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another high boost N54 engine failure
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10-15-2010, 02:55 PM | #507 |
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Edit...well there he is right above me posting....there is the story.But, the guy did switch to a 12ohm board, not recommended, was running 20psi with Meth and Pump....and one morning he starts the car and kaputz. Damage already done.
Surprised he didn't blow his engine long before this time from what he was doing in some spectacular fashion without proper safeguards in place (rumored/allegedly). You want to blow your engine, run meth/93oct and 20psi with any kind of tune....I think we have about found the limits of the engine if something goes slightly wrong....like an injector taking a dive momentarily, or meth stops flowing (speculation, but just saying). It's the nature of the beast. Well at least we can probably safely agree that we are finding out, should I say, a few guys have found out, what you can NOT do long term with these cars. I would like to personally thank the pioneers of engine blowups in finding the limits, now most of us know what NOT to do.
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Last edited by techlogik; 10-15-2010 at 08:47 PM.. |
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10-15-2010, 03:11 PM | #509 | |||
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There is a number that would make the above statement legit. I just want to hear it from you guys so we all know that you have credibility and not continuous plausible deniability. We aren't going to reach that xx number anyway right??? So put your name on this and state the number or percentage. |
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10-15-2010, 03:11 PM | #510 |
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Im sorry to say that this pointless...
this Black vs. White deal went out with MAD comics technology will never prevail... nor will reason. >>>> supporting neither tune <<<< just technology |
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10-15-2010, 03:13 PM | #511 |
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Get a basic education on the subject of engine tuning and then let's debate the validity of my comments. People who have no basic understanding of engine tuning should probably assume a more passive role in this thread. Esp the poster who claimed that the BMW dme is special so common sense tuning doesn't apply.
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10-15-2010, 03:15 PM | #512 |
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10-15-2010, 03:15 PM | #513 | |
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Sevak mentioned he never logged timing... I've been pushing log timing strongly on n54tech.... maybe they will start listening to me. I've made threads, and DIY help with BT I can only do so much. |
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10-15-2010, 04:03 PM | #514 |
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If I had a tune w/ meth and supporting mods running 18 psi on x amount of 92 0ctane + x amount of 100 octane, how would the tune correct timing for this assuming I did not have the same mix each time?
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10-15-2010, 04:53 PM | #516 | |
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10-15-2010, 05:09 PM | #517 | |
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10-15-2010, 05:16 PM | #518 |
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i think he is going to get a complete rebuilt motor and the one he has sent to germany. Wont be any autopsy .
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10-15-2010, 05:29 PM | #519 |
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The end.
No one will know why this happened. Tuners move along - can't blame anyone. The ONLY thing we can know at this point, is that a piston didn't hold up. The ONLY conclusion you can jump to, is that for THIS particular car, the vehicle could possibly have used some forged pistons. -scheherazade |
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10-15-2010, 05:32 PM | #520 |
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This thread was very informative. Even behind the banter I have begun to see how varying tunes work. I will never stray away from GIAC, but hearing about the competition and how it works is pretty cool (coming from a guy who knows 0 about how a tune works other than easy numbers). I just feel like the same arguments are surfacing and it has become a circular tuning company banter-fest. Keep going at it boys, lol. It is interesting GIAC hasn't entered in yet and given their idea.
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10-15-2010, 05:34 PM | #521 |
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10-15-2010, 05:34 PM | #522 | |
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I know engine failure is a new thing for the n54 crowd. But the failure modes are pretty predictable given basic info. In this case, isolated cylinder and loss of compression. Shiv |
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10-15-2010, 06:11 PM | #523 |
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i dont know if a lot people know that you can grenade a engine with low boost.. it think the whole "boost" issue is not clearly understood by the masses. there are other relevant factors to building horsepower in a forced induction engine.
until someone comes to grips with this truth -- statements like x boost and y octane and z meth/NO2 is probably the best "safe" combination, will prevail as gospel. grabbing some hard core (not this fad stuff in magazines) information on how all the pieces of the puzzle fit together, should prove to go a long way in helping most people new to tuning.. anybody can be a parts changer -- dont get caught up in the riptide, 'cause at the end of the day it cost to make horsepower. if youre looking for a cheap thrill, this isnt a game to be played. |
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10-15-2010, 06:31 PM | #524 | |
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Not just for the compression reduction. I've seen engines in the ~500 whp range on stock internals, and they *eventually* threw a rod or cracked a land. Sometimes 6 months, sometimes a year, sometimes less. It didn't happen due to ping. It was too much power on stock internals, and something eventually broke. You can't blame anything on ping without looking at the piston and finding the signs. For all we know this guy had a poorly manufactured piston and it came to bare after he ran a tune. God knows we have people with leaky blocks, what else could be poor from time to time... Until you do look at the insides, just chill. You're using fear to run a propaganda campaign with this failure against BMS. Anyone could have suffered this failure - one of YOUR customers could have had a 'relatively poor' piston, and could have broken - then what? Is Procede crap? It's dirty to use it against your competitor. Especially with THOUSANDS of cars running tuned, and this particular car being ran to the extreme, you're blowing this way out of the water. Like everyone else, YOU should wait to pass judgment until you have something to judge. Who knows, maybe you're right, maybe you're wrong. If you don't know, you shouldn't speak. I wouldn't have a single issue with you saying everything you're saying, if you had some data to back it up. Pictures of this car's internals, logs of this car, etc. But you don't. No one does. Frankly, no one can say that the meth ever stopped. *Maybe* it worked fine the entire time... Let's all keep in mind that <almost> 20 PSI all the way to redline is not the typical tune. This is <almost> 2.5 times the normal pressure (+plenty of heat). This *could possibly* be a much more common story - all around - if <almost> 20 psi were common. We just don't know. For that matter, there are a few (very few) cars running BMS tunes with more aggressive setups - and they're still in one piece - and have been for longer. That alone speaks to uncertainty from one car to another. -scheherazade Last edited by scheherazade; 10-15-2010 at 06:55 PM.. |
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10-15-2010, 07:10 PM | #525 |
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I'll say it again for those who havent gotten it get. The only thing that is certain here is the DME tries to target 10-13 deg of timing with a jb3. Regardless of how much or how little boost it is adding. 10-13 deg of timing is mapped by BMW to support 5-8psi of boost. With the power kit, BMW increases boost by approx 2-3psi. And with that small change, they reduce the timing target 2 degrees in the midrange. Just as basic engine theory would suggest.
By contrast, A JB3 increases boost by 6-12 psi and doesnt actively induce any change in timing advance target. Too much timing is the cause of knock. Knock is the cause of piston damage. You do the math. Or if you feel comfortable with blaming things on a bad block or defective piston, that's cool too. |
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10-15-2010, 07:33 PM | #526 | |
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maybe they will start to listen to you and get a PROcede |
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10-15-2010, 07:34 PM | #527 |
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10-15-2010, 07:53 PM | #528 | |
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