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06-18-2008, 03:33 AM | #46 | |
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I wouldn't exactly say that BMW is playing a ridiculous game - that's a bit harsh - but at the same time it seems like they've detuned the car. |
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06-18-2008, 05:39 AM | #47 | |
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06-18-2008, 05:41 AM | #48 |
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someone please just post some dyno graphs for comparison... but if this lag only happens in 1st gear, 3rd or 4th gear dyno pull wont show. on my wrx and friends STis, the turbo lag is on every single gear and you have to make sure the engine is above 3k rpm at all times which is annoying. there were cases where ppl do WOT at 2k rpm on hot days and got CEL.
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06-18-2008, 05:46 AM | #49 |
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Like others that have posted in this thread - I too would like to see actual proof that there is lag, how much and where. I mean personally I can deal with lag - I had an STi. But again, the beauty of the N54 was that there was no lag - I mean I thought that was BMW's justification for going twin turbo and away from the brilliant straight 6.
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06-18-2008, 07:06 AM | #51 | |
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06-18-2008, 08:38 AM | #52 | |
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From what I've been reading, seems like BMW is concerned with the current stock set up they originally put into the car hence, the new software. Let's not give BMW too much credit either.... |
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06-18-2008, 08:56 AM | #53 | |
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16+ psi....so 8.5 is normal w/12ish max from ECU. As far as BMW being crappy...???? If you were a company who manufactured a product that had normal performance specs, would you honor a warranty claim from someone who exceeded the specs? BMW is concerned with wastegate issue, some electrical issues and people tapping into the ECU with tunes. That's all v29.2 is. (right now) |
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06-18-2008, 09:14 AM | #54 | |
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I know this is a BMW forum and yes over modding a car isn't BMW's fault nor should BMW honor a warranty over this issue but let's not be so quick to let BMW off the hook. People up the boost on stock turbos all the time - although if he boosted it up to 16psi that's usually too much... |
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06-18-2008, 09:31 AM | #55 |
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Don't forget that the N54 is a high compression engine, 10.2 to 1. Pretty much every other turbo car on the market, at least with motors that were actually designed to be boosted, are relatively low compression, around 8 to 1, to account for the forced induction charge of 16 psi (round about stock numbers for the STi). Therefore, I am not surprised that high levels of boost (16+ psi) on a high compression engine resulted in something failing.
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06-18-2008, 09:36 AM | #56 | |
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I would agree, the issue here is he was WELL OVER what is safe. He even admits this in his forum and accept full responsibility. BMW is not having mass stock or slightly modded turbo issue. The parts aren't crappy. If they were I'd be the first in line bitching. |
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06-18-2008, 11:58 AM | #57 | |
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06-18-2008, 12:36 PM | #58 | |
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.. actually it is one of the reasons I love the car so much .. to me, it will take a LOT out of the car if lag is truely introduced .. Crowley
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06-18-2008, 01:58 PM | #59 | |
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Most people are unaware of resetting their throttle. With gas prices rising, a lot of people are driving more gingerly and forget that BMW's have adaptive throttle. The new PRogman is not an issue with any sort of "lag"... it's a driver issue. |
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06-18-2008, 02:13 PM | #60 | |
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The next question would be, if there is going to be lag, why not use a bigger single Turbo (more performance - can take more boost - plus don't have worry about another turbo) - I guess I'm just disappointed in BMW's solution - saves their asses but takes away from what the car is. |
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06-18-2008, 02:22 PM | #61 | |
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Because you will see more lag with a single. The reason BMW has 2 tiny turbos is to keep lag to a minimum. |
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06-18-2008, 02:38 PM | #62 |
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Ya but if we're going to get more performance out of the bigger/single turbo the trade off might be worth it. I'm not talking Evo lag - but smothing more managable like that in the STi? Also don't forget with the larger engine/bigger displacement it can handle a larger single turbo with minimal lag - so that if there was a lag equivalent to that being produced by the new software upgrade but we're gaining 20-30 more hp - not to mention onless mechanical part to worry about - why not?
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06-18-2008, 02:57 PM | #63 |
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Maybe someone will make a single turbo conversion, has to be some potential there, along with the potential of spending a huge amount of money.
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06-18-2008, 03:23 PM | #64 |
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It's already been done on the N54, now it's just a matter of making it practical for a 135i.
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06-18-2008, 03:41 PM | #65 | |
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There is going to be no "cheap" relatively lag free single turbo that is run by the stock ecu. Modding cars is never cheap or mechanical worry free. I learn a few cars ago, that if you really want ZO6 performance then you should just buy the ZO6. Cheaper in the long run and works every time you put the key in. I have blown up one engine in my car modding experience and that was enough to stop me from trying to push a turd to light speed. |
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