to 7k like an idiot! lol She has a lot of "pop" when you let off of the hammer.
    http://www.youtube.com/user/shadetree6981#p/a/u/0/EjTtB8eAjwE

    So I guess the question I have for the consensus goes like this. Is 3" exhaust too big for the 350?

    Right now mine is 2.5" coming out just behind the doors. I just did it to get by. Being a young buck, I was TOO eager to get behind the wheel once the mill was ready to run. I do plan to do a much better and more permanent job as soon as funds are good to do so. I want to go with some 40 flowmasters and 3" tube for that deep sound, but I am all ears for suggestions.

    I'll get some more vid this week when I go do some work on it. (it's not at my house.):(
     
  4. Tricolor72

    Tricolor72 Well-Known Member

    That just sounds vicious, that is exactly the sound I am looking for
     
  5. sean Buick 76

    sean Buick 76 Buick Nut

  6. sean Buick 76

    sean Buick 76 Buick Nut

    Under 500 HP 2.5 duals are great IF the bends are nice and not mandrel done... 3" duals are the best for over 500 hp in most cases.

    I am going with custom tube headers to turbos on each side and dual 3" exhaust.
     
  7. shadetree6981

    shadetree6981 Active Member

    Thanks, maybe I will just go with 2.5". I highly doubt I'm pushing 500hp. It's been so long since I built the engine, I'll have to dig through my old paperwork to see if I can even find the specs on the cam. I know it wasn't huge!

    Those headers hang way low and already are a lil flat on the bottom primaries!:Dou: With our crappy roads up here, I'll have to get the exhaust tucked up as far as I can!

    I'm not sure what the popping is after the hammer. It's always done that, I've had several carbs on it over the years, and have adjusted everything over and over for other reasons. It doesn't bug me so long as it aint damaging! Maybe it's just a glass pack thing? yes, no? Maybe over reving isn't so smart? lol

    I'll get a newer vid going sometime this week. I took that back in '06.
     
  8. Tricolor72

    Tricolor72 Well-Known Member

    The popping is a glasspack thing and I really don't recommend revving over 5000 rpm on a stock engine although I'm sure 5500 is within what the safe limit is
     
  9. shadetree6981

    shadetree6981 Active Member

    I kinda thought that was just a thing with gp's. I just put 'em in temproarily! (for 12 years).

    They still even have the same coat hanger wire holding them up!
     
  10. exfarmer

    exfarmer Well-Known Member

    You don't ussually get much resonance with glasspacks.
     
  11. Lucy Fair

    Lucy Fair Nailheadlova

    Magnaflow.:3gears:
     
  12. shadetree6981

    shadetree6981 Active Member

    For the record, I was parked in a car port when I took the vid. That may have something to do with resonace!
     
  13. New SBB

    New SBB That HURT

    I am as of yet still without an operational SBB, however the exhaust note is of great importance to me. I go to cruises to gawk on a routine basis, where most of the usual suspects are in force: Chevies, Fords, Mopars. For a yet-to-be-identified reason, most of the GM products have what I will call a tinny, sheetmetal sound to them. I dont know if the prolific use of a particular Flowmaster is to blame or what. This is only noticed at idle. I suppose when under acceleration that sound is less noticable. On the rare occasion that I find a Buick and the owner with it, I ask what they are running for a muffler, and then try to be around when they fire it up, just so I can have some actual non-recorded sound to judge by. So far, I have only two go on: Flowmaster 40s (didnt like em), and Dynomax (kinda quiet).
    I had a 5.0 Mustang a while ago that came to me with standard factory dual exhaust. I added shorty headers and Borla mufflers. Borla is what I have on my daily driver Mazda V6, so I assumed I could count on a nice rumble from the 5.0. Bad choice. The Borlas were quieter than stock.
    Anyway, I want to hear Magnaflow on a 350 Buick and hope it has a sound that doesnt make me feel like I'm in a refrigerator.
     
  14. Phil

    Phil It really *is* a 350...

    SuperTrapps!!
     
  15. TXGS

    TXGS Paint by numbers 70 GS 455 4spd

    I have a video of mine with open headers. I will see if I can find it
     
  16. Tricolor72

    Tricolor72 Well-Known Member

    Just installed my Thrush 2 chamber welded mufflers and I am very happy, sounds different than flowmaster to a small degree but definitely captures that musclecar sound very well, especially coupled with the h-pipe. I am sure I will love the drone but a small price to pay to get the trademark chambered muffler sound. Also the best part- These mufflers were $35 a piece!! That is cheaper than glasspacks:puzzled:
     
  17. Thomaswarlord

    Thomaswarlord Well-Known Member

    Headers add that "tin" sound at idle.
     
  18. Tricolor72

    Tricolor72 Well-Known Member

    Not too bad considering its a stock motor :laugh:
    <iframe width="960" height="750" src="http://www.youtube.com/embed/_epUTdAwwjI?rel=0" frameborder="0" allowfullscreen></iframe>
     
  19. eagleguy

    eagleguy 1971 Skylark Custom

    Your gonna want some Magniflows when you upgrade.:TU:

    Check out their site. They have demo video/audio with different Buick 350 setups. You'll see what I mean.
     
  20. churcher

    churcher Active Member

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