Results 1 to 9 of 9

Thread: New Intake Pipe

  1. 7th February 2012, 05:18 PM #1
    Dougal
    Dougal is offline ForumSage
    Join Date
    Sep 2007
    Location
    Kiwiland
    Posts
    7,246
    Total Downloaded
    0

    New Intake Pipe

    Here is my new intake pipe. It has dropped full load EGT's from 750C to around 680C. But the previous one was pretty awful.

    The original was a 1.75" crush bent tube swaged out to 2" at the sockets and welded onto the original section with the over-pressure valve socket. The original section was around 2" tube, the inlet to the manifold is 60mm, this new tube is 2.25", 57mm and gives twice the flow area around that bend.

    Original pipe and new raw materials.


    Flange cut off the old piping and new cut and prepped. I forgot how time consuming it is cutting and cleaning by hand.


    Test fit and tack on brackets and flange. I've turned and fitted sockets for the boost gauge fitting and boost compensator pipe.


    New vs old.


    Painted and installed.


    It's five years since I've used a TIG, I'm very happy with the result but still plan to replace this with an intercooler.
    Attached Images Attached Images
    Reply With Quote Reply With Quote
  2. 7th February 2012, 08:34 PM #2
    c.h.i.e.f's Avatar
    c.h.i.e.f
    c.h.i.e.f is offline Wizard
    Join Date
    Jul 2008
    Location
    Cessnock NSW
    Posts
    1,506
    Total Downloaded
    0
    nice job..... tig is fun even though i have only done it a few times.and geez thats a big drop in egt's i bet you were happy about that!
    did it effect the boost pressure at all with the new pipe? if not im upgrading to a larger intake diameter
    Reply With Quote Reply With Quote
  3. 8th February 2012, 06:19 AM #3
    Dougal
    Dougal is offline ForumSage
    Join Date
    Sep 2007
    Location
    Kiwiland
    Posts
    7,246
    Total Downloaded
    0
    I've now got significant boost just revving it at idle and a smoother lead-in than before.
    At cruise I'm reading about 1psi higher, peak boost is still the same, but will likely increase when I fix the low EGT's.
    Reply With Quote Reply With Quote
  4. 8th February 2012, 04:49 PM #4
    c.h.i.e.f's Avatar
    c.h.i.e.f
    c.h.i.e.f is offline Wizard
    Join Date
    Jul 2008
    Location
    Cessnock NSW
    Posts
    1,506
    Total Downloaded
    0
    nice that will make a big difference then...just wondering what type of pyro are you using?
    Reply With Quote Reply With Quote
  5. 8th February 2012, 05:23 PM #5
    Dougal
    Dougal is offline ForumSage
    Join Date
    Sep 2007
    Location
    Kiwiland
    Posts
    7,246
    Total Downloaded
    0
    I've got a VDO gauge but I'm using a smaller 3mm probe. The 6mm probe that came with the VDO was too slow reacting for my liking. On an acceleration run it would miss the peak temp by about 200C under the 3mm probe.
    Reply With Quote Reply With Quote
  6. 12th February 2012, 08:05 AM #6
    Dougal
    Dougal is offline ForumSage
    Join Date
    Sep 2007
    Location
    Kiwiland
    Posts
    7,246
    Total Downloaded
    0
    Last night after my boost compensator modification: http://www.aulro.com/afvb/isuzu-land...ml#post1626607

    I gave my max fuel screw another 3/4 of a turn to bring my max EGT's back from 680C to 750C. I'm now getting 24psi peak and 20psi at 2000rpm. Probably a little silly for non-intercooled but it's good fun to drive. I really should fit a wastegate.

    I think I have also found a way to route intercooler pipes to the front and I should be able to fit a 300x450mm core intercooler in behind the rangie grille. I'm not doing it anytime soon (got a nissan to fix and sell) but there is light at the end of the tunnel.
    Reply With Quote Reply With Quote
  7. 12th February 2012, 10:33 AM #7
    c.h.i.e.f's Avatar
    c.h.i.e.f
    c.h.i.e.f is offline Wizard
    Join Date
    Jul 2008
    Location
    Cessnock NSW
    Posts
    1,506
    Total Downloaded
    0
    good to hear...thats a pretty big increase would feel much better to drive now hows the smoke situation?
    Reply With Quote Reply With Quote
  8. 12th February 2012, 10:36 AM #8
    Dougal
    Dougal is offline ForumSage
    Join Date
    Sep 2007
    Location
    Kiwiland
    Posts
    7,246
    Total Downloaded
    0
    Quote Originally Posted by c.h.i.e.f View Post
    good to hear...thats a pretty big increase would feel much better to drive now hows the smoke situation?
    Slight haze on full acceleration (only visible in certain light), no smoke at full load.
    Reply With Quote Reply With Quote
  9. 12th February 2012, 06:52 PM #9
    c.h.i.e.f's Avatar
    c.h.i.e.f
    c.h.i.e.f is offline Wizard
    Join Date
    Jul 2008
    Location
    Cessnock NSW
    Posts
    1,506
    Total Downloaded
    0
    nice
    so seeing as you have a boost compensator im asuming if you are just on the verge of labouring and you plant your foot flat it does not blow smoke? any chance of somehow getting a video of your tailpipe whilst driving oneday when you get time?
    just interested to see the difference because if i was to do the same (not having a compensator) it blows a thick black cloud of smoke until rpm and boost rise which is expected i suppose...
    Reply With Quote Reply With Quote
« Boost compensator, how does it work ?? | Turbo onto 4jb1 »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!