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  1. #76
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    Click here to enlarge Originally Posted by bdtsulev Click here to enlarge
    That would be very simple to fabricate
    said no person ever lol
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  2. #77
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    Click here to enlarge Originally Posted by bdtsulev Click here to enlarge
    Combustion continues even after the cylinder is exhausted, more so the farther timing is pulled back.


    If i were you guys i would consider ceramic coating the o2 sensors (assuming thats possible) or build copper water jackets plumbed into the factory cooling system. That would be very simple to fabricate and should solve your overheating issue.
    i did think of that, as the exhaust gases are definitely hot enough to keep burning any fuel that wasn't in the combustion chamber.. though i'm pretty sure this engine would have fairly complete combusion?


    and considering the DME is apparently happy with O2 sensors being pretty far away as well as fairly close... it doesn't seem enough to worry about


    and for the purposes of this discussion, it should be assumed that no meaningful AFR changes would occur?.. especially, again, with pre turbo O2's keeping the DME perfectly happy.
    boop

  3. #78
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    Question

    Click here to enlarge Originally Posted by Flinchy Click here to enlarge

    and for the purposes of this discussion, it should be assumed that no meaningful AFR changes would occur?.. especially, again, with pre turbo O2's keeping the DME perfectly happy.
    is it? How do you know?
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  4. #79
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    is it? How do you know?
    the thousands of miles of road use that single turbos have so far gotten?

    eleventeen's experience for.. was it 5000 miles?

    that's long term test enough.

    out of everything that's gone wrong with all the singles, O2 sensor codes not related to the sensor actually dying, is something i haven't seen a report of?
    boop

  5. #80
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    Click here to enlarge Originally Posted by Flinchy Click here to enlarge

    and considering the DME is apparently happy with O2 sensors being pretty far away as well as fairly close... it doesn't seem enough to worry about


    and for the purposes of this discussion, it should be assumed that no meaningful AFR changes would occur?.. especially, again, with pre turbo O2's keeping the DME perfectly happy.
    I agree. It shouldnt be a problem at all because continued burn shouldnt affect air fuel ratio (someone correct me if im wrong)

  6. #81
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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    said no person ever lol
    Well compared to designing a cast manifold or something, a water jacket doesnt seem too ridiculous, but i have been wrong before

  7. #82
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    Click here to enlarge Originally Posted by bdtsulev Click here to enlarge
    I agree. It shouldnt be a problem at all because continued burn shouldnt affect air fuel ratio (someone correct me if im wrong)
    well, it can only burn as much air and fuel as was injected i guess?

    not sure if i'm thinking about it wrong either.
    boop

  8. #83
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    Click here to enlarge Originally Posted by Flinchy Click here to enlarge
    the thousands of miles of road use that single turbos have so far gotten?

    eleventeen's experience for.. was it 5000 miles?

    that's long term test enough.

    out of everything that's gone wrong with all the singles, O2 sensor codes not related to the sensor actually dying, is something i haven't seen a report of?
    How thorough and up front are people being though? It remains to be seen what happens to the wb sensors calibration over time if the theory holds true that they are calibrated off the post cat 02s. Long term testing will be needed along with a secondary wb to indicate additional readings.
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  9. #84
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    Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
    How thorough and up front are people being though? It remains to be seen what happens to the wb sensors calibration over time if the theory holds true that they are calibrated off the post cat 02s. Long term testing will be needed along with a secondary wb to indicate additional readings.

    With any aftermarket turbo I would run a separate wideband. Good cheap insurance.


    How hard/long would it take to fab up a tubular manifold similar to one of the cast I posted above?

  10. #85
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    You would need an engine to fab off of, and room requirements (measuring engine bay etc)

    my 10g 304 stainless turbo manifold was about 1800 bucks to have it made. Its work of art as well
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  11. #86
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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    You would need an engine to fab off of, and room requirements (measuring engine bay etc)

    my 10g 304 stainless turbo manifold was about 1800 bucks to have it made. Its work of art as well
    Got any pics?

  12. #87
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    Is for an S52, so its not really relevant (I wouldn't think)
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  13. #88
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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    Is for an S52, so its not really relevant (I wouldn't think)
    Probably not super relevant but it is still an inline 6 turbo manifold. I was just curious what $1800 of custom manifold looked like.

  14. #89
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    Click here to enlarge Originally Posted by Torgus Click here to enlarge
    I was just curious what $1800 of custom manifold looked like.
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  15. #90
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    1 out of 1 members liked this post. Yes Reputation No
    wow that $#@! looks totally custom yo. I want.

  16. #91
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    Kill it with fire!



    Wait....looks like someone already did....
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  17. #92
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    Click here to enlargeClick here to enlarge
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  18. #93
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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    Click here to enlargeClick here to enlarge

    How long ago did you buy that? I wasn't aware Jon was still selling these. Everyone had huge issues with boost creep on these manifolds.

  19. #94
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    I was literally one of the first ones bought from him years ago. that file photo is *my* manifold.
    yes, i have boost creep. do i care? not really, i tuned the car to account for it. its another reason i run E85, because i ran out of octane when tuning.

    the lowest boost i can run is about 18psi, unless i wanted to pull the manifold and put in two wastegates..... and that wasnt happening.
    who cares when you are running 28psi? Click here to enlarge i dont Click here to enlarge
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  20. #95
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    Isn't 666 done due to Chinese knock offs?
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  21. #96
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    pretty much.

    The thing is, is you CANNOT substitute quality and workmanship for chinese garbage.
    I still think people would buy his stuff, but its the cheap asses is what kills the market.
    think of it as the "walmart" shoppers of the automotive world- they dont care as long as its the cheapest..... and it sucks, because it kills quality peices like Jon's stuff. i really liked his work.
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  22. #97
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    I really liked his stuff too but I definitely get his perspective. Still, it sucks.

    I mean the cost isn't the materials it's more in the design. Once you have the design and others rip it off that is where it hurts.
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    1 out of 1 members liked this post. Yes Reputation No
    I think you guys might be looking in the wrong direction. Why would you want a software "solution" that just sends false feedback to the DME that would just keep it in the dark as to what is actually happening in the engine? I would think the way to "fix" the preturbo O2 sensor issue is to identify WHY the DME needs these two signals to run properly and then figure out how to accommodate that DME need in your solution. Such as, do we need the 2 feedback signals because the engine gets such different AFR mixtures between the front and rear bank? If so, why does that happen? Could it be the intake manifold design? If so, what would happen if we designed one that gave a much more even amount of air to each cylinder? Then would we have to worry about bank 1 being different from bank 2? Would we still have an issue with cylinder 1 or 5(which ever seems to run the leanest)? If not, could we then eliminate the 2 O2 sensors for 1?

    I think we need to be asking more questions and thinking more "globally" about the issue, before we try to just force something to "work."

  24. #99
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    It's relative. BMW wants to run 2 3 cylinder engines.
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  25. #100
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    I decided to weld 2 O2 sensor bungs into my downpipe after the turbo last week. Today I moved the front O2 sensors behind the turbo, I got codes 29E0 and 29E1 which I think were something like "Mixture Control Bank1" and "Mixture Control Bank 2". I disabled the codes and the car still ran like $#@! at idle, and *possibly at part throttle. Anything above part throttle seemed OK.

    I need to do more logging tomorrow to confirm, then I'll probably move them back in front of the turbo and see if it runs good again. Lately I've been beating the car like it owes me money, so I think even with the big heat-sinks I have the O2 sensors might be on the way out.
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