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  1. #51
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    Click here to enlarge Originally Posted by DakarE36 Click here to enlarge
    Supposedly it had the old "quieter" knock siren, but when you toss the keys to a soft-core porn star at the drag strip, sh*t can happen.
    Sad...you would think the #1 fan boi would have all the latest and greatest upgrades and updates.

  2. #52
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    HOOD is open. Just trying to fix my AEM back in. Put hood back togather then off to VAC to see what parts are needed for my fried DSC.

  3. #53
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    Click here to enlarge Originally Posted by BattaM3 Click here to enlarge
    HOOD is open. Just trying to fix my AEM back in. Put hood back togather then off to VAC to see what parts are needed for my fried DSC.
    What did you have to do in order to get it open?

  4. #54
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    Sit there and turn the raiser things for hours till they popped off. Took the grills off. There was no room real to turn a wrench so I just turn it all I could till it was done. Like a 1/8th turn forever. The cause was the plastic piece around cable broke. Zip tied that $#@! now.

    Trying to fit my AEM back in nice and perfect then to VAC. Props to hpf for fitting that thing in there. I'm killing myself to make it look perfect like they do.

  5. #55
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    Here is the "diagnosis" and the tear down pics:

    Well I was a little suprised at what the failure turned out to be. Two valves had sizeable holes in them. They are not burned but broken, in addition two spark plugs have the tips blasted away. The engine is in perfect condition, no scoring on the walls. Visual inspection of the motor shows a very healthy bottom end. HPF installed another head on the car to make sure I can get to bimmerfest on time. It's clear that no EMS could have saved my head. The real question is what happened, HPF is scratching their head over this one. It could be than my head simply had a ton of miles on it. 80,000 miles on this head, maybe time and heat simply got to it..
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  6. #56
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    Lets hope it doesn't have valve bits in the turbo, or cracked ring lands.
    Click here to enlargeClick here to enlarge

  7. #57
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    I wonder what caused that..

  8. #58
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    I think just to be totally fair about the source-citing thing, maybe mention you got that post and the pictures from e46-fanatics...

  9. #59
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    Click here to enlarge Originally Posted by nickr519 Click here to enlarge
    I think just to be totally fair about the source-citing thing, maybe mention you got that post and the pictures from e46-fanatics...
    It's quoted, and you mentioned it although the pics are not hosted on fanatics, we're good.

  10. #60
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    Possibly an issue with the tune. May have run with a bit too high of cylinder temp and pressure. The only way to tell for sure would have been EGT logging.

  11. #61
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    Click here to enlarge Originally Posted by J.J. Click here to enlarge
    Possibly an issue with the tune. May have run with a bit too high of cylinder temp and pressure. The only way to tell for sure would have been EGT logging.
    So you don't buy the explanation?

    It's clear that no EMS could have saved my head.
    Really?

  12. #62
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    Click here to enlarge Originally Posted by THATDONFC Click here to enlarge
    I wonder what caused that..
    Dyno queen tuning doesn't last long on the track.
    Click here to enlargeClick here to enlarge

  13. #63
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    Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
    Dyno queen tuning doesn't last long on the track.
    I don't think that is necessarily fair. They have had some peak power tunes, sure.

    The Pro-EFI is making the same if not better numbers just with what seems to be a cleaner curve.

  14. #64
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    Unfortunately, I do not believe anything that guy says. Injectors ? Fuel Pump ? Hmmmm we may never know. If it were fuel related I would think it would have cooked more plugs. Meth related ? He did mention some issues in the last drag strip thread when that chick drove before Vegas. Something melted those plugs and caused those valves to fail. So is this chalked up to an HPF motor failure ?
    Last edited by J.J.; 05-10-2011 at 01:04 AM. Reason: Spelling

  15. #65
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    Click here to enlarge Originally Posted by J.J. Click here to enlarge
    Unfortunately, I do not beleive anything that guy says. Injectors ? Fuel Pump ? Hmmmm we may never know. If it were fuel related I would think it would have cooked more plugs. Meth related ? He did mention some issues in the last drag strip thread when that chick drove before Vegas. Something melted those plugs and caused those valves to fail. So is this chalked up to an HPF motor failure ?
    Couldn't detonation/lean conditions cause those plug issues?

  16. #66
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    Darn it....You quoted my misspelling.
    With detonation there should be more evidence. Maybe pitting if it was bad enough.

  17. #67
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    Maybe the meth wasn't distributing evenly?

  18. #68
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    Many in the know with tuning are stating its a tuning issue.
    Click here to enlargeClick here to enlarge

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    1 out of 1 members liked this post. Reputation: Yes | No
    Take a good look at the spark plug tip,it looks like detonation

  20. #70
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Couldn't detonation/lean conditions cause those plug issues?
    Yes - crack the ground strap from the plug and it getting pinched between the (heat stressed) valve and seat... crack. That bit went through the turbine housing as well.


  21. #71
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    Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
    Many in the know with tuning are stating its a tuning issue.
    The engine didn't do that to itself...that's for sure, but I'm not convinced of some of the explanations.

    Did detonation happen? Yup

    Did the valve overheat? Yup

    Did the spark plug ground strap get melted? Yup

    The sequence and how is really the main question.

    Everyone is just guessing at this point without having the hardware in your hands and the data log from the ECU (If it was available)

  22. #72
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    Click here to enlarge Originally Posted by THATDONFC Click here to enlarge
    I wonder what caused that..
    My guess.. his valve lash on the exhaust side was too tight, or carbon build up kept the valve from cooling properly. This is a classic case of a burned exhaust valve that finally fails. This didn't happen instantly, it tooks months to get to that point. The intake valves also are not a tan ashy color which further proves his exhaust valves were burned and running hot.

    I've seen this more than once in my life. It is almost always due to either high miles on the seats, or improper valve lash. My bet.. improper valve lash. This had nothing to do with the tune or even detonation.

    When you are running this kind of HP you need to run your exhaust valves with a little extra tappet clearance. You young guys have gotten spoiled with hydraulic lifters.
    Last edited by ccsykes; 05-10-2011 at 11:12 AM.

  23. #73
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    Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
    The engine didn't do that to itself...that's for sure, but I'm not convinced of some of the explanations.

    Did detonation happen? Yup

    Did the valve overheat? Yup

    Did the spark plug ground strap get melted? Yup

    The sequence and how is really the main question.

    Everyone is just guessing at this point without having the hardware in your hands and the data log from the ECU (If it was available)
    If the 9v battery had juice we should.

    Click here to enlarge Originally Posted by ccsykes Click here to enlarge
    My guess.. his valve lash on the exhaust side was too tight, or carbon build up kept the valve from cooling properly. This is a classic case of a burned exhaust valve that finally fails. This didn't happen instantly, it tooks months to get to that point. The intake valves also are not a tan ashy color which further proves he exhaust valves were burned and running hot.

    I've seen this more than once in my life. It is almost always due to either high miles on the seats, or improper valve lash. My bet.. improper valve lash.
    dyno queen tuning has reared its ugly head, or not.
    Click here to enlargeClick here to enlarge

  24. #74
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    Click here to enlarge Originally Posted by GG///M3 Click here to enlarge
    dyno queen tuning has reared its ugly head, or not.
    It had nothing to do with the tuning. It's just a burned valve. Nothing more. Look at the picture of the head, you can barely see the next cylinder over but you can tell the intake valves are just as carbon sooted as the exhaust valves. Like I said, I would be willing to bet money this was caused due to the valve lash being too tight which caused the seats to prematurely fail. Once the seats failed the exhaust valve burned and over time metal fatigue set in and the valve started to form cracks.. which lead to the failure.

    I may be a relative newbie to the modern world of EMS's and fuel injectors, but I have built more motors than I can remember and I have seen this problem many times over. The tip off was the carbon sooted intake valves.

  25. #75
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    Click here to enlarge Originally Posted by ccsykes Click here to enlarge
    It had nothing to do with the tuning. It's just a burned valve. Nothing more. Look at the picture of the head, you can barely see the next cylinder over but you can tell the intake valves are just as carbon sooted as the exhaust valves. Like I said, I would be willing to bet money this was caused due to the valve lash being too tight which caused the seats to prematurely fail. Once the seats failed the exhaust valve burned and over time metal fatigue set in and the valve started to form cracks.. which lead to the failure.

    I may be a relative newbie to the modern world of EMS's and fuel injectors, but I have built more motors than I can remember and I have seen this problem many times over. The tip off was the carbon sooted intake valves.
    So burnt/melted plugs happen from this as well?????????????????????????????????????????????? ????
    Click here to enlargeClick here to enlarge

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