Manifold i've just made

  1. ngt Saturated..

    Messages:
    126
    Greece
    How much amperage did you use ? Where did you use 2.4mm filler ? (pipe to flange i suppose ?) What diameter electrode ? 304L or 316L ?
    I am about to try and do something similar to yours for my alfa romeo. I am on the Designers Board at the moment !
     
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  2. rswinburne Member

    Messages:
    69
    Norway
  3. Rick Member

    Messages:
    639
    UK
    Haha, i don't think another manifold in/around the house would go down well ;)

    Yes, big filler just for around the flanges, maybe a little dab here and there, maybe if there is a small gap.
    I used a 1.6mm then switched to a 2.4mm, no real reason, i was just on 1.6mm for a real tight job but switched back when i had to sharpen, as i usually use 2.4mm red bands for everything.
    Collector looks ok, i'm guessing you did it on a dry job saw?


    Simon's car is horrendous off the line, but it was built more to be a good all round car not drag car. It might be better this year.

    I've seen that vid before. What times does that Audi do? :clapping:
     
  4. The more that I look at the photos of this, the more incredible it looks.

    I agree; it's a shame to bolt it to an engine - really, it should be in the Tate Modern or MOMA.

    Stunning work.

    Ian.
     
  5. ngt Saturated..

    Messages:
    126
    Greece
    Well its a dry band saw, but this collector is from pvc pipe !
    I have my jig ready (from a previous log style manifold, talked about in older posts) but i am trying to find how pipe bends and collector will go in place without wasting precious stainless...
    Small budget yes.
    So, you didnt mention, What were your amperage needs on average ? Did you go on the low or on the high side ?
     
  6. Rick Member

    Messages:
    639
    UK
    Oh yes, sorry.

    The machine i set to 130 amps for the pipe and 160 where it joins the flange.

    But, I don't spend much time on full pedal, so it would be very hard to say without having somebody watch the machine readout. i don't know, maybe 70-80 amps average i guess.

    Ah right, looks alright then, looked a bit "burred" but it will clean up.

    Remember the blade will defect more with stainless. Expect each cut to take 30 mins!

    I sell precut collectors, and might be able to get you a better price on your straight and elbows as i buy in bulk. (if this is seen as trading mods delete)
     
  7. lchris21

    lchris21 Member

    Messages:
    1,385
    Location:
    South Wales
    Awesome job, very impressive stuff.
    Will be having a go on manifold for a Zx12 mini project when I get round to it.
    Where do you get the bends from ?
    Hope it turns out as good as yours :clapping:
     
  8. Pete.

    Pete. Member

    Messages:
    9,334
    Location:
    Kent, UK
    Lovely job there Rick - much nicer than the one I made. I'm of the opinion that equal-length runners are nowhere near as important for a turbo manifold as for a NA tuned engine, though I did design mine to keep the runners as equal as possible given the space I had. Oh to have the room you get in a car engine bay :D
     
  9. hotrodder Member

    Messages:
    4,587
    SE England
    Nicely done. Only thing i'd critique is that filler additions could be tighter/pulse frequency increased- there's some 'fish eyes'/mini craters visible
     
  10. Rick Member

    Messages:
    639
    UK
    Awesome sounds like an interesting project for sure!

    I get them from a local company, PM me when your ready and i'l get you the details.

    No, they aren't as important as obviously there is pressure so your not after the same scavenging effect.

    I did notice this, i think its more down to my "downslope" (read me comming off the pedal too quickly) If i back the pedal off slower these are obviouslly avoided, I try to keep fairly large pulses as it's much quicker and allows me to move my foot a bit slower :)
     
  11. purdy
     
  12. hotrodder Member

    Messages:
    4,587
    SE England
    So you're 'pumping the pedal' rather than carrying the puddle? Can't really increase the pulse frequency if pulsing via a pedal but tightening up the filler additions/not moving as far forward between pulses will fix it. This is what i'm talking about...

    DSC_0959.jpg

    With a slow pulse that freezes the puddle there's nearly always some crater defects (from fish eyes through to full on pin holes), overlapping the filler additions by at least 50% will remelt them but you need more like 70 - 80% overlap to get a smooth root profile usually
     
  13. rswinburne Member

    Messages:
    69
    Norway
    I think Jonus's record in that car was 8.3 at 248kmh or something similar on that setup.

     
  14. Rick Member

    Messages:
    639
    UK
    Yes i understand what you mean, i back the pedal off to move to the next area. Using this method i can get 100% penetration without overheating the material. Mainly because there is a slight pause as the puddle freezes.

    With a 70-80% overlap like you mention i can't keep the weld shielded without stopping and starting all the time, maybe a trailing purge would help, but would make things awkward.
     
  15. Rick Member

    Messages:
    639
    UK
    Awesome times, do you have a link to more information about it?
     
  16. ngt Saturated..

    Messages:
    126
    Greece
    Rick ! USed 304L or 316L ? I see you used 3mm which tells me you had cracked manifolds in the past ? Really informative thread ! Thanks for sharing your work !
     
  17. rswinburne Member

    Messages:
    69
    Norway
  18. Rick Member

    Messages:
    639
    UK
    I've never had a problem with cracking (touch wood), but only ever made bike and n/a manifolds out of thin wall tube. When i first got thin wall i realised it was never going to be strong enough for a turbo manifold to last during normal day to day use.

    304 is generally the choice of most, it's 25% cheaper and 316 doesn't offer any real advantages other than its better corrosion resistance.

    There are more important things to consider when choosing your pipe though, you should ask for a "breakdown" on compare by looking up each property.
     
  19. Rick Member

    Messages:
    639
    UK
    Heres 1 i finished today.

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  20. Robotstar5

    Robotstar5 Casanunda Staff Member

    Messages:
    18,066
    Location:
    Birmingham
    Looks more like a work of art, we had to make do with the Long Centre Branch manifold for the Mini's in the 70's!
     
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