Manifolds...

  1. Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0
    #1
    'Ello Friends...

    I'm talking Manifolds here, What is actually better for gas flow?

    4-2-1 or 4-1?

    Without naming brands, I have one of each and the 4-1 has bigger pipes and I'd of thought it'd be better for gas flow, but I hear from a lot of people that 4-2-1's are better for Gas Flow?

    I can't see how, it has smaller pipes and I'd of thought that gas would slow down when it's meeting from 2 into 1 rather than 4 into 1?
  2. Saxperience Forum Bum Joined: May 2007 Posts: 4857
    #2
    Does not really work like that. Both can work very well depend how well there designed and matched to your engine.
  3. Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0
    #3
    Hmmm, That's True, 4-1 is Piper and 4-2-1 is Raceland.

    Both very good I hear?

    I think I'll just experiment with them to see what one works best lol.
  4. Saxperience Forum Bum Joined: May 2007 Posts: 4857
    #4
    I suspect both will work well so don't think you can go far wrong. That is a great plan given them both a try. If you can blag some cheap rolling road time it may even be worth comparing them both on that. But for a road car you cant go wrong with whatever just feels right to you. Another thing to think of it quality as the raceland ones are quite cheaply made. If there both much of a muchness id probably go with the piper for this reason alone.
  5. Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B
    #5
    id stick with the piper purely because its piper, sell the raceland
  6. Saxperience Forum Bum Joined: Dec 2009 Uckfield, East Sussex Posts: 3362 Citroen saxo 1.4 furio
    #6
    Agreed, the piper will be far superior in quality. But if you prefer using the raceland one it's still stainless steel so you won't need to worry about rust etc. The piper will just put up with more punishment. And won't crack as easily.
  7. Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0
    #7
    Thanks guys, I've already bent the Piper a bit where I caught a Level Crossing =/

    But it's alright lol
  8. Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)
    #8
    larger is not always better. Its about optimising gas velocity. Both are good, the Raceland is cheaply manufactured but as its a copy of the supersprint it performs very well, nearly as good as the supersprint
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  9. Frequent Poster Joined: May 2009 carmarthen Posts: 684 citroen saxo vtr phase 2
    #9
    i got a 4-1 piper at about 4 k revs gives you a good kick at high revs youl notice the diffrence straight away ! and since ive decatted my car im getting better mpg!
  10. Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0
    #10
    Quote:
    Originally Posted by rollerdan View Post
    i got a 4-1 piper at about 4 k revs gives you a good kick at high revs youl notice the diffrence straight away ! and since ive decatted my car im getting better mpg!
    Yeh the Piper does work well. Makes it should really loud too lol gota love that
  11. Saxperience Addict Joined: May 2009 Somewhere in Bonnyland Posts: 10669 Super clean mk5 Golf Gti and 306 hdi
    #11
    Had a 4-1 piper before and a straight through with magnex and it sounded the tits mate.
  12. Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0
    #12
    I think I'll use my 4-1 on new Engine