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exhaust systems

Discussion in 'V8 Development and Modification' started by quick308, Aug 5, 2006.

  1. quick308

    quick308 New Member

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    i am a bit unsure about which exhaust system to get. i was thinkin of gettin a twin 2.5inch system. but other ppl are tellen me to get a single 3inch system. it currently has a 2inch system i need somthin better tho cause the engine has had a far bit of work done to it since then. and incude some good brands as i dont know much about exhaust systems.
     
  2. greenfoam

    greenfoam New Member

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    Your choice, twins sound better singles are cheaper :) So long as you have twin cats on the single then there wouldn't be much difference in power. If you do get the twin system make sure it's got a crossover pipe/balance pipe in it or better still a merge chamber or X pipe type setup
     
  3. RVN 355

    RVN 355 New Member

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    go the single 3" Zorst - Pacmaker 4 into 1's good mid range torque. Lukey Ultra Flow Muffler in Stainless,Magnaflow High Flow Cat and Hot Dog to keep the noise down.
     
  4. AirStrike

    AirStrike Administrator Staff Member

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    Ive got extractors into twin 2.5" system that then goes to a single 3" before the diff. Sounds good and as for power, that plus HSV airbox and the fact its been looked after all its life netted 143.5rwkw.
    AirStrike :air:
     
  5. immortality

    immortality Moderator Staff Member

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    Which model/engine combo you got in there, if it's the older 308 black/blue pacemaker doesn't do a 4 into 1 extractor if you have the late VN style heads i believe they do. i'd go with the twin system with the cross over/balance pipe and some 3 chamber delta flow Flowmasters. go for the smaller diameter & longer length secondary/collector for mid range torque or the bigger & shorter collector for more peak power:)
     
  6. quick308

    quick308 New Member

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    it's a 308 blue motor. with yella terra heads. out of a 1981 vh ss
     
  7. immortality

    immortality Moderator Staff Member

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    which YT heads -3 or -9 as they have different exhaust ports, the -3 is based on the early heads with the siamesed center 2 exhaust ports and the -9 is based on the later style VN heads where the exhaust ports are all spaced evenly. the early heads with the siamesed center exhaust ports tend to have a hot spot between the 2 middle cylinders

    www.pacemaker.com.au/

    check their website for more info
     
  8. quick308

    quick308 New Member

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    i wld say it wld be the 3- heads?
     
  9. immortality

    immortality Moderator Staff Member

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    pretty sure pacemaker only does the tri-y design for this model, i'd get a twin 2.5" system all the way through with a balance pipe(b 4 the mufflers), with one muffler in each pipe b 4 the diff and straight pipes out the back. i think lukey might do a complete bolt on including headers but i have no idea how good they are???
     
  10. shanhsv

    shanhsv Luvo

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    sorry to jump on ur thread dude but i was wondering wat would be the better system if i wanted a really deep idle note,but still sounding beefy when i drive off without breaking law the too badly
     
    Last edited: Aug 23, 2006
  11. Boonz

    Boonz Donating Member

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    1 5/8 inch extractors, 3 inch cat,2 1/2 inch stainless, centre muffler as far back as possible, 4 inch resonator with 3 inch outlet
    beleive it or not muffler positioning is what gives every exhaust its unique sound
     
  12. shanhsv

    shanhsv Luvo

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    very good,cheers mate,ohh and one thing,any idea on the price this is gonna cost me
     
  13. Boonz

    Boonz Donating Member

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    arm and a leg lol......well extractors average about $550-$600..... cat about $300...piping coulple hundred....resonator about $250 for a decent one plus someone to fit it theres a days work there
     
  14. shanhsv

    shanhsv Luvo

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    so all up im looking at aound $1500,that sux but if it sounds as good as i want it to then $1500 i will pay,once again,cheers mate
     
  15. RVN 355

    RVN 355 New Member

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    140.2 kw for me with single 2.5" + HSV Headers
     
  16. shanhsv

    shanhsv Luvo

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    single or twin cats

    should i go just the one cat or get twins
     
  17. lorry

    lorry New Member

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    I put gene headers onto bro's 308 VH which are two piece, then lengthened the second part of the header making it about 1-2 foot longer into a twin 2 1/2, into a 3" vortex cherry bomb muffler, 3" over the diff into a 3" silencer out the rear. Around 103db@2000-3000prm . No cats were fitted as they aren't required in NZ. His motor pokes out 200rkw@5000rpm easy. We also flanged the vortex so it could be dumped. Sounded awsome but was bloodly loud @6500rpm.
     
  18. sir355

    sir355 Father Figure

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    Mate i am running pacemaker tri-y's into race cats ( 2 pipes with flangers at each end) balance pipe and twin hsv mufflers with dump pipes in my vr senator. I'm running the harrop intake with holley tb. Old school look and that awsome old school sound. Deep on normal take off and very loud when over the 4000 mark. Plus the ground rumbles!!
     

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